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JWT Decode Tool (x402 USDC Micropayment)
x402
JWT Decode Tool (x402 USDC Micropayment) is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.0001/call, status unknown (last checked 2026-09-13).
Decodes a JWT token's header and payload, returning structured claims, paid via x402 USDC micropayment on Base.
Price / call$0.0001
Success—
StatusUnknown
How this service works
Decode a JWT header and payload without verifying the signature and without calling an upstream model. Pay up to $0.001 per request with x402 USDC on Base. Public paid calls are limited to 1500 input characters and 128 output tokens.
Output
Returns a JSON object with ok (boolean), tool name ('jwtDecode'), the decoded JWT header and payload as parsed JSON fields, and a fetchedAt timestamp indicating when the decode occurred.
Example use cases
Example prompt
“Can you decode this JWT for me and show me what's in the header and payload? Token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c”
Technical details
Endpoint
GEThttps://gpt55.558686.xyz/v1/tools/jwt-decodeWhen to prefer
Use this endpoint when you need a quick, low-cost ($0.0001 USDC) way to decode and inspect JWT token contents without a subscription, especially in an x402-enabled micropayment workflow on Base. Prefer it over local JWT libraries when operating in agent environments that already support x402 payments and need a simple HTTP call.
Side effects
- Missing or empty 'token' query parameter returns an error
- Malformed JWT string (not three base64 segments) returns a decode error
- Token too long (exceeds 20000 chars) is rejected by schema validation
- Network or payment failure via x402 protocol causes request to fail
- Invalid USDC payment on Base results in 402 payment required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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