Content
# crypto-data-x402-mcp
MCP server giving your agent **live crypto prices and DeFi yields**, paid
**per-call in USDC via [x402](https://www.x402.org)** — 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](https://x402-crypto-data.vercel.app) (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)
```json
{
"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
