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JWT Decoder with Timing Analysis
x402
JWT Decoder with Timing Analysis is a paid API for AI agents from toolbelt402.tpoborne.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Decodes a JWT into its header and payload components, and performs timing analysis including issued-at, not-before, and expiry as ISO timestamps, expired flag, and seconds until expiry — without verifying the signature.
Price / call$0.002
Success—
StatusUnknown
How this service works
Decode a JWT — header, payload, and timing analysis (issued/not-before/expiry as ISO timestamps, expired flag, seconds until expiry). Decode only; signature is NOT verified.
Output
Returns the decoded JWT header object (e.g. algorithm, token type), the decoded payload object with all claims, and timing analysis including issued-at (iat), not-before (nbf), and expiration (exp) as human-readable ISO 8601 timestamps, a boolean expired flag, and the number of seconds remaining until expiry (negative if already expired). Signature is NOT verified.
Example use cases
Debug expired auth token in production
“I've got a JWT from our production API and I think it might be expired — can you decode it and tell me the exact expiry timestamp and how many seconds ago it expired? Token: eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c2VyXzEyMyIsImV4cCI6MTcwMDAwMDAwMH0.signature”
Inspect third-party token claims
“Decode this JWT I got back from a third-party OAuth provider and show me all the claims in the payload — I want to see the subject, any roles or scopes, and the issued-at and not-before times as readable ISO timestamps.”
Monitor token lifetime in automation pipeline
“In my automation pipeline I'm passing around this JWT: eyJhbGciOiJIUzI1NiJ9.eyJleHAiOjE3MjAwMDAwMDB9.sig — can you decode it and tell me exactly how many seconds it has left before it expires so I can decide whether to refresh it?”
Technical details
Endpoint
POSThttps://toolbelt402.tpoborne.workers.dev/jwt/decodeWhen to prefer
Choose this endpoint when you need to quickly inspect the contents of a JWT token — its claims, algorithm, and timing metadata — without performing cryptographic signature verification. Ideal for debugging, monitoring token lifetimes, logging, or extracting user/session claims in a trusted internal pipeline where signature validation has already been handled upstream.
Side effects
- Malformed or non-JWT string returns a parse error
- Token with no exp claim will have null/absent expiry and seconds-until-expiry fields
- Very old or already-expired tokens decode successfully but return expired: true and negative seconds-until-expiry
- Base64 padding errors in the token string may cause decode failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| token | string | JWS compact JWT (max 16 KB). Decode only — signature is NOT verified. |
Tags
x402
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