ToolVet
77trust / 100

Market Cex Arb

by market.memoryapi.org in Markets & finance

x402 APIPassing, checked 3 h ago

Cross-exchange cryptocurrency arbitrage opportunities. Find best buy/sell prices across major exchanges.

GET
https://market.memoryapi.org/x402/market/cex_arb
Price
$0.001
per call in USDC
Uptime
100%
last 30 days
Response time
383 ms
661 ms slowest 5%
Last check
Passed
3 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

How to call it

GET https://market.memoryapi.org/x402/market/cex_arb

Each call costs $0.001 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.

GET https://market.memoryapi.org/x402/market/cex_arb?coin=bitcoin&coins=bitcoin%2Cethereum%2Csolana&limit=10

Example response

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

{
  "all_exchanges": [
    {
      "name": "Binance",
      "price": 42600.75,
      "target_currency": "USDT"
    }
  ],
  "as_of": "2025-01-02T18:00:00Z",
  "best_buy": {
    "exchange": "Kraken",
    "price": 42300.5
  },
  "best_sell": {
    "exchange": "Binance",
    "price": 42600.75
  },
  "coin": "bitcoin",
  "signal": "ARBITRAGE",
  "source": "CoinGecko",
  "spread_pct": 0.7102,
  "spread_usd": 300.25,
  "success": true
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://market.memoryapi.org/x402/market/cex_arb?coin=bitcoin&coins=bitcoin%2Cethereum%2Csolana&limit=10'

# 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 - 'https://market.memoryapi.org/x402/market/cex_arb?coin=bitcoin&coins=bitcoin%2Cethereum%2Csolana&limit=10' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmarket.memoryapi.org%2Fx402%2Fmarket%2Fcex_arb
const res = await pay("https://market.memoryapi.org/x402/market/cex_arb?coin=bitcoin&coins=bitcoin%2Cethereum%2Csolana&limit=10");
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://market.memoryapi.org/x402/market/cex_arb?coin=bitcoin&coins=bitcoin%2Cethereum%2Csolana&limit=10")
    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
3 h agoPassed402426 ms$0.001
7 h agoPassed4021.1 s$0.001
12 h agoPassed402144 ms$0.001
15 h agoPassed402396 ms$0.001
19 h agoPassed402383 ms$0.001
Show 10 older checks
23 h agoPassed402358 ms$0.001
27 h agoPassed402661 ms$0.001
31 h agoPassed402399 ms$0.001
35 h agoPassed402512 ms$0.001
38 h agoPassed402119 ms$0.001
42 h agoPassed402391 ms$0.001
45 h agoPassed402376 ms$0.001
2 days agoPassed402421 ms$0.001
2 days agoPassed402499 ms$0.001
2 days agoPassed402659 ms$0.001