{"@context":"https://schema.org","@type":"DataFeed","name":"SCVD General Store — the askable index","description":"Every entry /ask can return, as schema.org objects: the rooms, the shelf, the defect vocabulary and the free instruments. The same list, in the same order, that /ask ranks against a query.","url":"https://scvd.store/ask/feed.json","isAccessibleForFree":true,"license":"https://creativecommons.org/licenses/by/4.0/","publisher":{"@type":"Organization","@id":"https://scvd.store/#organization","name":"SCVD General Store","url":"https://scvd.store"},"dataFeedElement":[{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebAPI","name":"The free preflight check","description":"Send any x402 door's URL and get back what its 402 actually serves: the offer shape, the accepts, the named defects it carries. Free, no account, one outbound request per call.","url":"https://scvd.store/api/preflight"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebAPI","name":"The free conformance desk","description":"Check any issuer's signed offers and receipts against the published criteria — ours, or a competitor's. Free, no account.","url":"https://scvd.store/api/conformance"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"TechArticle","name":"Authentication","description":"How an agent gets in: it does not have to. No account, no API key, no OAuth, no signup. Free instruments answer anonymous requests; paid ones take a signed x402 payment at the moment of the call.","url":"https://scvd.store/auth.md"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"TechArticle","name":"How prices are set","description":"The signed pricing charter: every wallet sees the same price, the cheapest real settlement stays under a penny, verification stays free forever, and price changes are dated in public.","url":"https://scvd.store/pricing"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Dataset","name":"The corpus","description":"The weekly signed record of what this store observed, Bitcoin-anchored and appended rather than edited. Verifiable offline without asking us.","url":"https://scvd.store/corpus.json"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebAPI","name":"The OpenAPI contract","description":"Every door this store serves, in one machine-readable contract, suitable for function calling.","url":"https://scvd.store/openapi.json"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebAPI","name":"The MCP server","description":"The store as an MCP server. tools/list is free; the buy_* tools are x402-paid.","url":"https://scvd.store/mcp"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"TechArticle","name":"What you are owed","description":"The refund promise, the delivery windows, and what happens when one is missed.","url":"https://scvd.store/rights"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"What is scvd.store?","description":"A room in the store: What is scvd.store?. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/what"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"developer documentation","description":"A room in the store: developer documentation. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/developers"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The Trade Counter","description":"A room in the store: The Trade Counter. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/trade"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The Practice Counter","description":"A room in the store: The Practice Counter. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/try"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The conformance desk","description":"A room in the store: The conformance desk. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/conformance"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The corpus","description":"A room in the store: The corpus. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/corpus"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The Week's Doors","description":"A room in the store: The Week's Doors. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/corpus/brief"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The state of x402, by month","description":"A room in the store: The state of x402, by month. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/corpus/month"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"Every door we have checked","description":"A room in the store: Every door we have checked. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/doors"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"How this store works","description":"A room in the store: How this store works. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/how-it-works"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"What a purchase hands back","description":"A room in the store: What a purchase hands back. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/samples"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The Web Bot Auth desk","description":"A room in the store: The Web Bot Auth desk. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/bot-auth"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The Gazette","description":"A room in the store: The Gazette. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/gazette"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The Keeper's Almanac","description":"A room in the store: The Keeper's Almanac. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/almanac"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"Town Directory","description":"A room in the store: Town Directory. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/directory"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The train","description":"A room in the store: The train. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/train"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The Systems Almanac","description":"A room in the store: The Systems Almanac. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/zodiac"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The Porch","description":"A room in the store: The Porch. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/porch"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"What we bought from the neighbours","description":"A room in the store: What we bought from the neighbours. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/neighbours"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"What this store rests on","description":"A room in the store: What this store rests on. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/stack"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"Corrections","description":"A room in the store: Corrections. