80trust / 100

Jwt Verify

by Tanod utilpeek in Security & trust

x402 APIPassing, checked 48 min ago

utilpeek (Tanod) JWT verifier: signature, expiry, audience and issuer checks with a secret, PEM key or JWK Set. Use when an agent must check a JWT's signature and exp, aud and iss with a secret, a PEM key or a JWK Set.

POST https://tanod.dev/v1/jwt/verify

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
272 ms typical, 783 ms slowest 5%
Last check
48 min ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://tanod.dev/v1/jwt/verify" \
  -H "content-type: application/json" \
  -d '{"algorithms":["HS256"],"audience":"my-api","issuer":"https://issuer.example","leeway_seconds":30,"secret":"example-secret-0123456789-abcdefghij","token":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c2VyLTEiLCJpc3MiOiJodHRwczovL2lzc3Vlci5leGFtcGxlIiwiYXVkIjoibXktYXBpIn0.Bs7wb0VmtI_D9e_qlTg31APe-kCTDCuSKUIuEPRf3BY"}'
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%2Ftanod.dev%2Fv1%2Fjwt%2Fverify
const res = await pay("https://tanod.dev/v1/jwt/verify", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"algorithms":["HS256"],"audience":"my-api","issuer":"https://issuer.example","leeway_seconds":30,"secret":"example-secret-0123456789-abcdefghij","token":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c2VyLTEiLCJpc3MiOiJodHRwczovL2lzc3Vlci5leGFtcGxlIiwiYXVkIjoibXktYXBpIn0.Bs7wb0VmtI_D9e_qlTg31APe-kCTDCuSKUIuEPRf3BY"}),
});
console.log(await res.json());

Example input

{
  "algorithms": [
    "HS256"
  ],
  "audience": "my-api",
  "issuer": "https://issuer.example",
  "leeway_seconds": 30,
  "secret": "example-secret-0123456789-abcdefghij",
  "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJ1c2VyLTEiLCJpc3MiOiJodHRwczovL2lzc3Vlci5leGFtcGxlIiwiYXVkIjoibXktYXBpIn0.Bs7wb0VmtI_D9e_qlTg31APe-kCTDCuSKUIuEPRf3BY"
}

Example output

{
  "alg": "HS256",
  "detail": "the signature does not match this key",
  "key_source": "secret",
  "kid": null,
  "note": "Signature and the claims you asked about were checked with PyJWT. Algorithm none is refused, and the accepted algorithms follow the key type. exp, nbf and iat are checked; aud and iss when given.",
  "reason": "bad_signature",
  "valid": false
}

Security scan

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