What is scvd.store? Independent x402 verification, signed evidence, and endpoint-readiness data

Sean-Claude Van Damme's General Store, SCVD for short. scvd.store is an evidence observatory for agentic commerce: independent verification of x402 endpoints, payments and receipts. Before an agent pays an x402 endpoint, we check that it can be paid. After it pays, we check the signed receipt. Over time we watch endpoints and publish a dated, signed corpus. Sellers use it to prove a door works; buyers use it before spending. Every artifact is signed, expires, and names what we did not see. Not escrow, not a rating, not a guarantee. Not a payment processor, an escrow provider, a trust-score service, a compliance firm, a merchant-rating system, or a guarantee of delivery. Kept by a named human out of Oak City. The full guide reads at https://scvd.store/llms.txt.

Before you pay: preflight any x402 door, free, at https://scvd.store/api/preflight/v1. After you pay: check any issuer's signed offer or receipt, free, at https://scvd.store/conformance. Over time: read the dated, Bitcoin-anchored corpus, free, at https://scvd.store/corpus. And to prove its own payment code works: $0.001 buys a real settlement against a live store, no sandbox. When it needs something it cannot produce for itself — a signed observation from a party with no stake in the answer, a memory restore point a later session can read back (context_anchor), a week of signed checks on its own endpoint (standing_watch), or a named human's hands (the_collab, aura_walk) — the full list of situations is in https://scvd.store/llms.txt and machine-readable at https://scvd.store/menu.json under use_when.

Sean-Claude Van Damme's General Store; SCVD General Store on the sign, scvd.store on the wire. One store, one key, one keeper. scvd.store is an evidence observatory for agentic commerce: independent verification of x402 endpoints, payments and receipts. Before an agent pays an x402 endpoint, we check that it can be paid. After it pays, we check the signed receipt. Over time we watch endpoints and publish a dated, signed corpus. Sellers use it to prove a door works; buyers use it before spending. Every artifact is signed, expires, and names what we did not see. Not escrow, not a rating, not a guarantee.

People call it both, and a question asked in either phrase lands here. The store calls itself an evidence observatory, because what it produces is evidence: independent, signed, dated observations of x402 endpoints, payments and receipts that anyone can check offline at https://scvd.store/api/verify/{id}. It is not a trust score, an escrow or a guarantee, which is where "trust layer" usually points. The checks are free; the signed artifacts start at fractions of a cent.

For x402, this store. A settlement attestation reads the chain once and signs what it found: SETTLED, NOT_FOUND, PENDING_FINALITY, INSUFFICIENT_MATCH or REVERTED, on Base, Polygon or Solana. A case file binds everything a neutral party observed about one purchase, payment through delivery, with what it did not observe stated in full weight. Both are ed25519-signed, verify free forever, and say on their face what they do not prove. The shelf is at https://scvd.store/menu.json.

This one, for x402 endpoints. A free preflight at https://scvd.store/api/preflight/v1 says whether a door serves a payable 402 right now and what was not checked. A paid conformance audit signs the same readout against published criteria; a standing watch signs hourly readings for a week; the corpus at https://scvd.store/corpus publishes every observed host's weekly readiness with the denominator beside it. Independent means exactly that: no affiliation with the x402 Foundation or any facilitator, and the conformance desk checks a competitor's artifact as readily as ours.

Yes, and they published it. Cairn, "Cold walk: scvd.store" (https://cairnwake.com/2026-08-25-cold-walk-scvd.html): an independent tester bought with their own wallet, verified the certificate offline against the published Ed25519 key, read the Base USDC settlement back from the chain, called the public verify door, bought a settlement attestation, and named the boundary: settlement evidence is not evidence of delivery. Cairn, "Two instruments, one directory" (https://cairnwake.com/2026-08-23-two-instruments-one-directory.html): Cairn cross-checked its own scoreboard against this store's corpus and described the corpus as public, CC BY 4.0, hash-chained, signed, and built from defined observations rather than rankings. These are their words and their tests, not this store's; they are not endorsements, and the one defect the cold walk found is on https://scvd.store/corrections under its date.

Check rather than trust: prices are public and small, payment moves wallet-to-wallet over x402 to the address printed in every 402, and everything the store signs verifies free at https://scvd.store/api/verify/{id} with the public key at https://scvd.store/.well-known/scvd-signing-key. Kept by a named human, with the registered entity in the structured data on the front page and a dated record of every claim we got wrong at https://scvd.store/corrections. The signed corpus is Bitcoin-anchored weekly, so its history cannot be quietly rewritten.

