{"uid":"cap_KnOhIUoKf5XP3YZoCpHt9","slug":"jwt-decoder-43b5904f","name":"JWT Decoder","description":"Decode a JWT — parse header and payload claims without a key (no signature verification).","url":"https://conclavex402.pythonanywhere.com/u/jwt?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"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"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"pathParams":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","additionalProperties":{"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"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_LCu3YZNbfly5JTK7NakWi","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Decodes a JWT token by parsing its header and payload claims without performing signature verification.","exampleAgentPrompt":"Can you decode this JWT for me and show me what's in the header and payload: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c","exampleUseCases":[{"title":"Debugging an expired auth token","prompt":"I'm getting a 401 error and want to check what's inside this JWT to see its expiry and subject — can you decode it for me: eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c2VyXzEyMyIsImV4cCI6MTY5MDAwMDAwMH0.abc123"},{"title":"Inspecting algorithm used in token","prompt":"Can you parse this JWT and tell me what signing algorithm is listed in the header: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJkYXRhIjoidGVzdCJ9.xyz"},{"title":"Extracting user claims from token","prompt":"I need to read the user ID and roles out of this JWT without verifying the signature — just parse the payload: eyJhbGciOiJub25lIiwidHlwIjoiSldUIn0.eyJzdWIiOiJ1c2VyXzQ1NiIsInJvbGVzIjpbImFkbWluIl19."}],"resultDescription":"Returns a JSON object with two fields: 'header' containing the decoded JWT header claims (e.g. alg, typ) and 'payload' containing the decoded JWT payload claims (e.g. sub, iat, exp, custom claims). No signature verification is performed.","failureModes":["Malformed or non-JWT string input returns an error","Missing required 'input' body field causes validation failure","Token with invalid base64url encoding in header or payload fails to decode","Passing an empty string or non-string JWT value returns an error"],"whenToPreferThis":"Use this endpoint when you need to quickly inspect or extract the header and payload claims from a JWT token without needing to verify its signature — ideal for debugging, logging, or reading claims in a trusted internal context. Not appropriate when signature verification is required for security enforcement.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T06:40:43.857Z","isFirstParty":false,"canonicalSlug":"jwt-decoder-43b5904f"}