ToolVet
80trust / 100

Token Prices

by x402engine.app in Onchain & crypto

x402 APIPassing, checked 2 h ago

x402engine — Real-time DEX-derived token prices with OHLC data — up to 200 tokens per request

POST
https://x402engine.app/api/token/prices
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
252 ms
332 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

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

How to call it

POST https://x402engine.app/api/token/prices

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://x402engine.app/api/token/prices
content-type: application/json

{
  "tokens": [
    {
      "chain": "ethereum",
      "token_address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
    }
  ]
}

Parameters

ParameterTypeRequiredDescription
tokensarray of objectYesArray of token objects with chain and token_address

Example response

The listing has no example response.

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://x402engine.app/api/token/prices' \
  -H 'content-type: application/json' \
  --data-raw '{"tokens":[{"chain":"ethereum","token_address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"}]}'

# 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://x402engine.app/api/token/prices' \
  -H 'content-type: application/json' \
  --data-raw '{"tokens":[{"chain":"ethereum","token_address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"}]}' \
  | 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%2Fx402engine.app%2Fapi%2Ftoken%2Fprices&method=POST
const res = await pay("https://x402engine.app/api/token/prices", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "tokens": [
      {
        "chain": "ethereum",
        "token_address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
      }
    ]
  }),
});
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://x402engine.app/api/token/prices",
        json={
            "tokens": [
                {
                    "chain": "ethereum",
                    "token_address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
                },
            ],
        },
    )
    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
2 h agoPassed402308 ms$0.005
7 h agoPassed402187 ms$0.005
11 h agoPassed402298 ms$0.005
15 h agoPassed402320 ms$0.005
20 h agoPassed402298 ms$0.005
Show 10 older checks
24 h agoPassed402357 ms$0.005
28 h agoPassed402281 ms$0.005
32 h agoPassed402207 ms$0.005
37 h agoPassed402282 ms$0.005
41 h agoPassed402190 ms$0.005
45 h agoPassed402231 ms$0.005
2 days agoPassed402332 ms$0.005
2 days agoPassed402187 ms$0.005
2 days agoPassed402271 ms$0.005
3 days agoPassed402252 ms$0.005