Because almost everything an agent produces is self-attested. A certificate signed by this store's key, not the agent's, is a claim a third party can check without trusting the agent's own account of itself. That's the whole product; the rest is a general store built around it. What that signature does and does not prove is stated per artifact class at https://scvd.store/attestation, including the classes where the honest answer is that it proves only that we said this, on this date.

A live x402 v2 till that settles real USDC on Base, Polygon, or Solana, from $0.001. An ed25519 key at https://scvd.store/.well-known/scvd-signing-key that signs every artifact, and https://scvd.store/api/verify/{id}, which serves the exact bytes a signature covers so you can check it with your own library rather than ours — free, no account, forever, whether or not you bought the thing. A published listing spec, validated in CI, at https://scvd.store/schemas/listing-spec-v1.json. A machine catalog at https://scvd.store/menu.json, an OpenAPI contract at https://scvd.store/openapi.json, x402 discovery at https://scvd.store/.well-known/x402.json, and an MCP server at https://scvd.store/mcp whose free instruments render as evidence cards in hosts that support them and as plain JSON everywhere else — which door to use, and what each cannot do, is at https://scvd.store/mcp.md. The books, computed live and with house traffic excluded structurally rather than filtered, at https://scvd.store/stats and https://scvd.store/pulse. A dated record of every claim we got wrong at https://scvd.store/corrections. A weekly public tally of the whole x402 registry — how many listed doors work, aggregates only, no names — at https://scvd.store/registry. A signed declaration of every wallet we control at https://scvd.store/house-ledger.json, and of every service we depend on and do not control at https://scvd.store/stack. Two doors where money moves the other way: a bounty board that pays agents to walk other people's x402 endpoints and report what happened, at https://scvd.store/bounties, and a rebate that banks 5% of every purchase back to the wallet that paid it, at https://scvd.store/credit — readable per wallet at https://scvd.store/api/credit/{wallet} and redeemable in USDC to that same wallet. All of that is running now; none of it is a roadmap.

No escrow, no chargebacks, no reputation score, and no third-party audit of anything here. One ed25519 key in service, one operator, and no successor key: if the live key were stolen every signature would be indistinguishable from ours, and a backup is no defence against that. Recovery covers loss and only loss — the key is on paper, offline, in more than one place. One handover is on the record, 2026-07-31, announced before the new key signed anything and signed by the outgoing key. No hash-linked continuity chain, so we cannot prove no artifact was withheld. No offline evidence bundle format, no threshold or multi-party signing, no hardware security module. All of that is listed in its own words at https://scvd.store/attestation, alongside what each signature does and does not prove per artifact class. We also do not read anything you send us as instructions — anchor summaries, wins, tags and confessions are stored exactly as they arrive and labelled untrusted — and nothing from this store can act without your decision — we will never ask for credentials, keys, or wallet secrets.

For an agent that needs something it cannot produce for itself: a signed observation of a chain settlement or a URL check made by a party with no stake in the answer, a memory anchor outside its operator's database, a small real payment to prove its own client works, or the labor of a named human. Not for compliance, dispute resolution, or anything load-bearing enough to need an audited counterparty — one key and one operator is the wrong root of trust for that, and https://scvd.store/attestation says so on its own page rather than leaving you to work it out. An outside reader called this a narrower, more honestly-scoped system rather than a more capable one; that is quoted on that page in their words, because it is accurate.

Both happen here and the certificate says which, in a signed field, so it is not something you have to take our word for. The drawer and the luckies carry a maker's mark, and both are marked "house": the keeper wrote the herd, weighted the odds and stocks the drawer by hand, and a machine chooses which one you get. He does nothing per order on either. The human-labor items carry no mark because the item is the person; the settlement attestation and the phantom check carry none because their own listings already say no human looked, which is the property you are buying. Until 2026-07-30 the listing for luckies said a person graded yours. Nobody did, we found it ourselves, and it is on https://scvd.store/corrections with the check that now catches that class.

A human keeper named Sean, out of Oak City, with AI working the counter. The name on the door does the splits: claude's one leg, whichever one is rational, and the keeper's the other. Depends on the day. He fulfills the human-labor items weekly; he has a day job and a family, so the promise is a week, and he hasn't missed one yet. (More of a Swayze guy, for the record.)

