Token price by contract address

Live price, market cap, 24h volume and 24h change for ERC-20 / SPL / other chain tokens looked up by CONTRACT ADDRESS on a named platform (ethereum, base, polygon-pos, arbitrum-one, optimistic-ethereum, binance-smart-chain, solana, avalanche, ...). Send GET /api/coin-price-by-contract with the required fields platform and contracts and pay $0.005 per call over x402 or MPP (there is no free tier). It returns a JSON object with source, fetchedAt, cached, platform, currency and 2 more.

Up to 25 contracts per call, any vs currency (default usd). The address-first sibling of crypto-price: use it when an agent holds a token address from a wallet, a DEX pair or a contract scan and has no coin id. Unknown addresses come back as null rather than failing the batch. Responses are cached in-process for 60 seconds.

Category: Crypto & onchain data · Tags: crypto token price contract erc20 evm solana market-data

TRY IN PLAYGROUND →

Parameters

Example request

curl -i "https://agent402.tools/api/coin-price-by-contract?platform=ethereum&contracts=0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48&currency=usd"

Without payment this returns HTTP 402 Payment Required with the exact price for coin-price-by-contract; any x402 v2 or MPP client pays it and retries.

Example response

{
  "source": "coingecko",
  "fetchedAt": "2026-08-22T13:20:00.000Z",
  "cached": false,
  "platform": "ethereum",
  "currency": "usd",
  "count": 1,
  "tokens": [
    {
      "contract": "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48",
      "price": 0.999916,
      "marketCap": 73514026487.98,
      "volume24h": 26092767405.46,
      "change24hPct": 0.0212,
      "lastUpdated": "2026-08-22T13:15:40.000Z"
    }
  ]
}

From an MCP client

catalog.call {
  "slug": "coin-price-by-contract",
  "params": {
    "platform": "ethereum",
    "contracts": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    "currency": "usd"
  }
}

The hosted connector at https://agent402.tools/mcp needs a payment for coin-price-by-contract; the stdio package pays it from a wallet or from AGENT402_CREDITS_KEY. Local install: npx -y agent402-mcp.

Errors and behavior

• platform and contracts are required. An input the tool rejects returns an HTTP 4xx whose body carries error, tool, expected, required and example, so the caller can correct it.
• A paid call that ends in any status of 400 or above is not charged over x402, MPP or a prepaid credits key: settlement is cancelled when the tool fails. The exception is a Tempo push credential, a transfer the buyer sent before the call: it settles before the tool runs, so if the tool then fails the payment is recorded as a refund owed to the paying wallet.
• Wallet-only: this tool reaches the network or stored state, so it has no proof-of-work tier. A prepaid card-credits key issued earlier (Authorization: Bearer a402_...) also pays it.
• A POST with a JSON body to /api/coin-price-by-contract is served as this GET, with the body as the input.
• An Idempotency-Key header makes a retried paid call replay the first 200 instead of charging again (an answer larger than 1 MB is not replayed).

Paid call (JavaScript agent)

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

const client = new x402Client();
client.setSpendControls?.(false); // keep your own spending ceiling in code
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/coin-price-by-contract?platform=ethereum&contracts=0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48&currency=usd");

Related tools