# HTTPay JWT Decoder

> HTTPay JWT Decoder is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Decodes a JWT token without signature verification, returning header, payload, expiry status, and token metadata

## Facts

- Endpoint: POST https://httpay.xyz/api/jwt-decode
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/httpay-jwt-decoder-0813037a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u9k7bef4EMoiVYczaAQQF

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability httpay-jwt-decoder-0813037a -d '<json body>'
```

Example prompt: Can you decode this JWT for me and tell me what's in the payload and whether it's expired: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c

## When to prefer this

Use this endpoint when you need to quickly inspect the contents of a JWT — its claims, expiry, header, and metadata — without needing to verify the cryptographic signature. Ideal for debugging, logging, or extracting user claims from a known-trusted token.

## Known failure modes

- Invalid or malformed JWT string returns an error
- Missing token field in POST body returns a validation error
- Network or payment failure prevents the call from completing
- Token with unsupported encoding may fail to decode

## How this service works

307 pay-per-call APIs (287 native + Universal Gateway proxying 37 services) powered by x402 and USDC on Base. Token intelligence, DeFi yields, MEV risk, AI tools, web scraping. No API keys, no subscriptions — pay $0.001–$0.05 per call.

## Output

Returns the decoded JWT header object, payload object, expiry status (expired or valid), and token metadata such as algorithm and token type — without performing cryptographic signature verification

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "description": "Decode a JWT (JSON Web Token) without signature verification. POST JSON: {token}. Returns header, payload, expiry status, and token metadata. Uses Node.js Buffer."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/httpay-jwt-decoder-0813037a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from httpay.xyz](https://www.zero.xyz/host/httpay.xyz/llms.txt)