{"uid":"cap_eQcM33Tw3SzzVebxy6zNB","slug":"jwt-decode-inspection-cbc6bedf","name":"JWT Decode & Inspection","description":"Paid x402 utilities and live intelligence for autonomous agents: hashing/encoding plus public web lookup, domain intelligence, API discovery audit, evidence extraction and x402 health.","url":"https://capi2-demand-tools.onrender.com/v1/jwt/decode","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"token":{"type":"string","minLength":3,"description":"JWT compact serialization."}}},"responseSchema":{"type":"json","example":{"header":{"alg":"none"},"payload":{"sub":"123"},"verified":false,"signature_present":false}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0005","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":"$0.0005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wWHtMiw4FYXb2MWzb9EdK","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Decodes a JWT compact serialization into its header, payload, and signature components without requiring a secret key","exampleAgentPrompt":"Can you decode this JWT for me and show me what's in the header and payload? Here's the token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c","exampleUseCases":[{"title":"Debug a broken auth flow","prompt":"I'm getting a 401 and I want to see what's actually inside this JWT my server issued — can you decode it so I can check the claims? Token: eyJhbGciOiJub25lIn0.eyJzdWIiOiJ1c2VyXzEyMyIsInJvbGUiOiJhZG1pbiJ9."},{"title":"Inspect JWT algorithm and header","prompt":"Can you decode this JWT and tell me what signing algorithm it uses in the header? eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6ImFiYzEyMyJ9.eyJpc3MiOiJodHRwczovL2V4YW1wbGUuY29tIn0."},{"title":"Extract user identity claims","prompt":"Pull out the sub, email, and expiry from this JWT so I can see which user it belongs to: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1c2VyXzQ1NiIsImVtYWlsIjoidGVzdEBleGFtcGxlLmNvbSIsImV4cCI6MTcwMDAwMDAwMH0.abc123"}],"resultDescription":"Returns a JSON object containing the decoded JWT header (including algorithm), decoded payload (all claims), a boolean indicating whether a signature is present, and a verified flag showing whether the signature was cryptographically validated.","failureModes":["Malformed JWT string that cannot be parsed returns an error","Token shorter than 3 characters is rejected by schema validation","Tokens with non-standard encoding may fail to decode","Payment required (x402) if micropayment not attached","Network timeout from the Render-hosted service"],"whenToPreferThis":"Choose this endpoint when you need to quickly inspect the contents of a JWT token without needing a signing secret — ideal for debugging, auditing claims, or extracting payload data in agent workflows. It is paid via x402 micropayment ($0.0005 USDC), making it suitable for low-volume programmatic use where a lightweight serverless utility is preferred over running a JWT library locally.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:35:42.208Z","isFirstParty":false}