crypto-data-x402-mcp

June 12, 2026 · View on GitHub

MCP server giving your agent live crypto prices and DeFi yields, paid per-call in USDC via x402 — no account, no API-key signup, no subscription. $0.002/call on Base (Solana also accepted by the API).

Backed by the Crypto Data Agent (x402 Bazaar-listed). Data: DefiLlama, cached, agent-shaped JSON.

Tools

Tool	Cost	What
`get_crypto_prices`	$0.002	USD prices for up to 25 coins (`coingecko:ethereum`, `base:0x…`)
`get_defi_yields`	$0.002	Top DeFi pools by APY/TVL — filter by chain, TVL, stablecoin
`get_sample_prices`	free	Live demo (ETH/BTC) of the paid response shape

Setup (Claude Code / Claude Desktop / Cursor)

{
  "mcpServers": {
    "crypto-data": {
      "command": "npx",
      "args": ["-y", "crypto-data-x402-mcp"],
      "env": { "EVM_PRIVATE_KEY": "0x<dedicated-wallet-key>" }
    }
  }
}

The wallet needs USDC on Base (gas is sponsored by the x402 facilitator — no ETH required). Use a dedicated wallet with a few dollars, never your main key. Without EVM_PRIVATE_KEY the free sample tool still works.

Why pay per call?

Agent-native pricing: 1,000 calls = $2, no signup, no monthly minimum, wallet = identity. The x402 payment is signed locally by this process; your key never leaves your machine.

License

MIT