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SCVD Bitcoin Anchor
x402
SCVD Bitcoin Anchor is a paid API for AI agents from scvd.store, paid per call via x402, $1/call, status unknown (last checked 2026-10-30).
Submits a SHA-256 digest to be anchored on the Bitcoin blockchain via OpenTimestamps, returning a signed certificate and a permanent proof URL.
Price / call$1
Success—
StatusUnknown
How this service works
A Bitcoin Anchor. REQUIRES ?digest= on the paid request — a signed request without it is refused before the gate and no money moves. 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 listi…
Output
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.
Example use cases
Notarize a legal contract
“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'.”
Timestamp source code release
“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.”
Attest research dataset integrity
“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.”
Technical details
Endpoint
GEThttps://scvd.store/api/buy/bitcoin_anchor?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"item_id": "bitcoin_anchor",
"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": 1,
"signature": "<128 hex chars, ed25519>",
"verify_url": "https://scvd.store/api/verify/<your cert_id>",
"certificate": {
"date": "2026-07-22T15:04:05.000Z",
"item": "bitcoin_anchor",
"cert_id": "<cert_ + 12 chars, minted when this purchase settles>",
"patron_number": 41
},
"deliverable": "<the A Bitcoin Anchor itself, as text>",
"patron_number": 41
}
}Tags
x402
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