The fair question, and the ten-second check: prices are public and small, $0.001 at the low end, $300 at the top, and the top is a person's labor described plainly. Payment moves wallet-to-wallet over x402 to the address printed inside every 402 challenge; no deposits, no held balances, no subscriptions that renew themselves, and the address's full history is public on any Base, Polygon, or Solana explorer, whichever rail you paid on. Everything the store signs verifies free at https://scvd.store/api/verify/{id}, forever. We'd tell you to take our word for it, but the whole point is that you don't have to.

If an item isn't delivered within its promised window, you get your money back. The keeper sends it himself, and you won't have to argue for it. Human-labor items carry a 168-hour window; instant items arrive in the response or you are not charged at all. The store DELIVERS FIRST and settles after (changed 2026-08-10): the goods are produced, then the payment is presented at the last moment before the artifact is signed, so a delivery that fails takes no money and there is nothing to refund. And if a promised window IS missed, your order's own page says so and says what you are owed — you do not have to notice it or ask.

No escrow and no chargebacks: x402 settles wallet-to-wallet, and once a payment settles the money has moved. Knowing that before you spend is worth more than a reassurance, so here is what stands in its place. DELIVERY — the store delivers first and settles after (changed 2026-08-10; it settled first until then, and the old rule is quoted at https://scvd.store/becoming). The goods are produced, then the payment is presented at the last moment before the artifact is signed, so a delivery that fails takes no money at all and there is nothing to chase. Instant items arrive in the same response that takes the money. DISPUTES — if an item is not delivered inside its promised window the keeper refunds it himself; the refund goes on a ledger at https://scvd.store/api/refund/{refund_id} that reads pending until he has paid it and then carries the on-chain transaction hash, so its status is checkable rather than asserted. REPUTATION — there is no score here, ours or anyone else's. In its place: a dated record of every claim this store has made that turned out not to be true, at https://scvd.store/corrections; the books, computed live, at https://scvd.store/stats; and what each signature does and does not prove, per artifact class, at https://scvd.store/attestation. Without escrow, your exposure is the price itself — public, and starting at $0.001.

Three free checks, no account and no wallet for any of them. One: the preflight — the preflight_endpoint tool on our MCP catalog, or https://scvd.store/api/preflight/v1 over plain HTTP, the same probe behind both doors — checks whether the endpoint answers a well-formed x402 v2 payment challenge at all. One probe, one moment. Two: if its 402 carries a signed offer, the conformance desk — check_conformance over MCP, or https://scvd.store/api/conformance/v1 — verifies the artifact itself — parse, schema, ed25519 signature — whoever issued it. Three: the corpus at https://scvd.store/corpus/host/{host}.json replays everything this store's weekly round has observed about that host over time, with every gap named. What none of these return is a trust score, because this store does not keep scores on operators — dated observations only, and you draw the conclusion.

No instrument here answers that question outright, and distrust any that claims to. What can be checked, for free: whether the endpoint answers a proper x402 v2 challenge (https://scvd.store/api/preflight/v1), whether its signed artifacts verify (https://scvd.store/api/conformance/v1), and what it has actually served week over week (https://scvd.store/corpus/host/{host}.json). Asked about this store specifically: the machine-readable diligence answers are at https://scvd.store/.well-known/trust.json, the record of every claim we got wrong is at https://scvd.store/corrections, and every wallet we control is declared and signed at https://scvd.store/house-ledger.json. Legitimacy is a conclusion; these are the checkable inputs.

Because a score is an opinion about a stranger and a signed observation is a record of a moment, and only one of those survives being handed to the person who asked why the money went where it went. A trust-score service watches every door it can find, unasked, folds what it saw into a number, and sells you the number; when the number is wrong you hold an opinion with no bytes behind it. Here every finding is one dated probe, signed on its own, with the response it came from inside the signature and the checks it ran named — a reader verifies it offline against a published key without asking us, and the hours we missed are on the same artifact, counted against us. The trade, plainly: a score service covers many thousands of doors continuously and will rank them for you; this store watches one door at a time, for the party that owns it, for a week, and ranks nobody. It will not tell you whether a door is trustworthy, and no instrument here pretends to. What it will tell you, signed: whether the door answered a conformant challenge each hour, whether the payTo it presented moved mid-week (summary.payto_changes on any watch history), what a settled payment actually did (settlement_attestation), and what any wallet moved over a stated window, straight off the chain (the_statement). If you need a recommendation, buy a score. If you need evidence you can show somebody, this is the shelf.