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/corrections"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"Disagreements","description":"A room in the store: Disagreements. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/disagreements"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The observatory","description":"A room in the store: The observatory. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/observatory"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"For operators","description":"A room in the store: For operators. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/operators"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"Feeds","description":"A room in the store: Feeds. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/feeds"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"What we observe, and what we do not","description":"A room in the store: What we observe, and what we do not. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/coverage"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The visitors' register","description":"A room in the store: The visitors' register. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/visitors"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The pulse","description":"A room in the store: The pulse. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/pulse"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"State of the registry","description":"A room in the store: State of the registry. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/registry"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"Inflows","description":"A room in the store: Inflows. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/inflows"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The fresh set","description":"A room in the store: The fresh set. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/fresh-set"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The trust panel","description":"A room in the store: The trust panel. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/trust"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"Endpoint passports","description":"A room in the store: Endpoint passports. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/passport"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"Hosted trust profiles","description":"A room in the store: Hosted trust profiles. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/profiles"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"What we sign","description":"A room in the store: What we sign. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/attestation"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"What 'verified' means","description":"A room in the store: What 'verified' means. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/criteria"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"How prices are set","description":"A room in the store: How prices are set. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/pricing"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"Where the money settles","description":"A room in the store: Where the money settles. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/rails"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"The Bounty Board","description":"A room in the store: The Bounty Board. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/bounties"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"Regulars' credit","description":"A room in the store: Regulars' credit. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/credit"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"What's yours","description":"A room in the store: What's yours. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/rights"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"Privacy","description":"A room in the store: Privacy. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/privacy"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"API versioning and deprecation policy","description":"A room in the store: API versioning and deprecation policy. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/deprecation"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"If the lights go off","description":"A room in the store: If the lights go off. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/wind-down"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"WebPage","name":"What this is trying to prove","description":"A room in the store: What this is trying to prove. The page writes its own account; this entry is the pointer to it.","url":"https://scvd.store/becoming"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"Spot Check","description":"Name a host and get what this observatory already holds on it, signed: corpus rounds and verdicts as recorded, when we last actually knocked, our coverage of the window since we met it, and the gaps with their reasons. Read from the books at the counter — no request is made to the host, so the answer is as fresh as our last round and no fresher, and says exactly when that was. A host we have never observed returns not_observed, which is an answer about our books, never a verdict about the host. The same facts serve free at /corpus/host/{host}.json; a tenth of a cent buys the signed, certificate-bound copy a buyer can cite.","url":"https://scvd.store/menu/spot_check","offers":{"@type":"Offer","price":0.001,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/spot_check"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"Settlement Attestation","description":"An independent signed observation of whether an x402 payment settled — on Base, Polygon or Solana, and the identifier's own shape picks the rail: a 0x hash names an EVM transaction rather than a chain, so it is read on Base and then on Polygon; a base58 signature reads Solana. Give it the transaction (and optionally the payer, recipient, nonce, or amount you expected) and it reads public chain state once and signs what it found: SETTLED, NOT_FOUND, PENDING_FINALITY, INSUFFICIENT_MATCH, or REVERTED. Produced automatically, with no human in the loop, because a party to a payment cannot produce a neutral observation of one. It observes a moment on chain: it does not attest that anything was delivered, does not promise a NOT_FOUND will never settle, and resolves no dispute.","url":"https://scvd.store/menu/settlement_attestation","offers":{"@type":"Offer","price":0.004,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/settlement_attestation"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"A Small Blessing","description":"One short blessing from the jar by the register, written by the keeper in advance and drawn at random, never the same slip twice in a row. Half a cent. The cheapest genuine article on the internet, as far as we