{"uid":"cap_ydRgD5Cs-_xWP4BZO2F1E","slug":"ddg-x402-trust-probe-8c8bd951","name":"DDG X402 Trust Probe","description":"Machine-payable DDG services for AI agents. Current public live payment rails are x402 multi-chain USDC and direct-crypto auto/manual for public receiving-address families. MPP/Stripe/Tempo is installed but pending live provider env plus penny-settlement proof before any MPP-live advertisement. DDG sells bounded artifacts/results, not raw provider account access.","url":"https://agents.daedalusdevelopmentgroup.com/v1/x402/trust-probe?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input","output"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object"},"type":{"type":"string","const":"http"},"method":{"enum":["POST","PUT","PATCH"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":true},"output":{"type":"object","required":["type","example"],"properties":{"type":{"type":"string"},"example":{"ok":true}},"additionalProperties":true}}},"responseSchema":{"type":"json","example":{"ok":true}},"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_diwG7o826wx-jhcxaSNeX","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":"Evaluates the trustworthiness of a paid x402 endpoint by probing its 402 challenge structure, liveness, on-chain settlement history, and sybil signals, returning a signed trusted/caution/untrusted verdict.","exampleAgentPrompt":"Before I integrate that x402 endpoint at https://some-agent-service.com/v1/answer, can you run a trust probe on it — POST method, JSON body — and tell me if it's trusted, caution, or untrusted based on its 402 structure, liveness, and on-chain settlement history?","exampleUseCases":[{"title":"Pre-integration vetting of unknown agent API","prompt":"I found a new x402 agent service at https://unknown-agent.io/v1/search that charges per call — can you probe it with a POST and JSON body and give me a signed trust verdict before I let my agent start paying it?"},{"title":"Sybil detection for agent marketplace listing","prompt":"We're listing x402 services on our marketplace — can you check https://new-vendor.ai/v1/chat via POST for sybil fan-out signals and on-chain settlement history so we know if it has real paying users?"},{"title":"Periodic trust re-check of known paid endpoint","prompt":"We've been using https://trusted-agent.example.com/v1/summarize for a while — can you run a fresh trust probe on it with settle_probe enabled so I can see the signed probe plan and confirm it's still behaving legitimately?"}],"resultDescription":"A signed verdict object containing: trust rating (trusted/caution/untrusted), 402 challenge structure validation results, liveness latency metrics, on-chain settlement statistics (distinct payer count, recent settlement transaction count), sybil fan-out signal assessment, and optionally a signed PROBE PLAN detailing what would be purchased if payment were made.","failureModes":["Target endpoint is unreachable — returns error with liveness failure detail","Target endpoint does not return a valid 402 response — verdict defaults to untrusted","On-chain RPC query fails — settlement history unavailable, partial verdict returned","settle_probe=true requested but endpoint 402 structure is malformed — probe plan cannot be generated","Input schema missing required fields (type, method, bodyType, body) — returns 400 validation error"],"whenToPreferThis":"Use this endpoint when you need to programmatically vet an unknown or newly discovered x402 agent-payable service before committing funds or integrating it into an automated payment workflow. It is the right choice when you need a signed, multi-signal trust verdict combining protocol-level validation, liveness, and real on-chain settlement evidence — superior to manually inspecting 402 headers or checking a single signal.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T07:20:27.286Z","isFirstParty":false,"canonicalSlug":"ddg-x402-trust-probe-8c8bd951"}