Kronos Crypto Data MCP Server

Real-time crypto market data for AI agents — derivatives (funding / OI / basis), liquidations, options IV, GEX, CEX premium, multi-source price, realized volatility, market-regime detection, and TradFi macro across 16 assets. An optional ML price forecast is available as a premium add-on.

x402-native: no API key, no signup. An autonomous agent discovers this server and pays per call in USDC on Base via the x402 micropayment protocol. There is no dashboard, no account, no API-key provisioning — just point a funded wallet at it and call. That is the one thing incumbent crypto-data MCPs (CoinGecko / CoinMarketCap / CoinGlass) cannot do.

• Data-first. 19 paid data tools covering derivatives, liquidations, options, macro, and screeners.
• Pay-per-call. Prices from $0.001 per call, settled on-chain in USDC — you pay only for what you use.
• Wallet-optional boot. The free get_sample tool works with no wallet at all.

Wallet-optional boot

The server boots and responds to initialize + tools/list without any environment variables set. Free tools (like get_sample) work without a wallet. Paid tools return a clear error if BUYER_PRIVATE_KEY is missing or the wallet has insufficient USDC — they never crash the server.

Quick start

Add the server to your MCP client config. For paid tools, set BUYER_PRIVATE_KEY to a wallet funded with USDC on Base. Omit the env block entirely to run only the free get_sample tool.

{
  "mcpServers": {
    "kronos-crypto-data": {
      "command": "npx",
      "args": ["crypto-derivatives-mcp"],
      "env": {
        "BUYER_PRIVATE_KEY": "0x<your-funded-wallet-private-key>"
      }
    }
  }
}

That's it — no signup, no API key. The first paid call triggers an on-chain USDC micropayment and returns both the data and the settlement tx hash.

Tools

Data & derivatives

Forecast (premium add-on)

A predictive signal layered on top of the data — not financial advice.

Free

All asset-scoped tools (except get_options_iv and get_gex) accept asset from: btc, eth, sol, bnb, xrp, doge, ada, avax, link, dot, ltc, trx, bch, atom, near, apt.

get_options_iv and get_gex accept btc or eth only. Forecasts are available only for btc/eth/sol (full ML) and doge/xrp/bnb (beta composite).

Install

npx (recommended)

Use the config in Quick start above.

BUYER_PRIVATE_KEY is optional at boot — the server starts without it. Omit the env block entirely to use only the free get_sample tool, or add the key when you need paid data.

Local clone

git clone https://github.com/hashchecked/kronos-mcp.git
cd kronos-mcp
npm install
npm run build

Then in your MCP client config:

{
  "mcpServers": {
    "kronos-crypto-data": {
      "command": "node",
      "args": ["/absolute/path/to/kronos-mcp/dist/index.js"],
      "env": {
        "BUYER_PRIVATE_KEY": "0x<your-funded-wallet-private-key>"
      }
    }
  }
}

How payment works

When a paid tool is called, the server makes an HTTP GET to the Kronos API. The API returns HTTP 402 with the price and pay-to address. The server's x402 library builds an EIP-3009 transferWithAuthorization signed by the configured wallet and sends it in the retry request header. The x402 facilitator submits the on-chain transaction (paying gas). The settlement tx hash is returned alongside the data.

What to configure:

• BUYER_PRIVATE_KEY — hex private key for a wallet funded with USDC on Base mainnet (eip155:8453). No ETH needed; x402 uses gasless EIP-3009 transfers.
• USDC contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Use a dedicated wallet. Fund it with only as much USDC as you need.

Error messages

Environment Variables

Security

Never commit your private key to version control. The .gitignore excludes .env and .env.*. Use a dedicated wallet with a limited USDC balance. For production deployments, supply the key via a secrets manager.

The forecast tools provide a premium predictive signal, not financial advice. No accuracy or performance is guaranteed; get_forecast_ledger exposes the raw resolved-forecast history so you can judge it yourself.