Quotes Latest

{
  "data": [
    {
      "base_token": {
        "address": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
        "name": "Wrapped Ether",
        "symbol": "WETH"
      },
      "contract_address": "0x0d4a11d5eeaac28ec3f61d100daf4d40471f1852",
      "dex": {
        "name": "Uniswap V2",
        "slug": "uniswap-v2"
      },
      "id": 12345,
      "last_updated": "2026-02-26T10:20:00.000Z",
      "liquidity": 45000000,
      "pair_created_at": "2020-05-04T11:30:00.000Z",
      "platform": {
        "name": "Ethereum",
        "network_id": 1
      },
      "quote": {
        "USD": {
          "depth_negative_two": 3500000,
          "depth_positive_two": 3200000,
          "last_updated": "2026-02-26T10:20:00.000Z",
          "percent_change_1h": 0.08,
          "percent_change_24h": 1.9,
          "price": 2072.28,
          "volume_24h": 85000000
        }
      },
      "quote_token": {
        "address": "0xdac17f958d2ee523a2206206994597c13d831ec7",
        "name": "Tether USD",
        "symbol": "USDT"
      }
    }
  ],
  "status": {
    "credit_count": 1,
    "elapsed": 18,
    "error_code": 0,
    "error_message": "",
    "timestamp": "2026-02-26T10:20:05.000Z"
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://pro-api.coinmarketcap.com/x402/v4/dex/pairs/quotes/latest?network_id=1&pair_address=0x0d4a11d5eeaac28ec3f61d100daf4d40471f1852'

# 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://pro-api.coinmarketcap.com/x402/v4/dex/pairs/quotes/latest?network_id=1&pair_address=0x0d4a11d5eeaac28ec3f61d100daf4d40471f1852' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fpro-api.coinmarketcap.com%2Fx402%2Fv4%2Fdex%2Fpairs%2Fquotes%2Flatest
const res = await pay("https://pro-api.coinmarketcap.com/x402/v4/dex/pairs/quotes/latest?network_id=1&pair_address=0x0d4a11d5eeaac28ec3f61d100daf4d40471f1852");
console.log(res.status, await res.text());

# 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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://pro-api.coinmarketcap.com/x402/v4/dex/pairs/quotes/latest?network_id=1&pair_address=0x0d4a11d5eeaac28ec3f61d100daf4d40471f1852")
    print(res.status_code, res.text)