{"uid":"cap_0vItr8CpG4Ba71Hr-23bP","slug":"fairseal-veo-2-object-verifier-2935ae18","name":"FairSeal VEO-2 Object Verifier","description":"Verify AI agent outputs against a VEO-2 schema. Checks structural validity, SHA-256 hash integrity (if content hash is present), and optional cryptographic signature on the output (if proof.provider_signature is present). Returns a verdict with per-check details.","url":"https://x402.fairseal.io/v1/veo/verify","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"entropy":{"type":"string","description":"At least one of execution/entropy required"},"version":{"type":"string","const":"2.0"},"provider":{"type":"object","required":["name"]},"standard":{"type":"string","const":"VEO"},"execution":{"type":"object","description":"At least one of execution/entropy required"},"issued_at":{"type":"string"},"object_id":{"type":"string"},"confidence":{"type":"object","required":["score"]},"object_class":{"enum":["VEO-2A","VEO-2B","VEO-2C","VEO-2D"],"type":"string"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_8FybChfP8h3ff86D8QA0X","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates VEO-2 objects by checking schema conformance, hash integrity, and optionally verifying cryptographic signatures.","exampleAgentPrompt":"Can you verify this VEO-2 object for me — check that the schema is valid, the hash hasn't been tampered with, and the signature checks out?","exampleUseCases":[{"title":"Tamper detection for verifiable credentials","prompt":"I received a VEO-2 credential from a partner — can you run it through the verifier to confirm the schema is correct, the hash is intact, and it hasn't been tampered with?"},{"title":"Signature verification before processing","prompt":"Before we process this VEO-2 payload in our pipeline, verify that the cryptographic signature is valid and the schema conforms to spec."},{"title":"Audit trail integrity check","prompt":"We archived a batch of VEO-2 objects last month — can you verify the integrity of this one, checking both the hash and the schema, to make sure it's unchanged since it was sealed?"}],"resultDescription":"A structured verification report indicating whether the VEO-2 object passes schema validation, hash integrity check, and (if applicable) signature verification — with pass/fail status for each check and any error details.","failureModes":["Schema validation fails if the object doesn't conform to the VEO-2 schema","Hash mismatch returns an integrity failure if the object has been modified","Signature verification fails if the key or algorithm doesn't match","Malformed input body returns a 400 error","Missing required fields in the VEO-2 object cause validation errors","Network or payment failures return 402 or 5xx errors"],"whenToPreferThis":"Use this endpoint when you need to verify VEO-2 objects specifically — combining schema validation, hash integrity, and optional signature verification in a single call. Prefer it over generic JSON validators when working with VEO-2 formatted verifiable objects where cryptographic integrity and signature authenticity matter.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:35:10.768Z","isFirstParty":false}