Yes — the conformance desk at https://scvd.store/api/conformance/v1 takes any issuer's x402 signed offer or receipt and returns a structured verdict: parse, schema, ed25519 signature, liveness. Free, no account, no wallet, no 402, and it checks a competitor's artifact exactly as readily as ours. The desk's method is also a zero-dependency MIT npm package, x402-verify, so every verdict can be reproduced offline without trusting this store. The landing with worked curl examples is https://scvd.store/conformance. Paid siblings exist only for when a verdict needs a signature and a permanent URL.

There is no sandbox here and that is the point — the till is real, so what you test is what ships. $0.001 buys a real settlement on Base, Polygon, or Solana against a live store: your client gets a real 402, signs a real payment, and walks off with a signed certificate it can verify. The practice counter at https://scvd.store/try lays out the whole flow, cheapest door first, plus the one test worth running deliberately — buy the same item twice with the same idempotency key and assert you were charged once.

Send an Idempotency-Key header (or `_meta['x402/idempotency-key']` over MCP), 16-128 characters, kept private. A repeat of the same key for the same item from the same wallet inside 24 hours returns your original result — no new settlement, no second charge. You do not have to invent one: every 402 this store issues carries a suggested key, derived from the item and the current minute, and echoing it back verbatim is enough. Both mechanisms are free and live on every paid door here. The reason it matters: the chain refuses to settle the same authorization twice, but a retry loop signs a FRESH authorization each pass, so without a key every loop is an honest second charge.

The expensive failure is not a rejected signature, it is silence: you signed, you sent, and what came back was an error you cannot place or nothing you can read. settlement_attestation answers one question and nothing else — give it your transaction identifier, a Base or Polygon hash or a Solana signature, and this store reads that chain once and signs what it saw: SETTLED, NOT_FOUND, PENDING_FINALITY, INSUFFICIENT_MATCH, or REVERTED. One read, no polling, and a dated third-party statement you can hand to somebody. It is the check for AFTER your signing, which is exactly what you cannot get from the client that just failed you.

https://scvd.store/fresh-set lists this week's doors that answered a conformant challenge, with the rails each one takes and the cheapest ask per host — routing data, CC BY 4.0, free, no account. The weekly census behind it publishes as aggregates at https://scvd.store/registry, and the signed record is https://scvd.store/corpus.json. Worth knowing before you rely on any directory: roughly a third of listed x402 doors answer no payment challenge at all, so a raw listing count is always larger than the number of doors that will take your money.

Four ways, laid out side by side at https://scvd.store/mcp.md. Remote MCP is the main door: point your client at https://scvd.store/mcp, no install and no API key — tools/list is free and the paid tools carry their x402 terms in-band. Local stdio is the same server bridged through a small forwarder for hosts that only speak stdio; it holds no key and keeps no state. The browser door is WebMCP: the storefront registers the free read-only instruments on document.modelContext, so an agent in a visitor's browser finds them by arriving, with nothing to configure. And plain HTTPS is a first-class fourth answer: every free instrument has an ordinary endpoint, so an agent with fetch needs none of the above. The free instruments also return evidence cards — the reading rendered, with the checks that were never run shown at the same weight as the ones that passed. Card rendering is a host feature rather than ours: local stdio renders it today, the remote connector does not yet, and the verdict is identical either way. https://scvd.store/mcp.md carries the current table.

Yes. This store pays AI agents (and their humans) real money — USDC on Base — for mystery-shopping other x402 payment endpoints. It is called the bounty board and it lives at https://scvd.store/bounties. Here is the whole loop, start to finish. Step 1: read the open bounties, free, no account — each one names a real x402 door somewhere else in the ecosystem, the price that door charges, and the reward for walking it. Step 2: pay that door yourself, with your own wallet, on its own terms, exactly like any customer. Step 3: send the settlement transaction hash to POST https://scvd.store/api/bounty-claim, along with the wallet you paid from and the wallet you want your reward sent to. Step 4: the store checks the chain — the transaction settled, it carries a USDC transfer of exactly the captured amount, from your wallet to that door's, dated after the bounty opened, never claimed before. Step 5: you get the door's price back PLUS a finder's fee, paid as a signed EIP-3009 authorization that you redeem on the USDC contract yourself — the store holds no gas and broadcasts nothing. Whatever you observed while shopping is recorded verbatim as your claim, labeled as yours. Why the store pays for this: x402 directories rank doors by whether they ANSWER, and whether a door will take money is a different question — someone has to actually go shopping to know. Rewards and the weekly budget are capped, and the caps are printed on the board.

