kairostamp.com publishes 10 machine-payable endpoints over the x402 protocol, priced from $0.005 to $0.05 per call. Each was probed directly; the response code below is what it returned.
| Endpoint | Method | Price | Probe |
|---|---|---|---|
| /api/v1/change-check | POST | $0.05 | 402 |
| /api/v1/digest | GET | $0.01 | 402 |
| /api/v1/headers | GET | $0.005 | 402 |
| /api/v1/link-map | GET | $0.015 | 402 |
| /api/v1/redirect-audit | GET | $0.01 | 402 |
| /api/v1/robots-check | GET | $0.005 | 402 |
| /api/v1/sitemap | GET | $0.01 | 402 |
| /api/v1/snapshot | POST | $0.05 | 402 |
| /api/v1/text-extract | GET | $0.02 | 402 |
| /api/v1/verify | GET | $0.005 | 402 |
Kairostamp change check: server-side fetch of one public http/https URL, compared against a caller-supplied prior SHA-256 or prior Kairostamp receipt id. Returns whether the response body changed, bot…
URL digest receipt: server-side fetch of one public http/https URL, returning a time-stamped receipt with the HTTP status, final URL, content type, byte length, SHA-256 of the response body, redirect …
URL HTTP metadata receipt: server-side fetch of one public http/https URL, returning only transport metadata — HTTP status, final URL, redirect chain, content type and byte length — plus a receipt id.…
Link map: fetches one public HTML page server-side and returns up to 100 normalized, deduplicated http/https links with internal/external classification and counts, the final URL, a timestamp and a ta…
Redirect audit: follows one public http/https URL server-side and returns the ordered redirect chain, hop count, final URL, final HTTP status, whether the destination changed origin and whether HTTPS …
robots.txt check: fetches the origin's /robots.txt server-side and reports whether a given URL path is allowed or blocked for a user agent, with the matched rule, the robots URL, the HTTP status, a ti…
Sitemap lookup: locates a site's sitemap from robots.txt or same-origin /sitemap.xml, fetches it server-side and returns up to 100 normalized http/https URLs with the sitemap URL, document kind, count…
Kairostamp evidence snapshot: server-side fetch of one public http/https URL, returning a time-stamped receipt with the response status, content type, byte length, SHA-256 of the body, redirect chain,…
Readable text extraction: fetches one public HTML page server-side and returns clean plain text with the page title, final URL, HTTP status, content type, SHA-256 of the response body, a timestamp and…
Receipt verification: read-only hash-chain verification of one existing Kairostamp receipt id. Recomputes the canonical SHA-256 digest, compares it with the stored chain hash, checks linkage to the pr…