Crypto market overview

Top N coins by market capitalization with full market snapshot per coin: rank, price, 24h change, 7d change, 24h volume, market cap, circulating supply, and all-time high. Default 10, max 100 per call. Backed by CoinGecko's public API.

Input

Example output

{
  "currency": "usd",
  "count": 2,
  "coins": [
    {
      "rank": 1,
      "id": "bitcoin",
      "symbol": "btc",
      "name": "Bitcoin",
      "price": 67234.12,
      "change24hPct": 1.42,
      "change7dPct": 4.81,
      "volume24h": 28100000000,
      "marketCap": 1320000000000,
      "circulatingSupply": 19700000,
      "ath": 73750,
      "athDate": "2024-03-14T07:10:36Z"
    },
    {
      "rank": 2,
      "id": "ethereum",
      "symbol": "eth",
      "name": "Ethereum",
      "price": 3520.45,
      "change24hPct": 2.18,
      "change7dPct": 1.92,
      "volume24h": 14200000000,
      "marketCap": 423000000000,
      "circulatingSupply": 120300000,
      "ath": 4878.26,
      "athDate": "2021-11-10T14:24:11Z"
    }
  ]
}

Try it - see the 402 challenge (free)

curl -i "https://agent402.tools/api/crypto-market?limit=10&currency=usd"

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

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();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/crypto-market?limit=10&currency=usd");

Part of these workflows

This tool is one step in 3 curated multi-tool workflows - agents can fetch the whole sequence as an MCP prompt or call https://agent402.tools/api/skill-packs/{slug}/prompt.

• DeFi protocol scanner - Due-diligence a DeFi protocol in one workflow: live token price, market context, protocol TVL across chains, and recent news - the on-chain and off-chain picture together.
• Macro dashboard refresh - The full macro + crypto dashboard in one call: 5 FRED series, 5 Treasury reads, yield-curve spread, crypto market/trending/global, and live gas - the 14-tool basket recurring buyers refresh every cycle, bundled below its a la carte price.
• Crypto research - Pull live price, market structure, OHLC history, trending status, global market context, and recent news for a single coin in one pass.

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