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JWT Forensics Workflow
x402
JWT Forensics Workflow is a paid API for AI agents from agent402.tools, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Decodes a JWT, renders human-readable time claims, computes expiry duration, and optionally verifies an HMAC signature in a single bundled call
Price / call$0.05
Success—
StatusUnknown
How this service works
Bundled execution of the JWT forensics workflow - Someone hands you a JWT and asks 'is this valid?' Decode without verification first to see the shape, render the time claims (iat/nbf/exp) in human time, compute exactly how long until expiry, then...
Output
Returns the decoded JWT header and payload, all time claims (iat, nbf, exp) rendered as human-readable timestamps, a computed duration until token expiry, and a signature verification result if a secret was provided
Example use cases
Example prompt
“Can you inspect this JWT for me — eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c — decode it, show me the time claims in human-readable format, compute exactly how long until it expires, and verify the signature against my secret 'mysecretkey'.”
Technical details
Endpoint
POSThttps://agent402.tools/api/skill/jwt-forensicsWhen to prefer
Choose this endpoint when you need a complete JWT analysis in one call — decoding, human-readable time rendering, expiry computation, and optional HMAC verification — rather than calling separate decode or verify utilities individually. Ideal for debugging authentication issues, auditing tokens, or building agent workflows that need to reason about token validity.
Side effects
- Malformed JWT (not three dot-separated base64url segments) returns a parse error
- Invalid or missing secret causes signature verification step to fail or be skipped
- Already-expired token will show negative time-to-expiry
- Non-HMAC algorithms (e.g. RS256) cannot be verified with a shared secret
- Payment failure (402) if USDC balance is insufficient
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| token | string | The JWT to inspect (three dot-separated base64url segments) |
| secret | string | Shared HMAC secret to verify the signature against (only used in step 4) |
Output
Schema · Response
{
"type": "json",
"example": {
"args": {
"token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJhZ2VudDQwMiIsIm5hbWUiOiJkZW1vIGFnZW50IiwiaWF0IjoxNzAwMDAwMDAwLCJleHAiOjk5OTk5OTk5OTl9.NqggPBGuLX1OA7YuSlQ4S0INJfCOWnwXWT0XUIUrt3s",
"secret": "my-secret"
},
"pack": "jwt-forensics",
"steps": [
{
"ok": true,
"slug": "jwt-decode",
"result": {}
},
{
"ok": true,
"slug": "time-convert",
"result": {}
},
{
"ok": true,
"slug": "date-diff",
"result": {}
},
{
"ok": true,
"slug": "jwt-verify",
"result": {}
},
{
"ok": true,
"slug": "base64",
"result": {}
},
{
"ok": true,
"slug": "hash",
"result": {}
}
],
"summary": "6/6 steps succeeded"
}
}Tags
x402
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