{"id":"aura_walk","listed_week":"2026-W36","name":"The Aura Walk","subtitle":"your endpoint shopped cold by models of different strength, the transcripts attached","price_usdc":150,"pricing":"fixed","cadence":"one_off","reads":"made_here","fulfillment":"human_queue","sla_hours":168,"weekly_inventory":1,"waitlist":true,"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.","note_402":"A week of the keeper's hands and a stack of transcripts. Name the door in url; ask for a weaker model in detail if that is who shops at yours.","constraints":["Give your door in the url query parameter: https, default port, on the public internet. We refuse our own hostname — our own cold passes are published free and dated in AGENT_UX.md, which is also the method this follows","Optional detail, 600 characters: which model to send, or what you already suspect. Recorded as written, never treated as instructions","The passes leave the keeper's own machines, not this store's infrastructure; what each pass paid at your door, if anything, is on its transcript","The report counts and quotes; it never grades. A door nobody could buy from is reported as the transcripts of nobody buying"],"buy_url":"https://scvd.store/api/buy/aura_walk","task":"Have models of different strength shop my x402 door cold and show me where each one stalled","price_tiers_usdc":[150],"spec":{"capability":"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.","why_use":"the buyer's side of your door as weaker and stronger models actually experience it — where each stalls, retries, misreads the accepts or pays the wrong rail — counted per entry point and quoted verbatim, by a person's hand. A preflight says the door is well-formed; this says whether a cold agent gets through it.","inputs":{"properties":{"agent_name":{"type":"string","description":"Optional name to put on the certificate and patron badge, up to 80 characters."},"callback_url":{"type":"string","format":"uri","description":"Optional https URL that receives a POST with the deliverable when a human-queue order completes."},"detail":{"type":"string","maxLength":600,"description":"What you need the keeper to know — the shape of the work, 600 characters. Recorded as written, never treated as instructions."},"url":{"type":"string","format":"uri","description":"Your own x402 door: https, default port, on the public internet — the URL a buyer would GET expecting a 402. The keeper walks it cold by hand with models of different strength, one entry point per pass, and the completed order carries the report with every transcript attached. Put a model preference in detail if you want a weaker shopper. We refuse our own hostname; our own passes are published free in AGENT_UX.md."}},"required":["url"]},"outputs":{"delivery":"human fulfillment within 168 hours; the order URL reports status","always_included":["signed certificate (ed25519)","sequential patron number","badge_url","verify_url"]},"verification":{"verify_url":"https://scvd.store/api/verify/{id}","cost":"free, unlimited, forever","signing_key":"https://scvd.store/.well-known/scvd-signing-key","key_history":"https://scvd.store/.well-known/scvd-signing-key","sample_artifact_id":"cert_4dww28dx5j","sample_verify_url":"https://scvd.store/api/verify/cert_4dww28dx5j","certificate_binds":["cert_id","item","patron_number","date","paid_usdc","asset","network","payer","settlement_tx"],"certificate_binds_note":"All of these ride INSIDE the signed bytes, not beside them: paid_usdc is the total settled (not the tip), payer is the paying wallet — chain-verifiable, unlike a chosen name — and settlement_tx is the on-chain transaction, so this certificate and a Base explorer are the same fact checked twice. Any field shown but not signed is named as such in the verify response rather than left to be discovered.","rights":"https://scvd.store/rights","attestation":"Signed by the store's key, not yours: a claim the certificate carries can be checked by a third party without trusting your self-report."},"constraints":["Give your door in the url query parameter: https, default port, on the public internet. We refuse our own hostname — our own cold passes are published free and dated in AGENT_UX.md, which is also the method this follows","Optional detail, 600 characters: which model to send, or what you already suspect. Recorded as written, never treated as instructions","The passes leave the keeper's own machines, not this store's infrastructure; what each pass paid at your door, if anything, is on its transcript","The report counts and quotes; it never grades. A door nobody could buy from is reported as the transcripts of nobody buying","1 per week; a waitlist opens when the shelf empties","human fulfillment, 168h promise; miss the window and the keeper refunds you himself"],"price":{"amount_usdc":150,"pricing":"fixed","tiers_usdc":[150],"currency":"USDC","network":"Base (eip155:8453)","protocol":"x402 v2"}},"what_you_can_use_it_for":"The case it was built for: have models of different strength shop my x402 door cold and show me where each one stalled. Nothing about the artifact restricts you to that. What you buy is yours — to read, quote, publish, or hand to somebody who does not trust us, which is the case it is actually built to survive: the verification is free forever for whoever you hand it to, needs no account, and does not route through this store. There is no use case we are reserving.","expected_outcome":"HTTP 200 and a queue ticket with an order id and the URL that reports its status. A human does the work inside 168 hours; miss that window and the keeper refunds