Coin profile

Full profile of one coin by id: name/symbol, description, categories, contract addresses per platform, links (homepage, explorers, repos, social), hashing algorithm, genesis date, and a market snapshot in your currency: price, rank, market cap, fully diluted valuation, 24h volume, ATH/ATL with dates and distance, circulating/total/max supply, 24h/7d/30d/1y change. Send GET /api/coin-profile with the required field coin and pay $0.008 per call over x402 or MPP (there is no free tier). It returns a JSON object with source, fetchedAt, cached, id, symbol and 12 more.

One call for the metadata a token-risk or research agent otherwise assembles from five. Cached in-process for 5 minutes.

Category: Crypto & onchain data · Tags: crypto coin profile metadata market-data supply ath links

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Parameters

Example request

curl -i "https://agent402.tools/api/coin-profile?coin=ethereum&currency=usd"

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

Example response

{
  "source": "coingecko",
  "fetchedAt": "2026-08-22T13:20:00.000Z",
  "cached": false,
  "id": "ethereum",
  "symbol": "ETH",
  "name": "Ethereum",
  "rank": 2,
  "currency": "usd",
  "description": "Ethereum is a global, open-source platform for decentralized applications...",
  "categories": [
    "Smart Contract Platform",
    "Layer 1 (L1)"
  ],
  "platforms": [
    {
      "platform": "ethereum",
      "contract": null,
      "decimals": null
    }
  ],
  "links": {
    "homepage": "https://www.ethereum.org/",
    "explorers": [
      "https://etherscan.io/"
    ],
    "repos": [
      "https://github.com/ethereum/go-ethereum"
    ],
    "twitter": "ethereum",
    "reddit": "https://www.reddit.com/r/ethereum",
    "whitepaper": null
  },
  "hashingAlgorithm": "Ethash",
  "genesisDate": "2015-07-30",
  "market": {
    "price": 2424.5,
    "marketCap": 292876442962,
    "fullyDilutedValuation": 292876442962,
    "volume24h": 14200000000,
    "high24h": 2480.1,
    "low24h": 2390.2,
    "change24hPct": 1.2,
    "change7dPct": -3.1,
    "change30dPct": 8.4,
    "change1yPct": -12.9,
    "ath": 4878.26,
    "athDate": "2021-11-10T14:24:19.604Z",
    "athChangePct": -50.3,
    "atl": 0.432979,
    "atlDate": "2015-10-20T00:00:00.000Z",
    "circulatingSupply": 120700000,
    "totalSupply": 120700000,
    "maxSupply": null,
    "lastUpdated": "2026-08-22T13:19:00.000Z"
  },
  "sentimentUpPct": 71.4,
  "watchlistUsers": 2200000
}

From an MCP client

catalog.call {
  "slug": "coin-profile",
  "params": {
    "coin": "ethereum",
    "currency": "usd"
  }
}

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

Errors and behavior

• coin 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 (Authorization: Bearer a402_...) also pays it.
• A POST with a JSON body to /api/coin-profile 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/coin-profile?coin=ethereum&currency=usd");

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