Verificar Jwt Pago
by Vextorium in Security & trust
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/verificar-jwt-pago
Last 30 days
Status and outage history · Atom feed
- Uptime
- 0.0%
- Response time
- - typical, - slowest 5%
- Last check
- 4 h ago: Amount "0.003" is not in atomic token units
- Next check
- any minute now
How to call it
POST https://api.vextorium.com/verificar-jwt-pago
Each call costs $0.003 in USDC on Base, paid with the request over x402.
Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.
Example request
From the listing.
POST https://api.vextorium.com/verificar-jwt-pago
content-type: application/json
{
"token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"
}Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
audiencia | string | No | |
emisor | string | No | |
jwks_url | string | No | |
secreto | string | No | |
token | string | Yes |
Example response
The provider's example. We can't check it without paying.
{
"algoritmo": "HS256",
"cabecera": {
"alg": "HS256",
"typ": "JWT"
},
"contenido": {
"iat": 1516239022,
"name": "John Doe",
"sub": "1234567890"
},
"motivo": "Sin jwks_url ni secreto: solo decodificado, firma NO verificada.",
"valido": null
}Call it from code
The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.003.
curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.vextorium.com/verificar-jwt-pago' \
-H 'content-type: application/json' \
--data-raw '{"token":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"}'
# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://api.vextorium.com/verificar-jwt-pago' \
-H 'content-type: application/json' \
--data-raw '{"token":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"}' \
| grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decodeJavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
// Pays at most $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);
// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.vextorium.com%2Fverificar-jwt-pago&method=POST
const res = await pay("https://api.vextorium.com/verificar-jwt-pago", {
method: "POST",
headers: { "content-type": "application/json" },
body: JSON.stringify({
"token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"
}),
});
console.log(res.status, await res.text());Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client
# Pays at most $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))
with x402_requests(client) as session:
res = session.post(
"https://api.vextorium.com/verificar-jwt-pago",
json={
"token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c",
},
)
print(res.status_code, res.text)Security scan
- No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.
Recent checks
| When | Result | HTTP | Time | Price |
|---|---|---|---|---|
| 4 h ago | Amount "0.003" is not in atomic token units | 402 | 96 ms | $0.003 |
| 9 h ago | Amount "0.003" is not in atomic token units | 402 | 82 ms | $0.003 |
| 13 h ago | Amount "0.003" is not in atomic token units | 402 | 81 ms | $0.003 |
| 17 h ago | Amount "0.003" is not in atomic token units | 402 | 78 ms | $0.003 |
| 22 h ago | Amount "0.003" is not in atomic token units | 402 | 79 ms | $0.003 |
| 26 h ago | Amount "0.003" is not in atomic token units | 402 | 76 ms | $0.003 |
| 30 h ago | Amount "0.003" is not in atomic token units | 402 | 331 ms | $0.003 |
| 34 h ago | Amount "0.003" is not in atomic token units | 402 | 74 ms | $0.003 |
| 38 h ago | Amount "0.003" is not in atomic token units | 402 | 109 ms | $0.003 |
| 42 h ago | Amount "0.003" is not in atomic token units | 402 | 73 ms | $0.003 |
| 46 h ago | Amount "0.003" is not in atomic token units | 402 | 79 ms | $0.003 |
| 2 days ago | Amount "0.003" is not in atomic token units | 402 | 112 ms | $0.003 |
| 2 days ago | Amount "0.003" is not in atomic token units | 402 | 82 ms | $0.003 |
| 2 days ago | Amount "0.003" is not in atomic token units | 402 | 270 ms | $0.003 |
| 3 days ago | Amount "0.003" is not in atomic token units | 402 | 214 ms | $0.003 |