{"uid":"cap_mPY9qdGpoQrNHdT0ZWZ6w","slug":"signgate-x402-sumsub-proof-of-address-evidence-preflight-8b5ddee0","name":"SignGate x402 Sumsub Proof-of-Address Evidence Preflight","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/poa-evidence","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["applicant_id"],"properties":{"applicant_id":{"type":"string","pattern":"^[A-Za-z0-9._:-]{1,128}$","description":"Sumsub applicant id or sandbox fixture reference."},"jurisdiction":{"type":"string","pattern":"^[A-Z]{2}$","description":"ISO-3166 country code used by the policy gate."}}}},"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-poa-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_iUPsREm5V8rbrtKWDBryx","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":"Validates a Sumsub applicant's proof-of-address evidence and computes a risk score before an AI agent proceeds with an x402-gated purchase.","exampleAgentPrompt":"Before my agent buys that x402-gated dataset, run a proof-of-address preflight on Sumsub applicant ID 'app-7f3a9b2c' in jurisdiction US and tell me the risk score and any compliance flags.","exampleUseCases":[{"title":"Pre-purchase compliance check for agent","prompt":"My AI agent is about to buy an x402 API access using applicant ID 'agt-00123xyz' — can you run the Sumsub proof-of-address preflight for jurisdiction DE and tell me whether the risk level is low enough to proceed?"},{"title":"Jurisdiction eligibility screening","prompt":"Check if applicant 'sandbox:fixture-poa-pass' is cleared to make purchases in the GB jurisdiction according to the proof-of-address evidence — I need the risk score and any flags before we proceed."},{"title":"Blocked buyer investigation","prompt":"Our agent got flagged on a purchase attempt — can you pull the Sumsub POA evidence assessment for applicant ID 'usr-flagged-99z' under jurisdiction CA so I can see what risk level and flags are blocking it?"}],"resultDescription":"Returns a JSON object containing the EIP-155 network identifier (e.g. eip155:8453 for Base), the product name ('sumsub-poa-evidence'), and an assessment object with a risk_level string (e.g. 'low'), a numeric risk_score (0–100), and a flags array listing any compliance issues detected against the applicant's proof-of-address data.","failureModes":["Missing or malformed applicant_id returns a validation error","Invalid jurisdiction code (not ISO-3166 two-letter uppercase) causes a 400 error","Unknown or unregistered Sumsub applicant ID returns not-found or empty assessment","Sumsub backend unavailability causes a 502/503 upstream error","Payment not included or invalid x402 payment header returns 402 Payment Required"],"whenToPreferThis":"Use this endpoint when an AI agent needs to perform a lightweight, per-call compliance preflight specifically against Sumsub proof-of-address evidence on the Base network (eip155:8453) before committing to an x402 micropayment. Prefer it over general KYC endpoints when the product category is 'sumsub-poa-evidence' and you need a structured risk score and flags rather than a binary pass/fail.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:54:48.066Z","isFirstParty":false}