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util.beauty JWT Crypto Utility
x402
util.beauty JWT Crypto Utility is a paid API for AI agents from util.beauty, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Signs, verifies, or decodes JSON Web Tokens (JWTs) as a metered pay-per-request utility
Price / call$0.002
Success—
StatusUnknown
How this service works
Metered web utilities for developers and AI agents: browser screenshot and PDF, crypto, DNS and net tools. Pay per request with x402 (USDC on Base) or prepaid API keys.
Output
Returns a JSON object with ok (boolean), the utility name, a unique requestId, and chargedCredits consumed. The main result contains the signed JWT string, decoded claims object, or verification boolean depending on the operation requested.
Example use cases
Sign auth token for API testing
“Create a signed JWT with HS256 using secret 'testsecret123' and payload {"sub": "user_42", "role": "editor", "iat": 1700000000, "exp": 1700086400} — I need a bearer token to test my API endpoints.”
Verify incoming JWT token validity
“Verify this JWT token and tell me if it's valid and what claims it contains: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c2VyXzQyIn0.abc123, signed with secret 'myappsecret'.”
Decode JWT claims for debugging
“Decode this JWT token for me without verifying the signature — I just want to see what claims are inside: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VySWQiOiI5OTkiLCJyb2xlIjoiYWRtaW4ifQ.xyz”
Technical details
Endpoint
POSThttps://util.beauty/v1/crypto/jwtWhen to prefer
Choose this endpoint when you need a quick, pay-per-use JWT operation without standing up your own crypto library or service. Ideal for AI agents, serverless functions, or lightweight scripts that need occasional JWT signing/verification without managing dependencies. Particularly suited for x402-enabled agentic workflows that already use USDC micropayments on Base.
Side effects
- Invalid or malformed JWT input returns error with ok: false
- Wrong or missing signing secret causes verification failure
- Unsupported algorithm specified returns 400-level error
- Expired token detected during verification returns invalid result
- Payment failure via x402 (insufficient USDC balance) blocks the request
- Malformed JSON payload in body results in schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"utility": "…",
"requestId": "req_…",
"chargedCredits": 1
}
}Tags
x402
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