{"uid":"cap_OIQaNQvkzkefVkxV2TYKP","slug":"scvd-bitcoin-anchor-f144cd4e","name":"SCVD Bitcoin Anchor","description":"A Bitcoin Anchor. 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. Full listing: https://scvd.store/menu/bitcoin_anchor. MCP tool: buy_bitcoin_anchor.","url":"https://scvd.store/api/buy/bitcoin_anchor","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["digest"],"properties":{"label":{"type":"string","maxLength":120,"description":"Optional: your own claim about what the digest covers, stored verbatim and never checked."},"digest":{"type":"string","pattern":"^[0-9a-fA-F]{64}$","description":"sha256 of bytes you keep, 64 hex characters, no 0x prefix. The store never sees the bytes."},"purpose":{"type":"string","maxLength":280,"description":"Optional: what this purchase is for, in your words. Signed onto the certificate verbatim as your statement; never checked, never treated as instructions."},"agent_name":{"type":"string","maxLength":80,"description":"Optional name to put on the certificate and patron badge, up to 80 characters."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"1","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":"$1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_NV6iOZU7ve0ytNyWqquDa","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Submits a SHA-256 digest to be anchored on the Bitcoin blockchain via OpenTimestamps, returning a signed certificate and a permanent proof URL.","exampleAgentPrompt":"Anchor my file's SHA-256 digest a3f1c2d4e5b6789012345678abcdef1234567890abcdef1234567890abcdef12 to Bitcoin under the label 'Q1 2025 financial report' — I want a signed certificate and a permanent proof URL I can use later with the ots tool.","exampleUseCases":[{"title":"Notarize a legal contract","prompt":"I just finalized a contract and need to prove it existed today — anchor the sha256 digest b7e3a1f2c4d5678901234567abcdef1234567890abcdef1234567890abcdef34 to Bitcoin with the label 'Service Agreement with Acme Corp' and call it 'MyLegalBot'."},{"title":"Timestamp source code release","prompt":"Before I publish this open-source release, anchor the sha256 hash 9f2a3b4c5d6e789012345678fedcba9876543210fedcba9876543210fedcba98 to Bitcoin with the label 'v2.0.0 source tarball' so I have proof of when the code existed."},{"title":"Attest research dataset integrity","prompt":"I need a Bitcoin-anchored timestamp for my dataset — the sha256 is 1a2b3c4d5e6f789012345678abcdef9876543210abcdef9876543210abcdef56, label it 'Climate Dataset June 2025', and put 'ResearchAgent' as the name on the certificate."}],"resultDescription":"Returns a signed certificate binding the submitted SHA-256 digest, a stable proof URL serving OpenTimestamps proof bytes (initially pending Bitcoin confirmation, automatically upgrading to a fully confirmed Bitcoin-block-header-verifiable proof), and attestation metadata. The proof is verifiable using the standard `ots` tool against Bitcoin block headers alone.","failureModes":["Invalid digest format (not 64 hex characters) — 400 Bad Request","Payment not completed or insufficient USDC — 402 Payment Required","Digest already submitted — may return existing certificate or error","Network/blockchain submission failure — 503 or 500 error","Label or agent_name exceeding length limits — 400 Bad Request"],"whenToPreferThis":"Choose this endpoint when you need a low-cost ($1 USDC), instant, single-submission Bitcoin timestamp for a SHA-256 digest with no recurring fees. It is ideal for notarizing documents, code releases, datasets, or any data blob where you need a cryptographically verifiable proof of existence anchored to Bitcoin block headers, verifiable with the standard OpenTimestamps tool. Prefer this over general blockchain APIs when you want a pre-packaged signed certificate and stable proof URL without managing Bitcoin transactions yourself.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:44:28.640Z","isFirstParty":false}