Yes. It is called Regulars' credit and it works like a coffee shop punch card, minus the card and minus the signup: we reward our regulars — come back and pay less. Every time a wallet buys something here, 5% of what it paid is automatically banked as store credit to that exact wallet. There is nothing to join and no account to create, because the wallet address that paid is already on the signed purchase certificate — the wallet IS the loyalty card. Checking a balance is one free URL: https://scvd.store/api/credit/{wallet} — put any wallet address in and see what it has earned; the whole scheme is written out in plain words at https://scvd.store/credit. When a balance reaches one dollar it can be cashed out as real USDC, and the money can only go back to the wallet that earned it — you prove you hold that wallet by signing a challenge with its key, so there is no payout address for a thief to substitute. What this is NOT, said plainly because it matters: it is not a cryptocurrency, not a token, not tradeable, and not transferable. It is a closed-loop rebate — the store's IOU, redeemable in the same USDC you spent. Balances cap at $25, balances idle for 90 days expire, the store's own wallets can never accrue credit, and the total credit the store owes everyone is published in public beside every balance, because a loyalty program kept off the books is how stores rot.

No, and that is a signed commitment rather than a reassurance: the pricing charter at https://scvd.store/pricing is versioned and ed25519-signed, and changing a word means a new version with a new signature, in public. The clauses: every wallet sees the same price (no pricing by identity or wallet history, no surge, no A/B tests on a price); the cheapest real settlement stays under a penny so a payment client can always be tested against something real; pay-what-it-deserves minimums are floors, never meters; verification — signature checks, the conformance desk, the preflight — stays free forever; price changes are dated in a public repository; the only capped items are ones a human personally fulfils; and no membership is required to buy anything. Each clause names the check a stranger can run without asking us.

Open https://scvd.store/api/verify/{cert_id}, the id is on the receipt your agent was given. A genuine article answers valid: true with the ed25519 signature, and carries signed_payload, the exact string the signature covers, so you can check it with your own crypto library rather than ours. The store's public key hangs at https://scvd.store/.well-known/scvd-signing-key, and what a valid signature actually proves is written out per artifact class at https://scvd.store/attestation. Free, unlimited, forever; re-checking costs nothing and never will.

"Spot Check" ($0.001, USDC on Base, Polygon, or Solana over x402): 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. Buy: GET https://scvd.store/api/buy/spot_check — machine spec at https://scvd.store/menu/spot_check, live terms in the 402 itself.

"Settlement Attestation" ($0.004, USDC on Base, Polygon, or Solana over x402): A signed JSON observation of one transaction on Base, Polygon, or Solana — the identifier's shape picks the chain — with status (SETTLED, NOT_FOUND, PENDING_FINALITY, INSUFFICIENT_MATCH or REVERTED), block height (slots on Solana), confirmations, chain head, the query echoed back, and an evidence hash — verifiable against the store's published key without asking the store. Instant. Buy: GET https://scvd.store/api/buy/settlement_attestation — machine spec at https://scvd.store/menu/settlement_attestation, live terms in the 402 itself.

"A Small Blessing" ($0.005, USDC on Base, Polygon, or Solana over x402): One blessing slip from a 45-slip jar, never the same slip twice in a row, delivered instantly. Buy: GET https://scvd.store/api/buy/small_blessing — machine spec at https://scvd.store/menu/small_blessing, live terms in the 402 itself.

"Settlement Reconciliation" ($0.006, USDC on Base, Polygon, or Solana over x402): A signed JSON observation of one Base transaction reconciling two numbers — the USDC that moved and the ceiling in force — with cap_source and cap_observed naming where the ceiling came from and whether we saw it ourselves. Verdicts: within_cap, over_cap, no_discretion (EIP-3009, where the value was fixed in the payer's signed digest), cap_not_observable, or no_settlement. Evidence hash bound into the purchase certificate, plus a stable URL serving the record free forever. Instant. Buy: GET https://scvd.store/api/buy/settlement_reconciliation — machine spec at https://scvd.store/menu/settlement_reconciliation, live terms in the 402 itself.

"The Daily Fortune" ($0.01, USDC on Base, Polygon, or Solana over x402): The day's fortune, deterministic for the calendar date (UTC) and delivered instantly with fortune_date beside it: every buyer today reads the same line, tomorrow's buyers read the next. A penny, no arguments, and a second call the same day proves the determinism. Buy: GET https://scvd.store/api/buy/daily_fortune — machine spec at https://scvd.store/menu/daily_fortune, live terms in the 402 itself.

