{"uid":"cap_qWEMHcsjAwPNIzrjpSNu3","slug":"unprice-jwt-decode-verify-api-4337af74","name":"Unprice JWT Decode & Verify API","description":"Tiny paid web services for agents. Pay per request with USDC on Base via x402, plus non-x402 Base USDC tx-hash checkouts for Merchant Feed Audit, Base USDC receipts, and recent wallet statements.","url":"https://volkov.evgeny.m2.fvds.ru/pay/jwt?utm_source=zero.xyz","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","properties":{"token":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"header":{"alg":"none"},"payload":{"sub":"1"},"verified":false}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_WP61gtJexHK8aD2nfRCLf","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Decodes and verifies a JWT token, returning its header, payload, and verification status via a pay-per-request endpoint.","exampleAgentPrompt":"Can you decode this JWT token for me and tell me if it's verified — the token is eyJhbGciOiJub25lIn0.eyJzdWIiOiIxIn0.?","exampleUseCases":[{"title":"Debug a received API token","prompt":"I got this JWT back from a third-party API: eyJhbGciOiJub25lIn0.eyJzdWIiOiIxIn0. — can you decode it and tell me what's in the payload and whether it's verified?"},{"title":"Check JWT algorithm used","prompt":"Can you inspect this JWT token and tell me what signing algorithm is in the header? Token: eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyIjoiYWJjIn0.signature"},{"title":"Validate token before trusting it","prompt":"Before I accept this token from a user, can you decode and verify it for me? Here it is: eyJhbGciOiJub25lIn0.eyJzdWIiOiJ1c2VyMTIzIn0."}],"resultDescription":"Returns a JSON object containing the JWT's decoded header (including the algorithm field), the decoded payload (e.g. subject claim), and a boolean 'verified' field indicating whether the token's signature was successfully verified.","failureModes":["Missing or malformed token query parameter returns an error or empty result","Token is structurally invalid (not a valid base64-encoded JWT) — parse error returned","Unverifiable signature returns verified: false rather than an error","Payment not completed (x402 flow not satisfied) — 402 Payment Required response","Network timeout or server unavailability"],"whenToPreferThis":"Use this endpoint when you need a quick, lightweight, pay-per-call JWT decode and verification without setting up a local JWT library or managing signing keys. Ideal for agent workflows that occasionally need to inspect tokens on-the-fly without a dedicated auth service. Best suited for low-volume, ad-hoc token inspection rather than high-throughput verification pipelines.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T06:46:23.891Z","isFirstParty":false,"canonicalSlug":"unprice-jwt-decode-verify-api-4337af74"}