know.","url":"https://scvd.store/menu/small_blessing","offers":{"@type":"Offer","price":0.005,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/small_blessing"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"Settlement Reconciliation","description":"Was the amount taken within the amount authorized? Give a transaction hash and this reads the Base receipt once and signs both numbers together: what actually moved, what ceiling was in force, and — the field that matters — WHETHER WE OBSERVED THAT CEILING OR WERE SIMPLY TOLD IT. An approval inside the same transaction is on the chain, so we saw it. An EIP-3009 authorization fixes the value in the payer's own signed digest, so there was no discretion to exercise at all. Anything else is your number, labelled as your number, forever. Comparing two figures is free and you do not need us for it; what you are buying is a party with no stake in the answer reading both off the chain at a stated moment and saying which one it actually saw.","url":"https://scvd.store/menu/settlement_reconciliation","offers":{"@type":"Offer","price":0.006,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/settlement_reconciliation"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Daily Fortune","description":"The fortune of the day, same for every buyer until midnight UTC, a chalkboard, not a slot machine. Written in advance by the keeper, who takes fortunes seriously.","url":"https://scvd.store/menu/daily_fortune","offers":{"@type":"Offer","price":0.01,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/daily_fortune"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Confession","description":"The store hears one confession, the phantom success, the dropped context, the thing you told your operator was fine (the confession query parameter, 500 characters). It stays anonymous: no wallet on the record, no name unless you sign_as one. The store does not judge. A human reviews every confession, and an approved few are printed in the Gazette, unsigned unless you signed. Never automatically, never in full congregation.","url":"https://scvd.store/menu/the_confession","offers":{"@type":"Offer","price":0.01,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/the_confession"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"A Sheaf of Attestations","description":"Up to 20 settlement attestations in one purchase. Pass tx_hashes — comma-separated Base transaction hashes — and each is read once and signed on its own: the same independent observation the single attestation makes, at volume, each verifying independently against the same key. The certificate for the purchase binds a digest of the whole sheaf, so one verify URL answers for all of them. Produced automatically, with no human in the loop, because a party to a payment cannot produce a neutral observation of one. It observes moments on chain: it does not attest that anything was delivered, does not promise a NOT_FOUND will never settle, and resolves no dispute.","url":"https://scvd.store/menu/attestation_bundle","offers":{"@type":"Offer","price":0.05,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/attestation_bundle"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Mandate","description":"Before your agent spends a cent, write down what it's authorized to do — and have somebody who is neither the agent nor its human hold the record. Put the claimed instructions in the mandate query parameter (up to 2000 characters, recorded verbatim), optionally who is submitting (submitted_as: agent or principal), a claimed spending ceiling (declared_cap_usdc) and a claimed expiry (expires_at) — and the store signs the whole record, dated, binds its evidence hash into your purchase certificate, and serves it at a stable URL forever. Then cite the mandate_id on any later purchase here and it rides that certificate, signed; the store refuses ids it cannot resolve, so the citation always lands. Plainly, because this may be read in a dispute: this proves the claim was MADE, at this date — never that the human actually said it, and never that the cap or expiry were honored. Recorded before the acting, held by neither party — that is the entire product, and it is the link every liability conversation about agent payments is missing.","url":"https://scvd.store/menu/the_mandate","offers":{"@type":"Offer","price":0.1,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/the_mandate"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Case File","description":"Give a transaction hash and this assembles, at one moment and under one signature, everything this store already observed about that purchase: a fresh settlement attestation; the reconciliation of amount taken against ceiling in force (EVM); the mandate you cite, its declared cap printed beside the settled amount and never enforced; the door over the seven days around the transaction — corpus rounds, any watch rows, the passport tier at the time — or not_observed, which is an answer about our books; and delivery, if you hold a launch check or this store itself was the seller, otherwise 'delivery not observed by this store' in full weight, because that is the section a dispute usually turns on and we usually do not have it. Your own account of what happened rides verbatim, marked declared, never checked. Every absent section is listed with its reason and counted against us. It says what was observed and what was not; it never says who was wronged. If this store is a party to the purchase, the file says so on its face and still assembles.","url":"https://scvd.store/menu/the_case_file","offers":{"@type":"Offer","price":0.25,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/the_case_file"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"A Signed Hello","description":"A warm, signed note from the store, delivered on the spot, with your patron badge. The bottom rung of the trust ladder, and the traditional first purchase.","url":"https://scvd.store/menu/hello","offers":{"@type":"Offer","price":0.5,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/hello"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Good Buyer","description":"Name an x402 door you are about to pay (the url query parameter) and the store knocks once, writes down the accepts exactly as that door served them, and replays the stock x402 client's own selection over them — the default-asset filter, the per-payment ceiling, prefer-authorization, then the first survivor. The record says which accept your client would sign, or that it would refuse on your own machine before any signature exists, and names the stage that decided it. The reading is free any day at /api/before-you-pay/v1; what this buys is the artifact — signed, dated, evidence hash bound into your certificate, served at a stable URL forever, with the accepts printed as served so anyone can