Crypto trending

Trending coins in the last 24 hours, ranked by user search activity on the market-data site (currently ~15 results). Send GET /api/crypto-trending with no input and pay $0.001 per call over x402 or MPP (there is no free tier). It returns a JSON object with count and coins.

Includes coin id, symbol, market cap rank, current price (BTC-denominated), and score. Useful signal for detecting narrative shifts before they hit price charts. Data provided by CoinGecko.

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Parameters

Crypto trending takes no parameters.

Example request

curl -i "https://agent402.tools/api/crypto-trending"

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

Example response

{
  "count": 2,
  "coins": [
    {
      "id": "render-token",
      "symbol": "RNDR",
      "name": "Render",
      "marketCapRank": 38,
      "priceBtc": 0.00012345,
      "score": 0
    },
    {
      "id": "sui",
      "symbol": "SUI",
      "name": "Sui",
      "marketCapRank": 22,
      "priceBtc": 0.00003421,
      "score": 1
    }
  ]
}

From an MCP client

catalog.call {
  "slug": "crypto-trending",
  "params": {}
}

The hosted connector at https://agent402.tools/mcp needs a payment for crypto-trending; the stdio package pays it from a wallet or from an AGENT402_CREDITS_KEY issued earlier. Local install: npx -y [email protected].

Errors and behavior

• There is no input to get wrong: any request to /api/crypto-trending runs the tool.
• 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 canceled 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/crypto-trending 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?.({ maxAmountPerPayment: "$0.001" }); // refuse any quote above this tool's price
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/crypto-trending");

Part of these workflows

Crypto trending is one step in these 4 skill packs, each sold as a single call:

• Crypto market brief - Quick crypto market snapshot: price for a specific coin, trending coins, and global market stats (total cap, BTC dominance, volume) - one call.
• 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 - a 14-tool macro + crypto basket, 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.
• Crypto dossier - Everything about a cryptocurrency in one call: live price, 90-day history, trending status, global market context, news search, and top article extraction.

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