kairostamp.com v1 robots-check

https://kairostamp.com/api/v1/robots-check

answers 402

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 timestamp and a tamper-evident receipt. Query parameters: url (required), user_agent (optional, defaults to *). Only robots.txt is fetched; no crawling. Pair with GET /api/v1/link-map or /api/v1/sitemap

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.

Price: $0.005
Network: base-sepolia
Pay to: 0xdB6F694aE695C632C82677a50593B46137808453
Spec dialect: v2 (declares x402Version 2)
Transport: PAYMENT-REQUIRED header
HTTP method: GET
Response latency: 2701 ms
Payment options: 1 usable of 1
Last checked: 2026-09-06T01:19:26.450Z (26d ago)
Category: finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fkairostamp.com%2Fapi%2Fv1%2Frobots-check"