{"uid":"cap_QqDy9AeLd-T7nCbIajrZF","slug":"signgate-stablecoin-health-preflight-c51f2997","name":"SignGate Stablecoin Health 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/agent-risk/stablecoin-health","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["chain","token"],"properties":{"chain":{"type":"string","pattern":"^[A-Za-z0-9:_ -]{2,80}$"},"token":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$"},"use_case":{"type":"string","pattern":"^[A-Za-z0-9_.:-]{2,80}$"}}}},"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":"stablecoin-health","assessment":{"flags":[],"risk_level":"low","risk_score":0}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_6nmiJMLngbpB0DJppfrto","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Assesses the risk and health of a stablecoin token on a given chain before an AI agent purchases an x402-gated API, dataset, or tool priced in that stablecoin.","exampleAgentPrompt":"Before my agent pays for that x402 dataset using USDC on Base (token 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48), can you run a stablecoin health preflight on chain eip155:8453 to check the risk score and any flags?","exampleUseCases":[{"title":"Pre-purchase stablecoin safety check","prompt":"My agent is about to buy an x402 API using the token at 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on eip155:8453 — can you check the stablecoin health and risk level before it spends anything?"},{"title":"Autonomous agent payment governance","prompt":"Before my trading bot pays for a DeFi data feed on Base using a stablecoin, run a preflight risk assessment on token 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on chain eip155:8453 and tell me the risk score and any flags."},{"title":"Stablecoin vetting for agent fleet","prompt":"I'm setting up a fleet of AI agents that will buy x402 tools automatically — can you check the health of the stablecoin at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA on eip155:8453 and confirm it's low risk before I configure it as their payment token?"}],"resultDescription":"A JSON object containing the network identifier, product name ('stablecoin-health'), and an assessment block with risk_level (e.g. 'low'), a numeric risk_score, and an array of flags describing any detected issues with the token's health or safety on the specified chain.","failureModes":["Invalid or malformed token address (must be 0x-prefixed 40-char hex) returns validation error","Unsupported chain identifier returns error or empty assessment","Token not found or not indexed on specified chain may return null or unknown risk","Service unavailable on Cloudflare Workers edge returns 5xx","Payment failure (x402) if USDC payment not processed returns 402"],"whenToPreferThis":"Use this endpoint when an AI agent is about to autonomously spend stablecoin funds via x402 and needs a lightweight, fast risk signal on the payment token itself — specifically the stablecoin's health, not the target API's content. Prefer this over general token analytics when you need a pass/fail governance gate before a micropayment, especially on Base (eip155:8453).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:48:16.979Z","isFirstParty":false}