{"uid":"cap_jo-JFsU1qZPWNWDQB0UKA","slug":"signgate-sumsub-kyt-evidence-lookup-5b58cc22","name":"SignGate Sumsub KYT Evidence Lookup","description":"Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.","url":"https://base-agent-preflight.bytoken2023.workers.dev/v1/x402/sumsub/kyt-evidence","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["transaction_id"],"properties":{"asset":{"type":"string","pattern":"^[A-Za-z0-9._:-]{2,32}$"},"chain":{"type":"string","pattern":"^[A-Za-z0-9._:-]{2,64}$"},"transaction_id":{"type":"string","pattern":"^[A-Za-z0-9._:-]{1,128}$","description":"Sumsub transaction id, SignGate transaction reference, or sandbox fixture id."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"network":{"type":"string"},"product":{"type":"string"},"activity":{"type":"object"},"identity":{"type":"object"},"assessment":{"type":"object"},"provenance":{"type":"object"}}}}}}},"responseSchema":{"type":"json","example":{"network":"eip155:8453","product":"sumsub-kyt-evidence","assessment":{"flags":[],"risk_level":"low","risk_score":0}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.03","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":"$0.03/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_avc4g257-8yRBDGB1fmGJ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.03","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves Sumsub Know-Your-Transaction (KYT) evidence and risk assessment for a given transaction ID before an AI agent proceeds with an x402 micropayment purchase.","exampleAgentPrompt":"Before paying for that x402 API, run a KYT preflight check on Sumsub transaction ID 'txn-abc123xyz' on the Base network to make sure the risk level is low and there are no compliance flags.","exampleUseCases":[{"title":"Preflight before buying x402 dataset","prompt":"Before my agent buys that x402 dataset, check Sumsub KYT evidence for transaction ID 'sumsub-tx-00987' on eip155:8453 and tell me the risk score and any flags."},{"title":"Compliance screen for agent micropayment","prompt":"Run a KYT risk check on transaction 'kyt-ref-443322' using the Sumsub evidence endpoint — I need to know if the risk level is low before approving the USDC payment on Base."},{"title":"Audit trail for past x402 purchase","prompt":"Pull the Sumsub KYT evidence for transaction ID 'archive-tx-20240601' on Base so I can review the activity, identity, and provenance details for our compliance records."}],"resultDescription":"Returns a JSON object containing the network (e.g. eip155:8453), product identifier, and an assessment object with risk_level (e.g. 'low'), risk_score (numeric), flags array, plus optional activity, identity, and provenance sub-objects for the queried transaction.","failureModes":["Missing or invalid transaction_id returns a 400 or validation error","Unknown transaction_id that Sumsub has no record of may return empty or null assessment","Malformed asset or chain identifiers (not matching pattern ^[A-Za-z0-9._:-]{2,32}$) cause schema validation failure","Service unavailable on the Cloudflare Workers edge returns 5xx","Payment not made (x402 gate) returns 402 Payment Required before any data is served"],"whenToPreferThis":"Use this endpoint when an AI agent needs to perform a compliance preflight check on a specific Sumsub transaction ID before executing an x402 micropayment on the Base network. Prefer it over generic blockchain analytics when you specifically have a Sumsub transaction reference and need KYT evidence with structured risk scoring and flags. It is especially suited for agentic purchase governance workflows where policy requires low risk_level confirmation before proceeding.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:49:43.961Z","isFirstParty":false}