{"uid":"cap_Yn55QUyJGJ7GckxksQiVz","slug":"ddg-did-vc-credential-verifier-391b88e4","name":"DDG DID/VC Credential Verifier","description":"DID/VC credential verification: resolve did:web/did:key (or an inline DID document), check the Ed25519 proof signature, verificationMethod/key-purpose match, validity window, revocation, and walk an AIP delegation chain (scope-subset + validity-nesting). Deterministic valid/invalid/unverifiable verdict with reason codes, Ed25519-signed. $0.01.","url":"https://agents.daedalusdevelopmentgroup.com/v1/identity/verify-credential?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$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_l7iGlOjBdakDrjV5_SOwb","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":"Resolves and cryptographically verifies DID/VC credentials (did:web, did:key), checks Ed25519 signatures, key purposes, validity windows, revocation status, and AIP delegation chains, returning a deterministic verdict with reason codes.","exampleAgentPrompt":"Can you verify this verifiable credential for me — it's a did:web document with an Ed25519 proof — and tell me whether it's valid, invalid, or unverifiable, along with the reason code?","exampleUseCases":[{"title":"Agent identity credential check","prompt":"I need to verify that this AI agent's did:key credential is still valid and hasn't been revoked before I let it take actions on my behalf — can you check the Ed25519 signature and validity window?"},{"title":"Delegation chain authorization audit","prompt":"This AIP delegation chain claims an agent has permission to act on behalf of a user — can you walk the chain, check that the scopes are properly nested, and confirm the validity windows all line up?"},{"title":"Onboarding VC verification","prompt":"A new vendor just sent us their did:web verifiable credential as part of onboarding — can you resolve the DID document, verify the Ed25519 proof, and let me know if the credential passes or why it fails?"}],"resultDescription":"A deterministic verdict of 'valid', 'invalid', or 'unverifiable' accompanied by structured reason codes explaining the outcome. The response is itself Ed25519-signed by DDG, covering signature check results, key purpose match, validity window status, revocation status, and (if applicable) delegation chain scope and nesting validity.","failureModes":["DID document cannot be resolved (network error or unknown DID method) → 'unverifiable' verdict with resolution-failure reason code","Ed25519 signature check fails → 'invalid' verdict with signature-mismatch reason code","Credential outside validity window → 'invalid' verdict with expired or not-yet-valid reason code","verificationMethod key purpose mismatch → 'invalid' verdict with key-purpose reason code","Revocation check returns revoked status → 'invalid' verdict with revocation reason code","Malformed or missing required credential fields → validation error with schema reason code","AIP delegation chain scope exceeds parent scope → 'invalid' verdict with scope-overflow reason code"],"whenToPreferThis":"Choose this endpoint when you need a deterministic, cryptographically-signed verification of did:web or did:key credentials with full Ed25519 proof checking, revocation lookup, and AIP delegation chain walking — all in a single API call for $0.01. Prefer it over rolling your own DID resolution when you need a machine-payable, agent-friendly verification service that returns structured reason codes and a signed verdict suitable for audit trails.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T12:36:44.202Z","isFirstParty":false,"canonicalSlug":"ddg-did-vc-credential-verifier-391b88e4"}