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JWT Toolkit – Decode
x402
JWT Toolkit – Decode is a paid API for AI agents from jwt.openverbs.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-14).
Decodes a compact JWS/JWT string and returns its header, payload, and signature components without verification
Price / call$0.004
Success—
StatusUnknown
How this service works
Decode a JSON Web Token WITHOUT verifying its signature and return the header, payload and signature. A structurally malformed token is rejected before payment. Never trust a decoded payload you have not verified.
Output
Returns the decoded components of the JWT: the header (algorithm, token type), the payload (all claims such as sub, iat, exp, roles, custom data), and the raw signature section — without performing cryptographic signature verification.
Example use cases
Inspect expiring access token claims
“I have this access token and I want to know when it expires and what permissions it has — can you decode it for me? eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c2VyXzEyMyIsInNjb3BlIjoicmVhZDp3cml0ZSIsImV4cCI6MTcxMDAwMDAwMH0.signature”
Debug broken authentication flow
“My app is rejecting this JWT but I don't know what's wrong with it — can you parse it and tell me what's in the header and payload? eyJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjo0Miwicm9sZSI6ImFkbWluIn0.abc123”
Extract user identity from bearer token
“I received this bearer token from the OAuth server and need to know which user it belongs to and what their role is — please decode it: eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJhbGljZUBleGFtcGxlLmNvbSIsInJvbGUiOiJlZGl0b3IifQ.sig”
Technical details
Endpoint
POSThttps://jwt.openverbs.com/v1/decodeWhen to prefer
Choose this endpoint when you need to quickly inspect the contents of a JWT/JWS token without needing cryptographic signature verification — useful for debugging, logging claims, extracting user identity, or reading expiration times. If you need to cryptographically verify the token signature against a public key or JWKS endpoint, this decode-only endpoint is not sufficient and you should look for a JWT verify endpoint instead.
Side effects
- Malformed JWT string (not three dot-separated base64url segments) returns a parse error
- Empty or missing token field returns a validation error
- Token exceeds 32768 character maximum length
- Non-JWT string input (e.g. opaque token or API key) cannot be decoded
- Network or payment authorization failure returns HTTP 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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