Crypto price

Live crypto prices for one or many coins in any vs_currency (usd, eur, btc, eth, etc). Send GET /api/crypto-price with the required field coins and pay $0.001 per call over x402 or MPP (there is no free tier). It returns a JSON object with currency, count and coins.

Returns last price, 24h change %, 24h volume, and market cap per coin. The simplest crypto price read - for ranked market-cap tables use crypto-market, for candles use crypto-history. Accepts ticker symbols (BTC, ETH, SOL) for the top ~50 by market cap, or canonical CoinGecko ids (e.g. "render-token") for any of the ~15k tracked coins. Batched: up to 25 coins per call. Backed by CoinGecko's API (this server's Demo key when configured, else the shared keyless rate).

Category: Live public data · Tags: crypto price market-data bitcoin ethereum defi cryptocurrency btc

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Parameters

Example request

curl -i "https://agent402.tools/api/crypto-price?coins=BTC%2CETH%2CSOL&currency=usd"

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

Example response

{
  "currency": "usd",
  "count": 3,
  "coins": {
    "bitcoin": {
      "price": 67234.12,
      "change24hPct": 1.42,
      "volume24h": 28100000000,
      "marketCap": 1320000000000,
      "lastUpdated": "2026-06-20T00:30:00Z"
    },
    "ethereum": {
      "price": 3520.45,
      "change24hPct": 2.18,
      "volume24h": 14200000000,
      "marketCap": 423000000000,
      "lastUpdated": "2026-06-20T00:30:00Z"
    },
    "solana": {
      "price": 148.2,
      "change24hPct": -0.65,
      "volume24h": 2400000000,
      "marketCap": 68000000000,
      "lastUpdated": "2026-06-20T00:30:00Z"
    }
  }
}

From an MCP client

catalog.call {
  "slug": "crypto-price",
  "params": {
    "coins": "BTC,ETH,SOL",
    "currency": "usd"
  }
}

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

Errors and behavior

• coins is 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/crypto-price 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/crypto-price?coins=BTC%2CETH%2CSOL&currency=usd");

Part of these workflows

Crypto price is one step in these 9 skill packs, each sold as a single call:

• 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.
• 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.
• Crypto research - Pull live price, market structure, OHLC history, trending status, global market context, and recent news for a single coin in one pass.
• Cross-asset price monitor - Side-by-side snapshot of a stock and a crypto asset: the equity's latest close against a live crypto quote, a trailing-year series for each, and a date-stamped comparison.
• Cheapest rail right now - Where should an agent transact this minute? Live gas on Ethereum + every major L2 side by side, Base gas tiers, a fee estimate for your transaction type, and ETH spot to price it all in dollars.
• 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.
• DeFi dashboard - DeFi market overview: total TVL, ETH price, Base gas, and global crypto stats in one call.
• NFT portfolio - NFT + wallet snapshot: NFT holdings, native balance, and ETH price for a given address in one call.
• Gas optimizer - Find the cheapest gas right now: Base gas, Ethereum gas, Base fee estimate, and ETH price for USD conversion.

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