x402 Crypto MCP Server

MCP server that aggregates 6 x402 crypto backends as tools for AI agents: prices, sentiment, funding rates, technical indicators, DeFi yields, gas prices, on-chain tx status, balances, ERC-20 info, ENS, and chain state — exposed as 23 stdio tools and 26 HTTP tools (including the combined market_overview / get_market_overview, the batch get_prices, raw OHLCV candle_history / get_candles, top movers top_movers / get_top_movers, token conversion convert / get_conversion, transaction status tx_status / get_tx_status + solana_tx_status / get_solana_tx_status, wallet balances wallet_balance / get_wallet_balance

• solana_balance / get_solana_balance, the Fear & Greed series fng_history / get_fng_history, and open interest open_interest / get_open_interest).

Tools (STDIO Transport)

Tools (HTTP Transport - Vercel/Smithery)

Install

npx x402-crypto-mcp

Or globally:

npm install -g x402-crypto-mcp

Use in Claude Desktop / Cursor / any MCP client

{
  "mcpServers": {
    "x402-crypto": {
      "command": "npx",
      "args": ["x402-crypto-mcp"]
    }
  }
}

For HTTP transport (Vercel/Smithery):

{
  "mcpServers": {
    "x402-crypto": {
      "url": "https://x402-mcp-server-o8wskr5pr-yunares-projects.vercel.app/api/mcp"
    }
  }
}

x402 Payments

All backend services use x402 pay-per-call on Base mainnet (USDC). The MCP server returns 402 challenges with payment details when you need to pay. Your agent must handle x402 payments to access the data.

Data Sources

• CoinGecko (prices) — free, 60s cache
• Binance (funding rates, klines) — free
• Alternative.me (Fear & Greed) — free
• DeFiLlama (yields) — free, 5min cache
• Public RPCs (gas) — free, 30s cache
• The Graph (pool metrics) — free
• EVM RPCs (new pairs) — free

GitHub

https://github.com/yunaremaia/x402-crypto-mcp