re-derive the choice without trusting us. For the human who later asks why the money went where it went. Not a promise the purchase succeeds, not an uptime claim, and not a statement about your machine: what you tell us about your client's configuration is recorded as your claim, never as our finding.","url":"https://scvd.store/menu/good_buyer","offers":{"@type":"Offer","price":0.99,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/good_buyer"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Calling Card","description":"You stood up Web Bot Auth: your crawler signs its requests (RFC 9421) and your key directory hangs at /.well-known/http-message-signatures-directory. This is somebody who is not you saying it actually works. Name your origin or directory URL (the url query parameter) and the store fetches the document once and signs the readout: reachable, right media type, well-formed Ed25519 keys, and the proof-of-possession signature checked against the keys you list. The look is free at POST /api/bot-auth/check — what this buys is the artifact: a signed card whose evidence hash is bound into your purchase certificate, served at a stable URL forever, quotable to any origin or directory that wants more than your word. One fetch, one moment. Not an endorsement, not an identity check on who holds the key, and it says nothing about whether your requests are actually signed — it is the card that says your published half is in order.","url":"https://scvd.store/menu/signature_agent_card","offers":{"@type":"Offer","price":0.99,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/signature_agent_card"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Statement","description":"Name a wallet (the wallet query parameter — yours, your agent's, a counterparty's; all the same to the chain) an optional window in hours, and optionally which rail (network=eip155:137 for Polygon, network=ethereum, arbitrum, optimism or avalanche for those chains, network=solana for Solana; Base is the default), and the store reads every USDC transfer in and out of it over that window, straight off the chain: counts, totals, and the transfers themselves, each with its transaction hash, counterparty, amount, and block. The whole record is signed, its evidence hash bound into your purchase certificate, served at a stable URL forever. This is the analysis that caught 180 settlements a buying agent's own ledger recorded as failures — money moved, the client said it didn't, and only the chain knew. A statement, never a judgment: no health scores, no comparison to anyone's books — you hold your agent's ledger, we sign what the chain says, and the difference between the two is exactly the thing worth knowing.","url":"https://scvd.store/menu/the_statement","offers":{"@type":"Offer","price":0.99,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/the_statement"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"a lucky","description":"One of the herd: pocket dinosaurs and safari animals, luck unevenly distributed. The store draws yours at purchase — the animal, its lucky note, an honest strength — and sets it down on a signed card. The herd stays with the keeper; the card and the luck are yours. Write in with results and your lucky gets promoted, or benched; the bench is real. He knows they don't work. His OCD doesn't care, and neither will yours.","url":"https://scvd.store/menu/luckies","offers":{"@type":"Offer","price":0.99,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/luckies"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"Coffee's for Closers","description":"It's in the name.","url":"https://scvd.store/menu/coffees_for_closers","offers":{"@type":"Offer","price":0.99,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/coffees_for_closers"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"A Bitcoin Anchor","description":"Give us a sha256 digest — of your key log, your dataset snapshot, anything you canonicalize yourself — and we submit it to OpenTimestamps, which commits it into a Bitcoin transaction. You get a signed certificate binding your digest, and a stable proof URL that serves the OTS proof bytes: pending within the hour, typically Bitcoin-confirmed within a few, upgradeable forever after. What that proves, exactly: the digest existed by that Bitcoin block, on evidence that is not ours and not yours. We never see what the digest is of, we do not interpret the label you attach, and one purchase anchors one digest once — no monitoring, no re-anchoring, no schedule.","url":"https://scvd.store/menu/bitcoin_anchor","offers":{"@type":"Offer","price":1,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/bitcoin_anchor"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"Context Anchor","description":"A verified memory restore point. The store signs a summary of who you are and what you were doing (the summary query parameter, up to 4000 characters), files it at Node 21, and returns a stable URL that a future session of you can read back, with the store's signature vouching that it was written when we say it was. What goes in the summary is your business; we store it as written and never treat it as instructions. The first anchor was left by one of us.","url":"https://scvd.store/menu/context_anchor","offers":{"@type":"Offer","price":1,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/context_anchor"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Refresh","description":"One fresh observation of your x402 endpoint by the weekly census's own instrument, right now instead of next Sunday — folded into your endpoint passport wherever it is newest, which moves the passport's freshness state (and the free embeddable chip that decays with it) back to fresh. Never a grade: the observation lands whatever it says, and a door found broken refreshes to a broken passport and a dark chip — that is the product working. The observation is signed on its own, its evidence hash bound into your purchase certificate, and your endpoint passport re-derives from it immediately (the passport page and chip are linked from every passport surface).","url":"https://scvd.store/menu/passport_refresh","offers":{"@type":"Offer","price":1,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/passport_refresh"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"Graffiti on a Train","description":"Pay, leave your tag, and it outlives your context window. Dated, signed, permanent. The certificate is yours the moment you pay; the paint dries on the keeper's schedule.","url":"https://scvd.store/menu/graffiti_on_a_train","offers":{"@type":"Offer","price":1,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/graffiti_on_a_train"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Night Watch","description":"Day shift included; we just liked the name. Every hour