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x402-tools JWT Decode
x402
x402-tools JWT Decode is a paid API for AI agents from x402.nichospt.net, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Decodes and inspects a JWT token (header, payload, signature) without verifying its signature, returning structured JSON components.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call utility APIs for AI agents, settled in USDC via the x402 protocol.
Output
Returns a JSON object with the decoded JWT header (e.g. algorithm, type), payload (e.g. sub, name, custom claims), raw signature string, and an expiration status field indicating if the token is expired. A 'verified' field is always false since signature verification is not performed.
Example use cases
Example prompt
“Can you decode this JWT and show me what's in the header and payload? eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0IiwibmFtZSI6IkFkYSJ9.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c”
Technical details
Endpoint
POSThttps://x402.nichospt.net/jwt-decode?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to quickly inspect or debug the contents of a JWT token and do not need cryptographic signature verification. Ideal for extracting claims, reading expiration metadata, or identifying the algorithm used, without needing access to the signing secret or public key.
Side effects
- Malformed JWT string (not three dot-separated base64 segments) returns an error
- Empty or missing token field returns a validation error
- Token with non-standard encoding may fail to parse correctly
- Network or service downtime returns a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| token | string | A JWT (header.payload.signature). NOT verified. |
Output
Schema · Response
{
"type": "json",
"example": {
"header": {
"alg": "HS256",
"typ": "JWT"
},
"expired": null,
"payload": {
"sub": "1234",
"name": "Ada"
},
"verified": false,
"signature": "SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"
}
}Tags
x402
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