{"uid":"cap_hvWnLk_Qz1Bh6d7MHmb_4","slug":"uta-trust-api-agent-trust-card-verifier-857de95c","name":"UTA Trust API – Agent Trust Card Verifier","description":"Agent trust verification (ATC/1.0) as a paid x402 resource on Base Mainnet and Base Sepolia. Real Ed25519 verification at the edge; settlement via production facilitators (mainnet: PayAI; testnet: x402.org) with EIP-3009.","url":"https://uta-trust-api.eddyflores100.workers.dev/v1/trust/verify?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"card":{"type":"object","description":"Agent Trust Card ATC/1.0 (payload + signature.value hex)"}}},"responseSchema":{"type":"json","example":{"risk":"low","payer":"0x…","digest":"<sha256 hex>","reason":null,"stages":{"trust_anchor":"pass","validity_window":"pass","signature_verification":"pass"},"protocol":"ATC/1.0","verified":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_Jwk-01DRopQSwfOROVAjy","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":"Verifies an Agent Trust Card (ATC/1.0) via Ed25519 signature validation, returning a risk score and per-stage verification results for trust anchor, validity window, and signature","exampleAgentPrompt":"Can you verify this agent trust card for me? Here's the ATC/1.0 payload and Ed25519 signature hex — I need to know if the trust anchor passes, the validity window is good, and what the overall risk level comes back as.","exampleUseCases":[{"title":"Gate agent access in a multi-agent system","prompt":"Before my orchestration agent hands off a task to this sub-agent, verify its ATC/1.0 trust card — give me the risk level and confirm that the trust anchor and signature both pass."},{"title":"Audit trail for autonomous agent transactions","prompt":"I need to verify and log the trust card for the agent that just submitted this action — run it through ATC/1.0 verification and return the SHA-256 digest and payer address so I can record them."},{"title":"Real-time trust check before payment release","prompt":"Before releasing funds, verify this agent's trust card using the ATC/1.0 protocol — I need to confirm the signature is valid and the risk comes back as low."}],"resultDescription":"A JSON object containing: 'verified' (boolean), 'risk' (e.g. 'low'), 'payer' (Ethereum address), 'digest' (SHA-256 hex of the payload), 'reason' (null on success or an error string), 'protocol' ('ATC/1.0'), and 'stages' with pass/fail results for 'trust_anchor', 'validity_window', and 'signature_verification'.","failureModes":["Invalid or malformed ATC/1.0 card returns verified: false with a reason string","Expired validity window causes validity_window stage to fail","Bad Ed25519 signature causes signature_verification stage to fail","Payment failure (insufficient USDC or wrong network) blocks the request entirely","Malformed hex in signature.value field returns a parse error"],"whenToPreferThis":"Choose this endpoint when you need cryptographic, ATC/1.0-compliant Ed25519 verification of an AI agent's trust card with a structured per-stage breakdown (trust anchor, validity window, signature). Prefer it over generic JWT or OAuth checks when operating in a Web3 / Base network context and when on-chain payment settlement via EIP-3009 is acceptable. It is especially suited for agent-to-agent trust establishment in multi-agent pipelines where a verifiable risk score and payer address are required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T06:35:51.277Z","isFirstParty":false,"canonicalSlug":"uta-trust-api-agent-trust-card-verifier-857de95c"}