{"slug":"scrooge-x402-tool-mill-vercel-app-v1-change-fingerprint-9ff2dd","title":"Fingerprint a public page so agents can detect changes","host":"scrooge-x402-tool-mill.vercel.app","method":"POST","resource":"https://scrooge-x402-tool-mill.vercel.app/v1/change-fingerprint","category":"other","description":"Fingerprint a public page so agents can detect changes: final url, etag, lastModified, sha256 contentHash of normalized visible text, raw byteLength, and fetchedAt. POST JSON {\"url\":\"https://example.com\"}. Public http(s) only; private hosts blocked. $0.04 USDC on Base (eip155:8453). No API key.","price_listed":0.04,"price_asked":0.04,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":237,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"url":"https://example.com"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"additionalProperties":false,"properties":{"url":{"description":"Public http(s) URL to fetch (SSRF-safe; private/link-local blocked)","format":"uri","type":"string"}},"required":["url"],"type":"object"},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"additionalProperties":false,"properties":{"byteLength":{"description":"Raw upstream response size in bytes","minimum":0,"type":"integer"},"contentHash":{"description":"sha256 hex of normalized visible text","pattern":"^[a-f0-9]{64}$","type":"string"},"etag":{"description":"Upstream ETag header, or null","type":["string","null"]},"fetchedAt":{"description":"ISO-8601 time the page was fetched","format":"date-time","type":"string"},"lastModified":{"description":"Upstream Last-Modified header, or null","type":["string","null"]},"url":{"description":"Final URL after redirects","format":"uri","type":"string"}},"required":["url","etag","lastModified","contentHash","byteLength","fetchedAt"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.04,"price_match":true,"latency_ms":237,"error":null}],"description_full":"Fingerprint a public page so agents can detect changes: final url, etag, lastModified, sha256 contentHash of normalized visible text, raw byteLength, and fetchedAt. POST JSON {\"url\":\"https://example.com\"}. Public http(s) only; private hosts blocked. $0.04 USDC on Base (eip155:8453). No API key.","last_updated":"2026-09-23T04:06:17.784Z","schemes":["exact"]}