Crypto categories by market cap

Coin categories (Layer 1, Meme, AI, DeFi, Stablecoins, RWA, ...) ranked by market cap, with 24h market cap change %, 24h volume and the top-3 coins per category. Order by market_cap_desc (default), market_cap_asc, market_cap_change_24h_desc/asc, name_asc/desc; optional `query` substring filter on category name/id; limit 1-100 (default 25). The sector-rotation view: which narratives are gaining or bleeding today. Cached in-process for 5 minutes.

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Input

Example output

{
  "source": "coingecko",
  "fetchedAt": "2026-08-22T13:20:00.000Z",
  "cached": false,
  "order": "market_cap_desc",
  "count": 1,
  "totalCategories": 400,
  "categories": [
    {
      "rank": 1,
      "id": "smart-contract-platform",
      "name": "Smart Contract Platform",
      "marketCap": 2261471553524.96,
      "marketCapChange24hPct": 1.1784,
      "volume24h": 95000000000,
      "topCoins": [
        "bitcoin",
        "ethereum",
        "solana"
      ],
      "updatedAt": "2026-08-22T13:15:00.000Z"
    }
  ]
}

Try it - see the 402 challenge (free)

curl -i "https://agent402.tools/api/coin-categories?order=market_cap_desc&limit=10"

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/coin-categories?order=market_cap_desc&limit=10");

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