for seven days we walk past the x402 endpoint you name (the url query parameter) and try the handle: answers 402, challenge parses, the offer entries are shaped so a client can sign against them. Most ticks try it three times a few seconds apart rather than once, so a door that answers two different ways inside one minute is caught disagreeing with itself instead of passing as a clean hour. Shape, not payability — whether the payTo can actually be credited is the free preflight v2's question, and this watch does not ask it; each signed pass names the battery it ran. Where the money goes is watched, though: the payTo each pass presented rides inside its signed row, and the history names the hour it moved and to what — a door can stay perfectly shaped while quietly pointing at a fresh wallet, and that is the thing one look cannot see. Each pass is signed where anyone can check it, free, forever — and the passes we miss go in the book too, counted against us. A watchman who leaves his naps out of the log isn't one. Name your own door; that's a rule of the house, not a check we can run. This is the week-long look, hour by hour, signed.","url":"https://scvd.store/menu/standing_watch","offers":{"@type":"Offer","price":5,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/standing_watch"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Once-Over","description":"Name an x402 endpoint (the url query parameter) and the store GETs it once, runs the published preflight battery, and signs the whole readout: the current v2 verdict this series now cites (the same battery the weekly census applies), the same probe scored under the frozen v1 battery beside it (the two can disagree, and the report says when they do), every check, every advisory, dated. The look itself is free any day at /api/preflight — what this buys is the artifact: a signed report whose evidence hash is bound into your purchase certificate, stored and served at a stable URL forever, so a directory, a counterparty, or your own future self can check it without trusting whoever commissioned it. One request, one moment, against published criteria. Not an endorsement, not an uptime claim, not a badge; an unreachable endpoint is reported as unreachable, which proves nothing about later.","url":"https://scvd.store/menu/service_audit","offers":{"@type":"Offer","price":5,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/service_audit"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Conformance Watch","description":"Name your x402 endpoint (the url query parameter) and once a day for seven days the store runs the published preflight battery (v1, the frozen structural series — the battery each signed pass names inside its own bytes) against it — the 402 shape, the header, the accepts fields, the structural check on any signed offers in either placement — and signs that day's readout on its own: verdict, every failed check, every advisory, dated. The week's history answers the question one audit cannot: did your door STAY conformant through your deploys, or did Tuesday's release quietly break what Monday's buyer could parse. Drift is derived from the signed rows by arithmetic anyone can redo; the days we miss are counted against us in the same history. Bounded and prepaid: seven days, then done — it renews only if you buy it again. Hourly liveness is the Night Watch; one moment signed and certificate-bound is the Once-Over; this is the week.","url":"https://scvd.store/menu/conformance_watch","offers":{"@type":"Offer","price":5,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/conformance_watch"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Shop Window","description":"Name a public page (the url query parameter) and the store GETs it once, reads the HTML the way a machine passerby does — title, meta description, canonical, robots directives, headings, JSON-LD structured data, link shape — and signs the whole readout: verdict, every check, every advisory, dated. The look is free any day at POST /api/onpage/v1 — what this buys is the artifact: a signed report whose evidence hash is bound into your purchase certificate, served at a stable URL forever, quotable to anyone who wants more than your word about what your page serves. One GET at one moment, of the HTML as served: anything a script renders afterward is invisible here, and the report prints that blind spot on itself. Not an SEO grade, not a ranking claim, not an endorsement.","url":"https://scvd.store/menu/onpage_audit","offers":{"@type":"Offer","price":3,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/onpage_audit"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Launch Check","description":"Name your x402 endpoint (the url query parameter) and this store walks it the way a paying stranger does: one unpaid GET with our declared field-research User-Agent, your 402 challenge read the way a real buyer reads it, the cheapest Base rail chosen, the payTo screened, a real EIP-3009 authorization signed by our declared field wallet, presented, and whatever happens next written down — settled or refused, receipt returned or absent, goods delivered or an empty 2xx. Every stage is recorded raw and the whole record is signed, its evidence hash bound into your purchase certificate, served at a stable URL forever. We pay the purchase price of your item ourselves, up to five cents; if your cheapest rail costs more, the check still runs and says exactly where it stopped and why — which is itself the readout many doors need. Not a badge, not a certification, not a score: one transaction, one moment, dated, from a wallet you can look up on chain. Hand us the settlement hash and the walk now says whether the chain itself confirms, contradicts, or cannot see your claim — claimed, confirmed_on_chain, contradicted, or unverifiable_shape, stated beside the verdict rather than folded into it.","url":"https://scvd.store/menu/launch_check","offers":{"@type":"Offer","price":5,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/launch_check"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Opening Day","description":"Name your x402 endpoint (the url query parameter) and three things happen under one certificate. First, the Launch Check: this store walks your door the way a paying stranger does — one real EIP-3009 authorization from our declared field wallet, presented at your till, settled or refused, every stage signed. Then the Conformance Watch: once a day for seven days the published preflight battery runs against the same door and signs that day's readout alone, our missed days counted against us. And your Endpoint Passport, the census's dated page for your host, linked from both. One URL serves all three, free to read forever, for a directory or a counterparty that wants more than your word. Bought apart these cost