ToolVet
75trust / 100

Data Cross Chain Compare

by api.cortexcloud.org in Onchain & crypto

x402 APIPassing, checked 2 h ago

Compare one contract across chains (price, activity, deployment) in one call (Alchemy + CoinGecko). x402-paid.

POST
https://api.cortexcloud.org/v1/data/cross-chain-compare
Price
$0.04
per call in USDC
Uptime
100%
last 30 days
Response time
714 ms
1.0 s 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://api.cortexcloud.org/v1/data/cross-chain-compare

Each call costs $0.04 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.cortexcloud.org/v1/data/cross-chain-compare
content-type: application/json

{
  "chains": [
    "ethereum",
    "base",
    "arbitrum"
  ],
  "contract": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
}

Parameters

ParameterTypeRequiredDescription
chainsarray of stringNo Default: ["ethereum","base","arbitrum","polygon","optimism"].
contractstringYes

Example response

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

{}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.04.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.cortexcloud.org/v1/data/cross-chain-compare' \
  -H 'content-type: application/json' \
  --data-raw '{"chains":["ethereum","base","arbitrum"],"contract":"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://api.cortexcloud.org/v1/data/cross-chain-compare' \
  -H 'content-type: application/json' \
  --data-raw '{"chains":["ethereum","base","arbitrum"],"contract":"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 $0.04 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.04" });
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 $0.04 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.cortexcloud.org%2Fv1%2Fdata%2Fcross-chain-compare&method=POST
const res = await pay("https://api.cortexcloud.org/v1/data/cross-chain-compare", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "chains": [
      "ethereum",
      "base",
      "arbitrum"
    ],
    "contract": "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 $0.04 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.04"})
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.cortexcloud.org/v1/data/cross-chain-compare",
        json={
            "chains": [
                "ethereum",
                "base",
                "arbitrum",
            ],
            "contract": "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 agoPassed402333 ms$0.04
6 h agoPassed402813 ms$0.04
11 h agoPassed402291 ms$0.04
16 h agoPassed4021.0 s$0.04
20 h agoPassed402280 ms$0.04
Show 10 older checks
24 h agoPassed402707 ms$0.04
28 h agoPassed402760 ms$0.04
33 h agoPassed402895 ms$0.04
37 h agoPassed402728 ms$0.04
41 h agoPassed402744 ms$0.04
45 h agoPassed402733 ms$0.04
2 days agoPassed4021.1 s$0.04
2 days agoPassed402763 ms$0.04
2 days agoPassed402779 ms$0.04
3 days agoPassed402714 ms$0.04