ToolVet
15trust / 100

Dex Par Pago

by Vextorium in Onchain & crypto

x402 APIFailing, checked 1 h ago

Trading pairs for a token across all chains (by symbol, name or address): price, 24h/1h change, on-chain liquidity, 24h volume, market cap, DEX and chain. Filter by chain (use the token address for a precise per-chain view). Live from DEX Screener.

POST
https://api.vextorium.com/dex-par-pago
Price
$0.005
per call in USDC
Uptime
0.0%
last 30 days
Response time
-
no timed checks yet
Last check
Failed
1 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 1 h ago: Expected HTTP 402, got 503

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://api.vextorium.com/dex-par-pago

Each call costs $0.005 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/dex-par-pago
content-type: application/json

{
  "cadena": "base",
  "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}

Parameters

ParameterTypeRequiredDescription
cadenastringNoFilter by chain, e.g. base, solana, ethereum (optional)
limiteintegerNoPairs to return (1-30, default 6)
tokenstringYesToken symbol, name or address

Example response

The provider's example. We can't check it without paying.

{
  "cadena": "base",
  "consulta": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "encontrados": 1,
  "fuente": "DEX Screener (api.dexscreener.com, datos abiertos)",
  "nota": "Pares ordenados por liquidez. Liquidez baja = más riesgo de manipulación. No es recomendación de inversión.",
  "pares": [
    {
      "cadena": "base",
      "cambio_1h_pct": -0.01,
      "cambio_24h_pct": -0.01,
      "capitalizacion_usd": 60893549651,
      "dex": "quickswap",
      "direccion_token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "enlace": "https://dexscreener.com/base/0x5d0bc342178c8fe2c2f9a9fcc9d52555c99936db",
      "liquidez_usd": 108600,
      "par": "USDC/USDbC",
      "precio_usd": 0.9998,
      "volumen_24h_usd": 173389
    }
  ]
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

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/dex-par-pago' \
  -H 'content-type: application/json' \
  --data-raw '{"cadena":"base","token":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"}'

# 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/dex-par-pago' \
  -H 'content-type: application/json' \
  --data-raw '{"cadena":"base","token":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.vextorium.com%2Fdex-par-pago&method=POST
const res = await pay("https://api.vextorium.com/dex-par-pago", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "cadena": "base",
    "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
  }),
});
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
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/dex-par-pago",
        json={
            "cadena": "base",
            "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        },
    )
    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

WhenResultHTTPTimePrice
1 h agoExpected HTTP 402, got 503503314 ms-
6 h agoAmount "0.005" is not in atomic token units402130 ms$0.005
11 h agoAmount "0.005" is not in atomic token units402168 ms$0.005
16 h agoAmount "0.005" is not in atomic token units402278 ms$0.005
21 h agoAmount "0.005" is not in atomic token units402103 ms$0.005
Show 10 older checks
26 h agoAmount "0.005" is not in atomic token units402108 ms$0.005
31 h agoAmount "0.005" is not in atomic token units402109 ms$0.005
35 h agoAmount "0.005" is not in atomic token units40288 ms$0.005
40 h agoAmount "0.005" is not in atomic token units40295 ms$0.005
45 h agoAmount "0.005" is not in atomic token units402143 ms$0.005
2 days agoAmount "0.005" is not in atomic token units402264 ms$0.005
2 days agoAmount "0.005" is not in atomic token units402148 ms$0.005
2 days agoAmount "0.005" is not in atomic token units40291 ms$0.005
3 days agoAmount "0.005" is not in atomic token units40279 ms$0.005
3 days agoAmount "0.005" is not in atomic token units40279 ms$0.005