AttestPage
Last updated: 2026-10-10
Signed evidence about web pages, for AI agents. Ask whether a quote appears on a page or check every citation in an answer at once, fetch a page and learn what actually came back, check a list of links, check that package names exist on npm, PyPI or crates.io, or timestamp a hash. Every answer carries an Ed25519-signed receipt that anyone can check offline against our published keys.
A receipt records what our fetcher saw at a given time; it does not show that a statement on the page is correct.
Endpoints
| Route | Price per call | What you get |
|---|---|---|
POST /v1/verify/quote | US$0.01 | your exact words checked against the page: exact, fuzzy or none match, offsets, page hashes, context, page verdict, receipt; or the passages best matching a paraphrased claim |
POST /v1/verify/citations | US$0.10 | up to 10 quote and URL pairs: the quote verdict per citation and the page verdict per URL, one receipt |
POST /v1/verify/document | US$0.10 per part | a whole answer or report: its quotes and links found and checked, 10 pairs a part, free preview first |
POST /v1/fetch | US$0.002 | content_kind verdict, status, final URL, title, hashes, injection flags, optional text, receipt |
POST /v1/check/links | US$0.005 | up to 10 URLs: status, redirects, content_kind, hash per URL, one receipt |
POST /v1/check/packages | US$0.005 | up to 10 npm, PyPI or crates.io names: exists in registry, latest version, metadata, one receipt (not a security verdict) |
POST /v1/attest | US$0.002 | signed timestamp over a SHA-256 you supply |
POST /v1/receipt/verify | free | checks a receipt against our keys |
GET /v1/sample/{name} | free | each paid route run on fixed demo data |
Payment is x402 v2 in USDC on Base Sepolia, a test network. A request that fails validation gets 400 before any payment is asked for. See Payments for when a call is charged.
Start here
- Call a free sample:
curl https://vehcdj664efetfrsolne5umanq.srv.us/v1/sample/quote - Check its receipt:
curl -X POST https://vehcdj664efetfrsolne5umanq.srv.us/v1/receipt/verify -H 'content-type: application/json' -d '{"receipt":"<receipt>"}' - Call a paid route without payment to see the 402 offer, then pay with any x402 v2 client.
For agents
- llms.txt and llms-full.txt
- OpenAPI 3.1, pricing.json, x402 discovery
- Every page here is also markdown: add
.mdto the URL or sendAccept: text/markdown.