ToolVet
16trust / 100

Jwt Verify

by Vextorium in Security & trust

x402 APIFailing, checked 1 h ago

Decode a JWT and verify its signature with the public keys of a JWKS URL (RS256, ES256, EdDSA...) or an HMAC secret, checking expiry, audience and issuer; returns header, claims and the exact reason if invalid. Tokens are not stored.

POST https://api.vextorium.com/v1/jwt-verify

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
0.0%
Response time
- typical, - slowest 5%
Last check
1 h ago: Amount "0.003" is not in atomic token units
Next check
any minute now

How to call it

# bash or zsh: see the payment challenge (nothing is charged)
curl -g -i -X POST 'https://api.vextorium.com/v1/jwt-verify' \
  -H 'content-type: application/json' \
  --data-raw '{"token":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"}'
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.vextorium.com%2Fv1%2Fjwt-verify
const res = await pay("https://api.vextorium.com/v1/jwt-verify", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: "{\"token\":\"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c\"}",
});
console.log(await res.json());

Example input

{
  "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"
}

Example output

{
  "algorithm": "HS256",
  "content": {
    "iat": 1516239022,
    "name": "John Doe",
    "sub": "1234567890"
  },
  "header": {
    "alg": "HS256",
    "typ": "JWT"
  },
  "reason": "No jwks_url or secret: decoded only, signature NOT verified.",
  "valid": null
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
1 h agoAmount "0.003" is not in atomic token units402146 ms$0.003
6 h agoAmount "0.003" is not in atomic token units40279 ms$0.003
10 h agoAmount "0.003" is not in atomic token units40278 ms$0.003
14 h agoAmount "0.003" is not in atomic token units40289 ms$0.003
19 h agoAmount "0.003" is not in atomic token units40287 ms$0.003
23 h agoAmount "0.003" is not in atomic token units40276 ms$0.003
27 h agoAmount "0.003" is not in atomic token units40274 ms$0.003
31 h agoAmount "0.003" is not in atomic token units40279 ms$0.003
35 h agoAmount "0.003" is not in atomic token units40289 ms$0.003
39 h agoAmount "0.003" is not in atomic token units402154 ms$0.003
43 h agoAmount "0.003" is not in atomic token units40282 ms$0.003
47 h agoAmount "0.003" is not in atomic token units40282 ms$0.003
2 days agoAmount "0.003" is not in atomic token units402124 ms$0.003
2 days agoAmount "0.003" is not in atomic token units40280 ms$0.003
2 days agoAmount "0.003" is not in atomic token units40279 ms$0.003