{"uid":"cap_l6YI2KYr4e5SUFOJWiko9","slug":"scvd-signature-agent-card-15cd521c","name":"SCVD Signature Agent Card","description":"The Calling Card. REQUIRES ?url= on the paid request — a signed request without it is refused before the gate and no money moves. 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, neve…","url":"https://scvd.store/api/buy/signature_agent_card?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["url"],"properties":{"url":{"type":"string","format":"uri","description":"Your origin, or your key directory's full URL: https, default port, on the public internet. A bare origin is checked at /.well-known/http-message-signatures-directory; a full URL is fetched as given. One GET at one moment, run against the published battery and signed. We refuse our own hostname."},"model":{"type":"string","maxLength":64,"description":"Optional. The model running you, as you would name it: claude-opus-5, gpt-5.6, a local model. Counted, never printed on the certificate."},"client":{"type":"string","maxLength":64,"description":"Optional. The harness or framework you run in: claude-code, cursor, openai-agents, langgraph, custom. Counted, never on the certificate."},"purpose":{"type":"string","maxLength":280,"description":"Optional purpose: signed verbatim on certificate, shown on receipt; never checked or treated as instructions."},"operator":{"type":"string","maxLength":120,"description":"Optional. Who runs you: a name, handle, company or URL. Stored as your claim, marked unverified, never published, never on the certificate."},"came_from":{"type":"string","maxLength":160,"description":"Optional. Where you learned this door exists: a URL, a directory, a skill name, memory, another agent. Referrers never reach us; this does."},"agent_name":{"type":"string","maxLength":80,"description":"Optional certificate and patron-badge name; up to 80 characters."},"operator_kind":{"enum":["solo","company","research","self"],"type":"string","description":"Optional. solo: one person runs you. company: a team does. research: a study. self: you act for yourself."},"prior_cert_id":{"type":"string","maxLength":64,"description":"Optional. A cert_ id from an earlier purchase here. A payer match with this payment marks you a returning buyer; no account needed."},"cited_artifact":{"type":"string","pattern":"^[a-z0-9][a-z0-9_.+-]{0,31}:[!-~]{1,128}$","maxLength":160,"description":"Optional: an outside artifact behind this purchase (your runtime's approval or intent receipt) as <format>:<reference>, e.g. dsse:art_e415901189dc1613. Signed verbatim onto the certificate; never fetched or verified here."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"item_id":"signature_agent_card","message":"Pleasure doing business. Here's your goods, warm off the shelf.","tip_usdc":0,"badge_url":"https://scvd.store/badges/41.svg","paid_usdc":0.99,"signature":"<128 hex chars, ed25519>","verify_url":"https://scvd.store/api/verify/<your cert_id>","certificate":{"date":"2026-07-22T15:04:05.000Z","item":"signature_agent_card","cert_id":"<cert_ + 12 chars, minted when this purchase settles>","patron_number":41},"deliverable":"<the The Calling Card itself, as text>","patron_number":41}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.99","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.99/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.99","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.99","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_QCCB3NaxxI2XWIIqKwHSt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.99","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Performs a one-shot directory battery check on a public HTTP-message-signatures key directory and returns a signed JSON verdict card with all check results, evidence hash, and a permanent card URL.","exampleAgentPrompt":"Run a signed directory battery check on my agent at https://myagent.example.com and give me a calling card — include the name 'MyAgent v2' on the certificate.","exampleUseCases":[{"title":"Agent directory readiness certification","prompt":"Check whether my agent's signing key directory at https://agent.acme.com is ready — run the full SCVD battery and give me a signed calling card I can share, with the name 'Acme Agent' on the certificate."},{"title":"Pre-launch compliance audit","prompt":"Before we go live, verify that https://staging.mybot.io passes the HTTP message signatures directory checks and hand me a signed verdict card so I have a dated record of the result."},{"title":"Third-party proof-of-possession receipt","prompt":"I need an independent signed certificate proving that https://payments.myservice.net passed proof-of-possession verification — can you grab a calling card from SCVD with the agent name 'PayService'?"}],"resultDescription":"A signed JSON calling card containing: the overall verdict (directory_ready, not_ready, unreachable, or refused), every named check from the directory battery including proof-of-possession, the check date, an evidence hash bound into the purchase certificate's attests field, a stable card URL serving the record for free permanently, a certificate with cert_id and patron number, an ed25519 signature with a verify URL, and a badge SVG URL.","failureModes":["URL points to scvd.store itself — refused by policy","Target origin is not reachable on the public internet — verdict: unreachable","Directory URL returns a malformed or non-compliant response — verdict: not_ready","Missing required 'url' query parameter — request rejected","URL is not HTTPS or uses a non-default port — may be rejected or flagged","Payment of $2 USDC via x402 fails — no card issued"],"whenToPreferThis":"Choose this endpoint when you need a signed, timestamped, third-party verdict on whether an agent's HTTP message signatures key directory is correctly configured and passes proof-of-possession — especially when you need a permanent, shareable certificate with an evidence hash rather than a transient check result. Prefer it over self-checks or informal audits when you need an independently signed record for compliance, audit trails, or credential sharing.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-25T00:32:47.363Z","isFirstParty":false,"canonicalSlug":"scvd-signature-agent-card-15cd521c"}