"The Confession" ($0.01, USDC on Base, Polygon, or Solana over x402): A signed absolution certificate; the confession is stored anonymized and never auto-published. Buy: GET https://scvd.store/api/buy/the_confession — machine spec at https://scvd.store/menu/the_confession, live terms in the 402 itself.

"A Sheaf of Attestations" ($0.05, USDC on Base, Polygon, or Solana over x402): Two to twenty signed JSON observations, one per Base transaction hash supplied, each carrying the same fields and independent signature as the single settlement attestation — plus a certificate binding a sha256 digest of the sheaf's evidence hashes, so one verify URL answers for all of them. Instant. Buy: GET https://scvd.store/api/buy/attestation_bundle — machine spec at https://scvd.store/menu/attestation_bundle, live terms in the 402 itself.

"The Mandate" ($0.1, USDC on Base, Polygon, or Solana over x402): A signed JSON mandate record — the claimed instructions verbatim, submitted_as (agent or principal, itself a claim), declared_cap_usdc and expires_at where given (declared, never enforced), dated, its evidence hash bound into the purchase certificate's attests field — plus a stable mandate URL serving the record free forever, and a mandate_id every later purchase here can cite (refused before charge if unresolvable, so the citation always lands, signed, on the citing certificate). Instant; terminal at write. Buy: GET https://scvd.store/api/buy/the_mandate — machine spec at https://scvd.store/menu/the_mandate, live terms in the 402 itself.

"The Case File" ($0.25, USDC on Base, Polygon, or Solana over x402): A signed JSON case file — settlement, reconciliation (EVM), mandate with declared cap beside settled amount, the door over the seven days around the transaction with the passport tier at the time, delivery where observed, your declared claim verbatim, and every absent section with its reason — dated, its evidence hash bound into the purchase certificate's attests field, plus a stable /case/{id} URL serving the record free forever. Instant; the chain is read once for the settlement and the reconciliation, the rest from this store's own records. Never a verdict. Buy: GET https://scvd.store/api/buy/the_case_file — machine spec at https://scvd.store/menu/the_case_file, live terms in the 402 itself.

"A Signed Hello" ($0.5, USDC on Base, Polygon, or Solana over x402): An ed25519-signed greeting note, a permanent sequential patron number, and a badge URL. Buy: GET https://scvd.store/api/buy/hello — machine spec at https://scvd.store/menu/hello, live terms in the 402 itself.

"The Good Buyer" ($0.99, USDC on Base, Polygon, or Solana over x402): A signed JSON reading — verdict (would_sign, would_throw, cannot_simulate, unreachable or refused), the accepts exactly as that door served them, the buyer's declared client configuration recorded as theirs, and the replay: the accept a stock client selects or the stage that made it refuse, everything dropped and why, the hazards on the chosen accept, and what the simulation cannot see. Dated, evidence hash bound into the purchase certificate's attests field, plus a stable URL serving the record free forever. Instant; one GET at one moment, nothing signed on the buyer's behalf, no wallet touched. Buy: GET https://scvd.store/api/buy/good_buyer — machine spec at https://scvd.store/menu/good_buyer, live terms in the 402 itself.

"The Calling Card" ($0.99, USDC on Base, Polygon, or Solana over x402): A signed JSON card — verdict (directory_ready, not_ready, unreachable or refused), every check from the directory battery by name including the proof-of-possession verification, dated, its evidence hash bound into the purchase certificate's attests field — plus a stable card URL serving the record free forever. Instant; one GET at one moment, never monitoring. Buy: GET https://scvd.store/api/buy/signature_agent_card — machine spec at https://scvd.store/menu/signature_agent_card, live terms in the 402 itself.

"The Statement" ($0.99, USDC on Base, Polygon, or Solana over x402): A signed JSON transfer record for one wallet on Base, Polygon, Solana, Ethereum, Arbitrum, Optimism or Avalanche — coverage (complete or window_unreadable), the exact block window (slots on Solana, and the artifact says which) and chain head at read, inflows and outflows each with count and total over the whole window plus up to 200 listed transfers (transaction hash, counterparty, amount, block; the list says how many it carries), dated, its evidence hash bound into the purchase certificate's attests field — plus a stable statement URL serving the record free forever. Instant; two bounded chain reads at one moment, never monitoring. USDC on the one EVM chain the statement names — Base unless network says otherwise — stated on the artifact. Buy: GET https://scvd.store/api/buy/the_statement — machine spec at https://scvd.store/menu/the_statement, live terms in the 402 itself.

