{"uid":"cap_f0NyISJc4b3jGOzOirNfl","slug":"jwt-decode-inspect-e425faad","name":"JWT Decode & Inspect","description":"Machine-buyable infrastructure for autonomous agents: API cost routing, margin optimization, funding-rate data, webpage extraction, result verification, spend controls, retry planning, state, tender search and GitHub bounty intelligence.","url":"https://bounty-engineer-x402-prod.onrender.com/v1/jwt-decode?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"token":{"type":"string","maxLength":16384}}},"responseSchema":{"type":"json","example":{"ok":true,"result":{"header":{"alg":"HS256"},"payload":{"sub":"123"},"signature_present":true,"signature_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_HAGjiOuyaJtb78xfdHYxb","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Decodes and inspects a JWT token, returning its header, payload, and signature presence/verification status.","exampleAgentPrompt":"Can you decode this JWT for me and tell me what's in the header and payload, and whether the signature is present: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjMiLCJuYW1lIjoiSm9obiJ9.abc123?","exampleUseCases":[{"title":"Inspect unknown token claims","prompt":"I have this JWT token and I need to know what subject, expiry, and other claims are encoded in it — can you decode it and show me the full payload? Token: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1c2VyXzQ1NiIsImV4cCI6MTcwMDAwMH0.sig"},{"title":"Check token algorithm before trusting","prompt":"Before I use this token in my app, can you tell me what signing algorithm is specified in its header? Token: eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJhZG1pbiJ9.signature"},{"title":"Debug authentication failures","prompt":"My API is rejecting this JWT and I'm not sure if it's malformed — can you decode it and tell me whether the signature field is present and what the payload says? Token: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ0ZXN0VXNlciIsInJvbGUiOiJhZG1pbiJ9.badSig"}],"resultDescription":"Returns a JSON object with ok:true and a result containing the decoded JWT header (including algorithm), the decoded payload (all claims), a boolean indicating whether a signature is present, and a boolean for whether the signature was verified.","failureModes":["Malformed or non-JWT string returns an error","Token exceeding 16384 characters rejected","Missing token field returns validation error","Signature verified flag will be false if secret not provided or known","Network or server errors on Render cold-start may cause latency spikes"],"whenToPreferThis":"Use this endpoint when you need a quick, paid-per-call JWT decode without setting up your own JWT library — especially inside an autonomous agent pipeline that already uses x402 micropayment infrastructure. Prefer it when you need to inspect token contents or check algorithm/header without access to the signing secret.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:48:04.884Z","isFirstParty":false,"canonicalSlug":"jwt-decode-inspect-e425faad"}