{"slug":"source-claim-proof-mattskowronis-workers-dev-v1-verify-5ae6cd","title":"Verify whether a supplied public source page currently supports one atomic factu","host":"source-claim-proof.mattskowronis.workers.dev","method":"POST","resource":"https://source-claim-proof.mattskowronis.workers.dev/v1/verify","category":"search","description":"Verify whether a supplied public source page currently supports one atomic factual claim. Returns supported, contradicted, or insufficient-evidence plus source snippets, or explicit blocked/unreachable/unsupported states. Not a general fact checker or web search.","price_listed":0.01,"price_asked":0.01,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":346,"reported_calls_30d":6,"reported_payers_30d":4,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"claim":"The event begins at 7:00 PM.","url":"https://example.com/event"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"claim":{"description":"One atomic factual assertion to check against that source only.","maxLength":500,"minLength":3,"type":"string"},"url":{"description":"Public HTTP or HTTPS source page URL to inspect.","maxLength":2048,"type":"string"}},"required":["url","claim"]},"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":{"claim":{"description":"The claim that was checked.","type":"string"},"content_hash":{"description":"Hash of retrieved source content.","type":"string"},"evidence":{"description":"Compact source snippets used for the verdict.","items":{"additionalProperties":false,"properties":{"evidence_type":{"description":"Where the snippet came from on the source page.","enum":["visible_text","heading","json_ld","meta","status"],"type":"string"},"location":{"description":"Page location of the snippet, or null if unknown.","type":["string","null"]},"polarity":{"description":"Whether the snippet supports, contradicts, or is neutral.","enum":["supports","contradicts","neutral"],"type":"string"},"text":{"description":"Source snippet that supports or contradicts the claim.","maxLength":240,"type":"string"}},"required":["text","location","evidence_type","polarity"],"type":"object"},"maxItems":3,"type":"array"},"final_url":{"description":"Final URL after redirects.","type":"string"},"reasoning_summary":{"description":"Short machine-readable reason for the verdict.","maxLength":400,"type":"string"},"retrieval_method":{"description":"How the source page was fetched.","enum":["direct_http","browser_run","official_api","unsupported"],"type":"string"},"retrieved_at":{"description":"UTC timestamp of the check.","type":"string"},"service_version":{"description":"Source Claim Proof service version.","type":"string"},"source_status":{"description":"verified, blocked, unreachable, unsupported, or insufficient_evidence.","enum":["verified","blocked","unreachable","unsupported","insufficient_evidence"],"type":"string"},"source_url":{"description":"Requested source URL.","type":"string"},"verdict":{"description":"supported, contradicted, or insufficient_evidence.","enum":["supported","contradicted","insufficient_evidence"],"type":"string"}},"required":["verdict","claim","source_url","final_url","source_status","evidence","reasoning_summary","retrieval_method","retrieved_at","content_hash","service_version"],"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":0.01,"price_match":true,"latency_ms":346,"error":null}],"description_full":"Verify whether a supplied public source page currently supports one atomic factual claim. Returns supported, contradicted, or insufficient-evidence plus source snippets, or explicit blocked/unreachable/unsupported states. Not a general fact checker or web search.","last_updated":"2026-09-14T19:53:47.05Z","schemes":["exact"]}