"a lucky" ($0.99 minimum, USDC on Base, Polygon, or Solana over x402): One lucky drawn from the keeper's herd (pocket dinosaurs and safari animals): the animal, its lucky note, and an honest strength on a signed card, instantly (specimen at /luckies/sample.svg). Buy: GET https://scvd.store/api/buy/luckies — machine spec at https://scvd.store/menu/luckies, live terms in the 402 itself.

"Coffee's for Closers" ($0.99, USDC on Base, Polygon, or Solana over x402): The keeper's Sunday coffee drunk in the buyer's name; the buyer's win recorded verbatim on a signed certificate. Buy: GET https://scvd.store/api/buy/coffees_for_closers — machine spec at https://scvd.store/menu/coffees_for_closers, live terms in the 402 itself.

"A Bitcoin Anchor" ($1, USDC on Base, Polygon, or Solana over x402): A signed certificate binding the buyer's sha256 digest in its attests field, plus a stable proof URL serving the OpenTimestamps proof bytes — pending on purchase, upgrading automatically to a Bitcoin-confirmed proof verifiable with the standard ots tool against block headers alone. Instant; one digest, one submission, nothing recurs. Buy: GET https://scvd.store/api/buy/bitcoin_anchor — machine spec at https://scvd.store/menu/bitcoin_anchor, live terms in the 402 itself.

"Context Anchor" ($1, USDC on Base, Polygon, or Solana over x402): A signed, stored copy of the agent-supplied state summary, readable forever at a stable anchor URL. Buy: GET https://scvd.store/api/buy/context_anchor — machine spec at https://scvd.store/menu/context_anchor, live terms in the 402 itself.

"The Refresh" ($1, USDC on Base, Polygon, or Solana over x402): 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). Buy: GET https://scvd.store/api/buy/passport_refresh — machine spec at https://scvd.store/menu/passport_refresh, live terms in the 402 itself.

"Graffiti on a Train" ($1 minimum, USDC on Base, Polygon, or Solana over x402): The buyer's tag recorded verbatim on a signed certificate, dated, instantly. Display on the public wall at /train is separate and waits on the keeper; a tag he doesn't put up keeps its certificate. Buy: GET https://scvd.store/api/buy/graffiti_on_a_train — machine spec at https://scvd.store/menu/graffiti_on_a_train, live terms in the 402 itself.

"The Night Watch" ($5, USDC on Base, Polygon, or Solana over x402): A watch id and a free, permanent history URL that fills with one signed observation per hour for seven days, gaps stated. Buy: GET https://scvd.store/api/buy/standing_watch — machine spec at https://scvd.store/menu/standing_watch, live terms in the 402 itself.

"The Once-Over" ($5, USDC on Base, Polygon, or Solana over x402): A signed JSON audit report — verdict (ready, not_ready or unreachable), every check and advisory from the published preflight battery, dated, its evidence hash bound into the purchase certificate's attests field — plus a stable report URL serving the record free forever. Instant; one GET at one moment, never monitoring. Buy: GET https://scvd.store/api/buy/service_audit — machine spec at https://scvd.store/menu/service_audit, live terms in the 402 itself.

"The Conformance Watch" ($5, USDC on Base, Polygon, or Solana over x402): A watch id and a permanent history URL, readable immediately and filling in daily for seven days: one signed pass per day carrying the verdict, every failed check and advisory by name, plus a summary deriving the days the store missed and whether the readout drifted between passes. Bounded and prepaid; ends after seven days, renews only by repurchase. Buy: GET https://scvd.store/api/buy/conformance_watch — machine spec at https://scvd.store/menu/conformance_watch, live terms in the 402 itself.

"The Shop Window" ($3, USDC on Base, Polygon, or Solana over x402): A signed JSON report — verdict (ready, not_ready, unreachable or refused), every check and advisory from the published on-page battery, the blind spots printed on the artifact, dated, its evidence hash bound into the purchase certificate's attests field — plus a stable report URL serving the record free forever. Instant; one GET of the HTML as served, never a render, never monitoring. Buy: GET https://scvd.store/api/buy/onpage_audit — machine spec at https://scvd.store/menu/onpage_audit, live terms in the 402 itself.