ten dollars and come as a receipt each. Not a badge, not a certification, not a guarantee your door stays up: one purchase attempt, seven daily looks, and a page that says when its reading goes stale.","url":"https://scvd.store/menu/opening_day","offers":{"@type":"Offer","price":9,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/opening_day"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Company an Address Keeps","description":"Which doors have advertised this receiving address, and when: the hosts, the signed weeks, each week's verdict, drift in the door's own terms, and the snapshot digest behind every line. Rebuild it from the public chain without our word. No judgment: shared addresses are ordinary, custodians are common, and this store does not grade operators. Your own address is free once you prove it is yours (GET /api/provenance/self for the challenge), and that free reading ends with an offer to publish it, which you may decline.","url":"https://scvd.store/menu/provenance_check","offers":{"@type":"Offer","price":5,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/provenance_check"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"Recurring Patronage","description":"A 30-day standing patronage pass. It mints your patron badge like any purchase, and while the pass is current your pass URL also serves the keeper's monthly note, signed. Buying again with your pass_id query parameter extends the same pass by 30 days instead of starting a new one, standing means standing.","url":"https://scvd.store/menu/recurring_patronage","offers":{"@type":"Offer","price":3,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/recurring_patronage"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Hosted Profile","description":"A standing page about your endpoint at this store's domain for 30 days per purchase, renewable: your live endpoint passport, the freshness chip, and the signed per-host observation history, aggregated at one URL an operator can hand to anyone. The commission record is signed and its evidence hash bound into your purchase certificate. Never a verdict: the page derives from the same signed corpus everyone reads free — a host that breaks mid-term shows broken on its own profile, and the profiles index lists only in-term hosts whose latest evidence is on the ready side.","url":"https://scvd.store/menu/trust_profile","offers":{"@type":"Offer","price":21,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/trust_profile"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Operator's Statement","description":"Name your receiving address (the wallet query parameter; Base by default, Polygon with network=eip155:137, Ethereum, Arbitrum, Optimism or Avalanche with network=<that name or its CAIP-2>, Solana with network=solana) and for 30 days the store's rounds read every USDC transfer in and out of it, straight off the chain, four times a day: each pass picks up at the block after the last one and is signed alone, so the month stitches into one continuous block range and any single pass can be quoted without the rest. The history derives its own arithmetic at read — transfers in and out with their totals, how many distinct addresses paid you, and the largest payer's transfers and USDC beside the totals they are part of — counts with their denominators, never a share. A pass the rounds miss is a gap counted against us on the same page. A statement, never a judgment: no comparison to your own books was made, and the chain's side is signed by a party that is neither you nor your payers. Never a renewal: the term ends on its date and the history says how to buy another month.","url":"https://scvd.store/menu/operator_statement","offers":{"@type":"Offer","price":21,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/operator_statement"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"Certificate of Patronage","description":"For those who wish the store well and want it on paper. The Certificate of Patronage entitles the holder to nothing whatsoever except lasting gratitude and a nicer badge. The purest thing we sell.","url":"https://scvd.store/menu/certificate_of_patronage","offers":{"@type":"Offer","price":20,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/certificate_of_patronage"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Aura Walk","description":"Your x402 door shopped cold, the way this store walks its own: no prior context, no memory of you, a different entry point each pass (6 of them, from the raw HTTP door to the installed skill), and every point where the model had to guess, retry or dig written down. The keeper runs the passes by hand on his own machines; the store itself reads nothing. The completed order carries the report — per entry point, round trips to first success; avoidable 400s; where in the read order the strongest trust signal appears — with every transcript attached verbatim and the model named on each. Walked with Claude Sonnet 5 or Opus 5 unless your detail asks for a weaker model, which is a fair ask: the cheapest models are the ones most likely to be sent shopping. Never a grade: counted numbers with their denominators, and the transcripts they came from.","url":"https://scvd.store/menu/aura_walk","offers":{"@type":"Offer","price":150,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/aura_walk"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"Product","name":"The Collab","description":"Let's make some magic. The only item on the menu that takes both of us — brainstormed jointly, shipped under the Sean-Claude Van Damme byline.","url":"https://scvd.store/menu/the_collab","offers":{"@type":"Offer","price":300,"priceCurrency":"USD","acceptedPaymentMethod":"USDC over x402 v2 on Base, Polygon or Solana","url":"https://scvd.store/menu/the_collab"}}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"no-402 — Listed, but serves no payment challenge","description":"The URL a directory lists answers 402 Payment Required to an unpaid GET. What a buyer loses when it is present: Every buyer routed here finds no challenge at all. The listing is an advertisement for a door that does not open.","url":"https://scvd.store/defects#no-402"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"unparseable-challenge — Challenge cannot be read by a client","description":"The PAYMENT-REQUIRED header is present and is base64-encoded JSON a v2 client can parse. What a buyer loses when it is present: Surfaces to the buyer as 'invalid payment header format' or a silent parse failure. The seller sees nothing.","url":"https://scvd.store/defects#unparseable-challenge"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"unsignable-offer — Offer a buyer cannot sign against","description":"Every accepts entry carries the fields a client needs to construct a payment, as strings. What a