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Use it for feeds and sitemaps; for JSON use /verify-json, for HTML use /verify. Paths address elements and @attributes (urlset.url[0].loc). String-exact; ambiguous or volatile values return unverifiable, never a guess. First 100 checks per client are free: resend with header X-Use-Free-Allowance: yes and no payment to use them.","extensions":{"bazaar":{"info":{"input":{"body":{"claim":{"urlset.url[0].loc":"https://scrapecheck.fly.dev/"},"url":"https://scrapecheck.fly.dev/sitemap.xml"},"bodyType":"json","method":"POST","type":"http"},"output":{"example":{"check_type":"xml_field_v1","confidence":0.95,"engine":"web_field_v1/0.3.2+17e21204a029","evidence":{"lens_votes":{},"refetch_excerpt":"{\"urlset.url[0].loc\":\"https://scrapecheck.fly.dev/\"}","refetched_at":"2026-08-28T00:00:00.000Z","second_fetch_at":"2026-08-28T00:00:01.000Z"},"key_id":"k2","reasons":["claimed value found at path \"urlset.url[0].loc\" (matched element: url)"],"signature":"ed25519:…","source_hash":"sha256:…","verdict":"pass","verdict_id":"00000000-0000-0000-0000-000000000000","verifier_url":"https://scrapecheck.fly.dev"},"type":"json"}},"schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"claim":{"description":"see the route description; there is no asked field - this tier adjudicates exactly what it accepts","type":"object"},"url":{"description":"public HTTPS URL","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":{"properties":{"check_type":{"description":"The check contract used, e.g. web_field_v1.","type":"string"},"confidence":{"description":"The engine's confidence in the verdict, 0 to 1.","type":"number"},"engine":{"description":"Engine name and version digest that produced the verdict.","type":"string"},"evidence":{"description":"What the re-fetch observed.","properties":{"lens_votes":{"description":"Boolean votes is_real, is_current, does_answer from the judging lenses.","properties":{"does_answer":{"type":"boolean"},"is_current":{"type":"boolean"},"is_real":{"type":"boolean"}},"type":"object"},"refetch_excerpt":{"description":"Excerpt of the re-fetched page content the verdict was judged against.","type":"string"},"refetched_at":{"description":"UTC timestamp of the engine's own fetch of the page.","type":"string"}},"type":"object"},"key_id":{"description":"Identifier of the signing key; resolve against GET /pubkey.","type":"string"},"reasons":{"description":"The stated reasons for the verdict.","items":{"type":"string"},"type":"array"},"signature":{"description":"ed25519 signature over canonical sorted-key JSON of every field except signature.","type":"string"},"source_hash":{"description":"sha256 of the normalized page text the verdict judged; null when no anchor text was obtained.","type":["string","null"]},"verdict":{"description":"One of pass, fail, unverifiable.","enum":["pass","fail","unverifiable"],"type":"string"},"verdict_id":{"description":"Unique identifier for this verdict; its issuance is confirmable at GET /verdicts/{verdict_id}.","type":"string"},"verifier_url":{"description":"The issuing service's URL; display only, never a trust root.","type":"string"}},"required":["verdict_id","verdict","confidence","reasons","evidence","check_type","engine","key_id","verifier_url","source_hash","signature"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"}},"errorNote":"A page that cannot be verified is NOT an error: unverifiable (or fail on /verify-presence) is a signed 200 verdict. 4xx means the request never reached the engine.","errors":[{"body":{},"name":"Payment Required","note":"the x402 v2 challenge is not in the body; it is base64-encoded JSON in the PAYMENT-REQUIRED response header","status":402,"when":"any request without valid payment, a free-allowance header, or a service key — including requests with malformed bodies: payment is checked before input validation"},{"body":{"details":["url: Invalid url","claim: Required","asked: Required"],"error":"invalid input contract"},"name":"Bad Request","note":"details lists one entry per failing field, in the form \"<field>: <problem>\"","status":400,"when":"payment or allowance has cleared but the body does not match the input contract"},{"body":{"error":"rate limit exceeded — try again shortly"},"name":"Too Many Requests","status":429,"when":"requests exceed the per-minute rate limit, paid or not"}]},"lastUpdated":"2026-10-26T00:13:23.804Z","quality":{"l30DaysTotalCalls":6,"l30DaysUniquePayers":5,"lastCalledAt":"2026-10-26T00:13:23.711Z"},"resource":"https://scrapecheck.fly.dev/verify-xml","serviceName":"ScrapeCheck","tags":["verification","xml","feeds","data-quality"],"type":"http","x402Version":2},"source":"x402_bazaar","summary":"XML tier (deterministic, no LLM): verifies a claimed value lives at a named path in a public XML document, by independent double re-fetch. Use it for feeds and sitemaps; for JSON use /verify-json, for HTML use /verify. Paths address elements and @attributes (urlset.url[0].loc). String-exact; ambiguous or volatile values return unverifiable, never a guess. 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