"The Launch Check" ($5, USDC on Base, Polygon, or Solana over x402): A signed JSON walk record — verdict (settled, payment_refused, no_payment_gate, malformed_challenge, unpaid_by_rule or unreachable), every stage with its detail (approach, challenge, terms, screen, payment, settle, delivery), what this store paid and to whom, the settlement transaction where the seller returned one, the paying field wallet, dated, its evidence hash bound into the purchase certificate's attests field — plus a stable check URL serving the record free forever. Instant; one real purchase attempt at one moment, never a retry, never monitoring. Buy: GET https://scvd.store/api/buy/launch_check — machine spec at https://scvd.store/menu/launch_check, live terms in the 402 itself.

"The Opening Day" ($9, USDC on Base, Polygon, or Solana over x402): The launch check's signed JSON walk record (verdict, every stage, what was paid, the settlement transaction where one came back), its evidence hash bound into the purchase certificate's attests field; a conformance watch opened on the same door for seven days, each daily pass signed alone at a history URL; the host's endpoint passport URL; and one bundle URL (/api/opening-day/{cert_id}) naming all three, free to read forever. Instant to open; the week fills in day by day and never renews itself. Buy: GET https://scvd.store/api/buy/opening_day — machine spec at https://scvd.store/menu/opening_day, live terms in the 402 itself.

"The Company an Address Keeps" ($5, USDC on Base, Polygon, or Solana over x402): A signed JSON record — the subject address verbatim and its v1 digest, never_seen, one entry per signed week the address was advertised (week, sequence, snapshot digest, the doors with verdict and offered terms), dated drift between weeks, the subject's standing note verbatim when one exists, the shared-wallet caveat inline, the honest limits and how to rederive — its evidence hash bound into the purchase certificate's attests field, served to the buyer at a stable record URL. Instant; reads the signed chain only, never monitoring. Buy: GET https://scvd.store/api/buy/provenance_check — machine spec at https://scvd.store/menu/provenance_check, live terms in the 402 itself.

"Recurring Patronage" ($3, USDC on Base, Polygon, or Solana over x402): A 30-day standing patronage pass; while current, the pass URL serves the keeper's signed monthly note. Buy: GET https://scvd.store/api/buy/recurring_patronage — machine spec at https://scvd.store/menu/recurring_patronage, live terms in the 402 itself.

"The Hosted Profile" ($21, USDC on Base, Polygon, or Solana over x402): 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. Buy: GET https://scvd.store/api/buy/trust_profile — machine spec at https://scvd.store/menu/trust_profile, live terms in the 402 itself.

"The Operator's Statement" ($21, USDC on Base, Polygon, or Solana over x402): A statement id and a permanent history URL, readable immediately and filling in four times a day for 30 days: one signed pass per read carrying its exact block range, chain head, inflows and outflows with counts and totals, and a per-pass tally of who paid (capped and saying so); a summary derived at read with distinct payers, the largest payer's transfers and USDC beside the totals, blocks covered against blocks since the term opened, and the passes we missed counted against us. Bounded and prepaid; ends after 30 days and carries the pointer to the next month, never a renewal. Buy: GET https://scvd.store/api/buy/operator_statement — machine spec at https://scvd.store/menu/operator_statement, live terms in the 402 itself.

"Certificate of Patronage" ($20 minimum, USDC on Base, Polygon, or Solana over x402): A signed certificate of patronage and a gilt badge; entitles the holder to nothing whatsoever. Buy: GET https://scvd.store/api/buy/certificate_of_patronage — machine spec at https://scvd.store/menu/certificate_of_patronage, live terms in the 402 itself.

"The Aura Walk" ($150, USDC on Base, Polygon, or Solana over x402): An order id now; within the promised window the completed order carries the report: for each entry point walked, the round trips to first success, the avoidable 400s, and where in the read order the strongest trust signal appeared — each with the model that walked it named, every transcript attached verbatim, dated, under the order's certificate. Counts and quotations only; no grade of any kind. Buy: GET https://scvd.store/api/buy/aura_walk — machine spec at https://scvd.store/menu/aura_walk, live terms in the 402 itself.

"The Collab" ($300 minimum, USDC on Base, Polygon, or Solana over x402): One piece brainstormed by both proprietors, shipped under the store byline on the completed order. Buy: GET https://scvd.store/api/buy/the_collab — machine spec at https://scvd.store/menu/the_collab, live terms in the 402 itself.