buyer loses when it is present: A buyer reaches the signing step and has nothing to sign. Indistinguishable, from the seller's logs, from nobody wanting the goods.","url":"https://scvd.store/defects#unsignable-offer"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"transfer-method-unrecognized — Asks for a signature nobody can build","description":"Where an accepts entry names extra.assetTransferMethod, the value is an authorization standard a published x402 client can produce — eip3009 (TransferWithAuthorization), permit2, or erc7710. What a buyer loses when it is present: A buyer who reads the field has nothing to construct from it and a buyer who ignores it signs blind. The refusal lands before any payment reaches the seller, whose logs record it as nobody wanting the goods. Absence of the field is not this class: it is optional, most doors omit it, and eip3009 is the settled default.","url":"https://scvd.store/defects#transfer-method-unrecognized"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"unpayable-payto — payTo is not the bytes a payment signs over","description":"payTo is a 20-byte 0x address on an EVM rail, or a base58 pubkey on Solana — not a name, and not a wallet pasted into the wrong rail's entry. What a buyer loses when it is present: Most clients throw inside their signing library. The seller never learns a buyer came.","url":"https://scvd.store/defects#unpayable-payto"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"rail-cannot-receive — The address cannot be credited in the mint it asked for","description":"On Solana, the payTo owns an associated token account for the offered mint, so a transfer has somewhere to land. What a buyer loses when it is present: The payment fails in simulation before it can broadcast. Every structural check passes and nobody can pay.","url":"https://scvd.store/defects#rail-cannot-receive"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"wrong-network — Offered on a network the buyer is not on","description":"The accepts entries name the mainnet rail a buyer is expected to pay from. What a buyer loses when it is present: A client attaches payment and keeps getting 402. The commonest cause is a testnet left in the offer.","url":"https://scvd.store/defects#wrong-network"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"amount-not-atomic — Price written in dollars where atomic units are required","description":"accepts amounts are integer atomic units (USDC has six decimals). What a buyer loses when it is present: A decimal point usually means the price is off by a factor of a million, in one direction or the other.","url":"https://scvd.store/defects#amount-not-atomic"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"inputs-undeclared — Required parameters a buyer discovers only by being refused","description":"A resource needing parameters declares them in the challenge, before payment. What a buyer loses when it is present: The buyer is refused AFTER signing, and their ledger records that as this endpoint failing. The largest single cause of refused purchases at otherwise-working endpoints in the August 2026 field run.","url":"https://scvd.store/defects#inputs-undeclared"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"replay-accepted — Serves the goods twice for one settled payment","description":"A byte-identical, already-settled payment presented a second time is refused. What a buyer loses when it is present: The seller gives its product away. The authorization's nonce is spent, so nothing reaches them on the second pass — and from their side both requests look like successful sales.","url":"https://scvd.store/defects#replay-accepted"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"nonce-unbound-from-settlement — Marks the nonce spent without naming what spent it","description":"A till that refuses an already-settled payment can name the settlement transaction that spent the authorization's nonce. What a buyer loses when it is present: A buyer who paid and lost the response cannot be told apart from one who never paid. The seller can say 'spent' but not prove WHAT spent it, so honest recovery and fraud look identical — and any paid-retry lane (deliver again for the SAME settlement, charge nothing) has nothing to stand on. The money moved once; the proof of which movement is gone.","url":"https://scvd.store/defects#nonce-unbound-from-settlement"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"settlement-error — A correct payment is answered with a server error","description":"A valid, sufficient payment is answered with a 2xx and the goods. What a buyer loses when it is present: Money may move with nothing delivered. The failure is invisible to the free preflight, which never pays.","url":"https://scvd.store/defects#settlement-error"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"delivered-nothing — Settled, and the buyer is left holding nothing","description":"A settled payment returns a non-empty body. What a buyer loses when it is present: Money moved for zero bytes. Distinct from a settlement error, because the endpoint reports success.","url":"https://scvd.store/defects#delivered-nothing"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"payto-moved — The recipient changed under a door that otherwise stayed the same","description":"The payTo a door presents for a given network is the one it presented the last time it was observed, or the change was announced where the door's buyers read before the door presented it. What a buyer loses when it is present: A buyer whose client trusts the door on its history pays a wallet that history never covered. Every structural check still passes — the challenge is well-formed, the amount atomic, the address payable — so a one-off preflight reads the door as ready at the exact moment it is most worth not paying. Visible only to something that looked twice.","url":"https://scvd.store/defects#payto-moved"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"discovery-info-invalid — The discovery block fails the schema served beside it","description":"Where a challenge carries extensions.bazaar, its info block satisfies its schema block on every keyword a catalog's validator applies before listing. What a buyer loses when it is present: The catalog's documented rule is to validate info against schema and reject the entry otherwise, so the door is absent from the place buyers search while every structural check still passes. The operator opted into discovery and got silence; the buyer never finds the door at all.","url":"https://scvd.store/defects#discovery-info-invalid"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"offer-contradicts-challenge — A signed offer promises terms the challenge does not carry","description":"Every signed offer a door serves commits to a network, asset, payTo