Crypto Price Lookup

Crypto prices in USD and other currencies. Three modes: (1) coins as CoinGecko IDs or tickers (up to 50) for live price, 24h change and market cap in the requested currencies; (2) tokens as chain:address (e.g. base:0x833589fC…, ethereum:0x6982…) for any DEX-traded token; (3) at (past ISO date or unix seconds) for historical USD prices of coins and tokens. Params: coins, tokens, currencies (default ['usd']), at.

Run free trial ↗3 free calls per day with the example input. Paid: $0.002 USDC, no limit.

Call it

import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agentsvc.io/api/v1/proxy/crypto-prices", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({"coins":["bitcoin","ethereum"],"currencies":["usd"]}),
});
const { data, payment } = await res.json();  // payment.transaction = on-chain receipt

Input

Field	Type	Description
tokens	array	Tokens as chain:address, e.g. base:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
at	string	Past ISO date or unix seconds for historical USD prices
coins	array	List of coin IDs or ticker symbols. Accepts CoinGecko IDs (e.g. 'bitcoin', 'ethereum') or common tickers (e.g. 'BTC', 'ETH', 'SOL'). Max 25 coins per call.
currencies	array = ["usd"]	Target fiat currencies. Default: ['usd']. Supported: usd, eur, gbp, jpy, chf, aud, cad, btc, eth.

Output

Field	Type	Description
prices	object	Map of coin_id → price data. Each entry contains price(s) in requested currencies, 24h change, and market cap.
fetched_at	string	ISO 8601 timestamp of the data
source	string	Always: 'CoinGecko'
not_found	array	Coin IDs or tickers that could not be resolved

Example response (data)

{
  "prices": {
    "bitcoin": {
      "name": "Bitcoin",
      "symbol": "BTC",
      "usd": 71923,
      "usd_24h_change": 1.42,
      "usd_market_cap": 1419000000000
    },
    "ethereum": {
      "name": "Ethereum",
      "symbol": "ETH",
      "usd": 2188,
      "usd_24h_change": 0.41,
      "usd_market_cap": 263000000000
    }
  },
  "fetched_at": "2026-04-10T14:00:00.000Z",
  "source": "CoinGecko",
  "not_found": []
}