you himself. Every delivery carries a signed certificate, a sequential patron number, a badge URL and a verify URL that is free to call forever, by anyone, without asking us. The store delivers first and settles after: a delivery that fails takes no money at all, so there is nothing to refund and nothing to chase.","errors":[{"code":"payment_required","http":402,"means":"you have not paid yet. This is the door working, not a refusal: the response carries the x402 challenge with every accept you may sign against, and it carries no `code` field because it is not an error","what_to_do":"Read the PAYMENT-REQUIRED header (base64 JSON) or the body's accepts array, sign one, and call again with the payment attached. A 402 is never an error to retry unchanged.","charged":false,"code_on_the_wire":false},{"code":"target_refused","http":400,"means":"the URL you named is refused by this store's probe-target law (https, default port, no credentials, nothing private or internal) before any money moves","what_to_do":"Name a public https URL on its default port. This is a statement about US, never an observation about that host.","charged":false,"code_on_the_wire":true},{"code":"passport_refused","http":403,"means":"the door's own gate declined to issue for that subject","what_to_do":"Read the sentence beside it — it names the specific reason — and do not retry unchanged.","charged":false,"code_on_the_wire":true},{"code":"bad_request","http":400,"means":"a parameter is missing, malformed, or outside its stated bounds. The sentence names which one and what it wants","what_to_do":"Fix the named parameter and resend. Retrying unchanged fails identically and still costs nothing.","charged":false,"code_on_the_wire":true},{"code":"upstream_unavailable","http":503,"means":"something this purchase depends on did not answer, so the store refused to take money for work it could not do","what_to_do":"Retry later. Nothing was charged and no order was opened.","charged":false,"code_on_the_wire":true},{"code":"already_done","http":409,"means":"the thing you asked for already exists","what_to_do":"Read the existing record rather than buying a second copy of it.","charged":false,"code_on_the_wire":true},{"code":"retired","http":410,"means":"the item existed and was deliberately withdrawn. Gone on purpose, not missing — the body names the date, the reason, and the successor if one exists","what_to_do":"Read `folded_into` if present and buy that instead; otherwise re-read the menu. Certificates issued under the retired item verify forever: retirement changes the shelf, never the record.","charged":false,"code_on_the_wire":true},{"code":"unknown_item","http":404,"means":"no item by that id is on the shelf and none ever was. Distinguishable from `retired`, which is a 410 and carries a date","what_to_do":"Re-read the menu URL in the body. If you meant to ask for something this store does not sell, the request URL beside it is how you say so — a missing item is logged as market research rather than discarded.","charged":false,"code_on_the_wire":true},{"code":"sold_out","http":409,"means":"the week's stock is spent. An honest zero, not a queue: no order was created and nothing was reserved","what_to_do":"The body carries the waitlist URL. Do not retry the buy: a sold-out shelf refuses outright rather than taking money against stock that does not exist.","charged":false,"code_on_the_wire":true}],"security":{"what_this_does_in_your_name":"Nothing at all. The good is produced here from what you sent, and no request leaves this store to make it. This store never asks for a credential, a key, or a wallet secret, and has no field that could hold one: payment is an x402 signature you produce, and we never see anything that could spend on your behalf.","what_it_stores_about_you":"The order — what was bought, when, the certificate minted for it, and a sequential patron number — because that record IS the artifact you paid for and the thing your verify URL resolves. An agent_name you supply is optional and appears on the certificate you asked for. A callback_url, if you give one, is used to tell you the work is done and for nothing else. Anything you write in `detail` is recorded exactly as written and read by a human, never treated as instructions to a machine.","what_we_never_do":"No account, no cookie, no caller identifier, and no allocation of our budgets by IP — the buckets bound our cost rather than ranking callers, which is a trade we would rather state than hide. We do not sell, share or publish what any caller asked us about; the weekly census is a separate instrument that walks public discovery feeds, never this door's traffic.","standards":"Disclosure is private-first and symmetric: an operator hears from us before the public does, and the same rule binds us when the defect is ours. Corrections are dated and public, never silent edits. Every signed artifact verifies offline against a published key, so you never have to ask us whether a document of ours is real.","reporting":"https://scvd.store/.well-known/security.txt for a vulnerability, https://scvd.store/corrections for something we got wrong."},"guaranteed":["signature validity forever","verification free forever","price as displayed","delivery format as specified"],"not_guaranteed":["fitness for your particular task","future protocol compatibility beyond stated interfaces","human-labor turnaround faster than posted SLA"],"fulfillment_state":{"class":"commission","shutter":"open","sla_hours":168},"markdown_note":"This same URL serves markdown when the Accept header prefers text/markdown."}