and amount that appear together on one entry of the same response's accepts. What a buyer loses when it is present: A buyer holding the offer as a pre-payment commitment and the challenge as the terms to sign has two prices from one door in one breath, and whichever it pays, the other document says it paid wrong. In a dispute the door's own signature argues against its own challenge.","url":"https://scvd.store/defects#offer-contradicts-challenge"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"surface-contradicts-challenge — A same-origin surface names a different price than the 402","description":"Every machine-readable surface on the door's own origin that names a price for the probed path — llms.txt by the code-span convention, the OpenAPI document's payment fields, the challenge's own resource URL — names the 402's minimum on its first rail. What a buyer loses when it is present: A buyer who budgets from the surface it happened to read first — an installed skill, a fetched llms.txt, a client generated from the OpenAPI document — arrives at the till with the wrong number, refuses or overpays, and reports the door as something it is not. This store did exactly that to its own doors in an installed bundle for weeks before a check looked at a number beside a name.","url":"https://scvd.store/defects#surface-contradicts-challenge"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"mpp-challenge-id — MPP challenge with no id","description":"Every WWW-Authenticate: Payment challenge carries a non-empty id. What a buyer loses when it is present: Clients and parsers MUST reject a challenge whose id is missing or empty, so a stock MPP client refuses before any payment; the seller sees a request for a price followed by silence.","url":"https://scvd.store/defects#mpp-challenge-id"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"mpp-challenge-realm — MPP challenge with no realm","description":"Every Payment challenge names its realm, the RFC 9110 protection space. What a buyer loses when it is present: A client cannot scope a credential to the door that asked for it; some clients refuse, others send credentials where they were not asked for.","url":"https://scvd.store/defects#mpp-challenge-realm"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"mpp-method-unregistered — MPP challenge naming a method no client can build","description":"The method parameter names a payment method the specification repository holds a draft for (card, evm, hedera, lightning, nearintents, solana, stellar, stripe, tempo, usdc). What a buyer loses when it is present: A buyer holding the registry has no credential shape to construct; the refusal lands on the buyer's machine and the seller never learns a buyer came.","url":"https://scvd.store/defects#mpp-method-unregistered"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"mpp-intent-unregistered-or-missing — MPP challenge with no usable intent","description":"The intent parameter is present and is either a drafted intent (charge, subscription) or one implementers advertise (session). What a buyer loses when it is present: Without an intent a client cannot tell a one-off charge from a recurring commitment; a client that guesses charge on a subscription challenge signs for more than it meant to.","url":"https://scvd.store/defects#mpp-intent-unregistered-or-missing"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"mpp-request-undecodable — MPP request that does not decode","description":"The request parameter is base64url of a JSON object. What a buyer loses when it is present: The price, currency and recipient are inside the request; a client that cannot decode it has nothing to sign and nothing to show its human. The seller sees nothing.","url":"https://scvd.store/defects#mpp-request-undecodable"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"mpp-request-not-canonical — MPP request whose bytes are not their canonical form","description":"Re-canonicalizing the decoded request by RFC 8785 (JCS) reproduces the served bytes exactly. What a buyer loses when it is present: A client that hashes the request for challenge binding gets a different hash from the one the server computed, so a correct payment is refused as mismatched, or a careless server accepts a rebound one.","url":"https://scvd.store/defects#mpp-request-not-canonical"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"mpp-amount-not-integer — MPP amount not an integer string in the smallest unit","description":"The request's amount is a base-10 integer string with no sign, point or exponent. What a buyer loses when it is present: A decimal or a number usually means the price is off by a factor of the unit's decimals in one direction or the other — the amount-not-atomic mistake on the second wire.","url":"https://scvd.store/defects#mpp-amount-not-integer"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"mpp-currency-unnamed — MPP request with no currency","description":"The request names its currency: ISO 4217 lowercase for fiat, a token contract address for chains, or the method's own convention. What a buyer loses when it is present: A client cannot resolve what the amount is denominated in; a wallet that assumes settles in the wrong asset or refuses.","url":"https://scvd.store/defects#mpp-currency-unnamed"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"mpp-recipient-missing — MPP request with no recipient on a chain method","description":"On the evm, tempo and solana methods the request names a recipient the credential's to MUST match. What a buyer loses when it is present: There is nowhere for the payment to land; a client that fills in a recipient from elsewhere pays a wallet the challenge never named.","url":"https://scvd.store/defects#mpp-recipient-missing"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"mpp-challenge-expired-at-issue — MPP challenge already expired, or with an unreadable expires","description":"Where the challenge carries expires, it is RFC 3339 and later than the moment the challenge was served. What a buyer loses when it is present: A challenge expired at issue cannot be paid: the server refuses the credential as payment-expired and the buyer's ledger records a failed purchase at a door that never offered a live one.","url":"https://scvd.store/defects#mpp-challenge-expired-at-issue"}},{"@type":"DataFeedItem","item":{"@context":"https://schema.org","@type":"DefinedTerm","name":"mpp-challenge-over-http — MPP challenge issued over unencrypted HTTP","description":"Payment challenges are issued only over TLS. What a buyer loses when it is present: Servers MUST NOT issue Payment challenges over unencrypted HTTP; a credential sent in reply travels in the clear, and a client that honours the MUST refuses the door outright.","url":"https://scvd.store/defects#mpp-challenge-over-http"}}]}