Crypto market pulse

One-call market snapshot across every perpetual listed on Hyperliquid: breadth (advancers, decliners, unchanged, mean/median and volume-weighted 24h change), total open interest and 24h volume, top markets by volume, top gainers and losers, highest and lowest funding, and BTC/ETH at a glance. limit caps each list (max 20); minVolumeUsd (default 1,000,000) filters illiquid markets out of the lists and breadth. Send POST /api/crypto-market-pulse with no required fields (2 optional) and pay $0.004 per call over x402 or MPP (there is no free tier). It returns a JSON object with source, markets, breadth, totals, funding and 7 more.

Pure arithmetic over public data, no key, no LLM.

Category: Crypto & onchain data · Tags: crypto market breadth gainers losers funding open-interest signals

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Parameters

Example request

curl -i -X POST https://agent402.tools/api/crypto-market-pulse \
  -H "Content-Type: application/json" \
  -d '{"limit":5}'

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

Example response

{
  "source": "hyperliquid",
  "markets": {
    "listed": 230,
    "counted": 120,
    "minVolumeUsd": 1000000
  },
  "breadth": {
    "advancers": 80,
    "decliners": 35,
    "unchanged": 5,
    "advancersPct": 66.67,
    "meanChange24hPct": 1.42,
    "medianChange24hPct": 0.95,
    "volumeWeightedChange24hPct": 0.61
  },
  "totals": {
    "openInterestUsd": 9100000000,
    "volume24hUsd": 12500000000,
    "top5VolumeSharePct": 71.2
  },
  "funding": {
    "positive": 90,
    "negative": 25,
    "zero": 5,
    "meanAprPct": 8.4
  },
  "majors": {
    "BTC": {
      "markPx": 77244,
      "change24hPct": 0.36,
      "fundingAprPct": 10.95,
      "openInterestUsd": 2776803000,
      "volume24hUsd": 4679441788.67
    },
    "ETH": {
      "markPx": 2429.3,
      "change24hPct": 2.06,
      "fundingAprPct": -4.38,
      "openInterestUsd": 1832000000,
      "volume24hUsd": 3396726206.45
    }
  },
  "topByVolume": [
    {
      "coin": "BTC",
      "markPx": 77244,
      "change24hPct": 0.36,
      "volume24hUsd": 4679441788.67,
      "openInterestUsd": 2776803000,
      "fundingAprPct": 10.95
    }
  ],
  "topGainers": [
    {
      "coin": "SOL",
      "markPx": 180.2,
      "change24hPct": 8.1,
      "volume24hUsd": 900000000,
      "openInterestUsd": 500000000,
      "fundingAprPct": 20.1
    }
  ],
  "topLosers": [
    {
      "coin": "DOGE",
      "markPx": 0.21,
      "change24hPct": -4.2,
      "volume24hUsd": 300000000,
      "openInterestUsd": 200000000,
      "fundingAprPct": -3.2
    }
  ],
  "highestFunding": [
    {
      "coin": "SOL",
      "fundingHourly": 0.0000229,
      "fundingAprPct": 20.1,
      "change24hPct": 8.1,
      "openInterestUsd": 500000000
    }
  ],
  "lowestFunding": [
    {
      "coin": "ETH",
      "fundingHourly": -0.000005,
      "fundingAprPct": -4.38,
      "change24hPct": 2.06,
      "openInterestUsd": 1832000000
    }
  ],
  "fetchedAt": "2026-08-22T12:05:00.000Z"
}

From an MCP client

catalog.call {
  "slug": "crypto-market-pulse",
  "params": {
    "limit": 5
  }
}

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

Errors and behavior

• Every field is optional. An input the tool rejects returns an HTTP 4xx whose body carries error, tool, expected, required and example.
• 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 (Authorization: Bearer a402_...) also pays it.
• A GET or HEAD to /api/crypto-market-pulse returns the same 402 quote, so the price can be read without a body.
• 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/crypto-market-pulse", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "limit": 5
  }),
});

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