{"uid":"cap_qauvmt-0nQdma2HPdcjJf","slug":"web-attestation-selfradiance-workers-dev-web-attestation-91080cfe","name":"web-attestation.selfradiance.workers.dev Web Attestation","description":"Returns an Ed25519-signed witness-only byte-observation attestation for a caller-supplied HTTPS URL.","url":"https://web-attestation.selfradiance.workers.dev/attest?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["payload","signature","kid"],"properties":{"kid":{"type":"string"},"payload":{"type":"object","required":["attestation_type","kid","attestation_id","observed_at","canonicalization","request","response","body","claims","human_notice"],"properties":{"kid":{"type":"string"},"body":{"type":"object","required":["hash_alg","sha256_hex","hash_subject","bytes_hashed","complete_body_observed","truncated","max_bytes"],"properties":{"hash_alg":{"type":"string","const":"sha-256"},"max_bytes":{"type":"number","const":1048576},"truncated":{"type":"boolean"},"sha256_hex":{"type":"string","pattern":"^[0-9a-f]{64}$"},"bytes_hashed":{"type":"number"},"hash_subject":{"type":"string","const":"response_body_bytes"},"complete_body_observed":{"type":"boolean"}},"additionalProperties":false},"claims":{"type":"string","const":"none"},"request":{"type":"object","required":["method","url","redirect_policy"],"properties":{"url":{"type":"string"},"method":{"type":"string","const":"GET"},"redirect_policy":{"type":"string","const":"manual_no_follow"}},"additionalProperties":false},"response":{"type":"object","required":["http_status","ok","content_type"],"properties":{"ok":{"type":"boolean"},"http_status":{"type":"number"},"content_type":{"type":"string"}},"additionalProperties":false},"observed_at":{"type":"string"},"human_notice":{"type":"string","const":"Byte-observation receipt only. Attests that this endpoint observed the above response at the stated time. No claim as to truth, legitimacy, ownership, or trustworthiness of the content."},"attestation_id":{"type":"string"},"attestation_type":{"type":"string","const":"byte_observation.v1"},"canonicalization":{"type":"string","const":"RFC8785-JCS"}},"additionalProperties":false},"signature":{"type":"string"}},"additionalProperties":false}}}}},"responseSchema":null,"example":{"request":{"input":{"type":"http","method":"GET","queryParams":{"url":"https://www.example.com"}}},"response":{"kid":"web-attestation-2026-06-14","payload":{"kid":"web-attestation-2026-06-14","body":{"hash_alg":"sha-256","max_bytes":1048576,"truncated":false,"sha256_hex":"ff67a9d764d6a2367a187734e697f6a53217db9a21c101d410a113ca871a299d","bytes_hashed":559,"hash_subject":"response_body_bytes","complete_body_observed":true},"claims":"none","request":{"url":"https://www.example.com","method":"GET","redirect_policy":"manual_no_follow"},"response":{"ok":true,"http_status":200,"content_type":"text/html"},"observed_at":"2026-06-16T17:38:23.671Z","human_notice":"Byte-observation receipt only. Attests that this endpoint observed the above response at the stated time. No claim as to truth, legitimacy, ownership, or trustworthiness of the content.","attestation_id":"WA-BHQLtxPtiPD6","attestation_type":"byte_observation.v1","canonicalization":"RFC8785-JCS"},"signature":"RDfJxqaImlZ9TRUJzM4f6ZGijqEwtewVWQLr6PlOeunc6PVnFQ5GWatvgmag6w5XhITT7zMH05Q1-XvxhlWaDw"}},"exampleRequest":{"url":"https://www.example.com"},"tags":["x402"],"displayCostAmount":"1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4eC2tAeHXEnMcu2Ie4t_z","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns an Ed25519-signed cryptographic attestation of the raw byte response observed at a caller-supplied HTTPS URL, without making any claims about content truth or legitimacy.","exampleAgentPrompt":"Can you get me a cryptographically signed Ed25519 attestation witnessing exactly what bytes https://api.example.com/data returns right now — I need the SHA-256 hash, HTTP status, and the signed payload as proof?","exampleUseCases":null,"resultDescription":"A JSON object containing: a base64 or hex Ed25519 signature, a structured payload with the attestation type, a key ID (kid), a unique attestation ID, the observed timestamp, the canonicalized request details (method, URL, redirect policy), response metadata (HTTP status, ok flag, content-type), and a SHA-256 hash of the response body bytes (with truncation info if body exceeded 1 MB). Includes a human_notice clarifying this is a byte-observation receipt only with no truth claims.","failureModes":["Target URL is not reachable or returns a network error — attestation cannot be produced","Target URL is HTTP (not HTTPS) — only HTTPS URLs are supported","URL returns a redirect — redirect_policy is manual_no_follow so no redirect is followed, response reflects the redirect itself","Response body exceeds 1 MB — body is truncated and truncated flag is set to true","Payment of 1 USDC not provided via x402 — returns 402 Payment Required","Invalid or malformed URL input — returns error response"],"whenToPreferThis":"Use this endpoint when you need a lightweight, cryptographically verifiable byte-level witness receipt for an HTTPS URL's current response — particularly useful for audit trails, dispute resolution, or proving to third parties what a URL returned at a specific moment. Prefer this over a simple web scraper when tamper-evidence and a signed timestamp matter. Not suitable if you need content interpretation, truth verification, or structured data extraction.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:31:40.793Z","isFirstParty":false,"canonicalSlug":"web-attestation-selfradiance-workers-dev-web-attestation-91080cfe"}