CoinGecko spot price

Live spot price for up to 25 coins by CoinGecko id, one row per id in the order asked: prices[] of {id, price, change24h, lastUpdated}. Send POST /api/price-coingecko with the required field ids and pay $0.001 per call over x402 or MPP (there is no free tier). It returns a JSON object with count, vsCurrency and prices.

Identify coins by their CoinGecko ID slug (bitcoin, ethereum, solana, usd-coin, ...), as an array or a comma-separated string; for ticker symbols (BTC, ETH) plus volume and market cap use crypto-price. Defaults to USD; pass vsCurrency to denominate in EUR, JPY, ETH, BTC, etc. change24h is filled only when include24hChange is true. An id CoinGecko does not know comes back with a null price and is listed in unknown.

Category: Crypto & onchain data · Tags: crypto price coingecko spot market

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Parameters

Example request

curl -i -X POST https://agent402.tools/api/price-coingecko \
  -H "Content-Type: application/json" \
  -d '{"ids":["bitcoin","ethereum"]}'

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

Example response

{
  "count": 2,
  "vsCurrency": "usd",
  "prices": [
    {
      "id": "bitcoin",
      "price": 67000.12,
      "change24h": null,
      "lastUpdated": "2026-09-24T14:50:20.000Z"
    },
    {
      "id": "ethereum",
      "price": 3500.05,
      "change24h": null,
      "lastUpdated": "2026-09-24T14:50:20.000Z"
    }
  ]
}

From an MCP client

catalog.call {
  "slug": "price-coingecko",
  "params": {
    "ids": [
      "bitcoin",
      "ethereum"
    ]
  }
}

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

Errors and behavior

• ids 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 GET or HEAD to /api/price-coingecko 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/price-coingecko", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "ids": [
      "bitcoin",
      "ethereum"
    ]
  }),
});

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