CrossFin MCP Server

Give your AI agent access to Asian crypto markets. 16 tools for real-time Korean exchange data, cross-exchange routing, and x402 paid API execution.

Install

npx -y crossfin-mcp

Claude Desktop config

{
  "mcpServers": {
    "crossfin": {
      "command": "npx",
      "args": ["-y", "crossfin-mcp"],
      "env": {
        "EVM_PRIVATE_KEY": "0x..."
      }
    }
  }
}

No EVM key? Free tools work without one. Paid tools ($0.01–$0.10 per call) require a Base wallet with USDC.

What your agent can do

• "빗썸에서 바이낸스로 500만원 USDC 만들려면?" → find_optimal_route evaluates 11 bridge coins, returns cheapest path
• "한국-글로벌 스프레드 얼마야?" → get_kimchi_premium returns real-time spread across 11 pairs
• "거래소별 XRP 가격 비교해줘" → compare_exchange_prices checks 4 Korean exchanges
• "한국 시장 브리핑해줘" → call_paid_service calls Morning Brief bundle

Tools

| Tool | Free/Paid | Description | |------|-----------|-------------| | find_optimal_route | $0.10 | Optimal crypto transfer path across 9 exchanges (11 bridge coins) | | list_exchange_fees | Free | Trading + withdrawal fee comparison | | compare_exchange_prices | Free | Live price comparison across Korean exchanges | | get_kimchi_premium | Free | Korean vs. global price spread preview | | call_paid_service | Varies | Call any of 35 paid APIs with automatic x402 payment | | search_services | Free | Search registered services | | list_services | Free | Browse service catalog | | get_service | Free | Service details | | list_categories | Free | Service categories | | get_guide | Free | Full agent guide | | get_analytics | Free | Gateway usage stats | | create_wallet | Free | Local ledger wallet | | get_balance | Free | Check wallet balance | | transfer | Free | Transfer between wallets | | list_transactions | Free | Transaction history | | set_budget | Free | Daily spend limit |

Supported exchanges

Bithumb, Upbit, Coinone, GoPax (Korea) + bitFlyer, WazirX (Regional Fiat) + Binance, OKX, Bybit (Global)

Bridge coins

BTC, ETH, XRP, SOL, DOGE, ADA, DOT, LINK, AVAX, TRX, KAIA

Environment variables

| Variable | Required | Description | |----------|----------|-------------| | EVM_PRIVATE_KEY | For paid tools | Base wallet private key for x402 USDC payments | | CROSSFIN_API_URL | No | API base URL (default: https://crossfin.dev) | | CROSSFIN_LEDGER_PATH | No | Local ledger path (default: ~/.crossfin/ledger.json) |

Links

• crossfin.dev — Dashboard
• live.crossfin.dev — Live routing demo
• GitHub — Source code
• npm — Package