AI agent access to Asian crypto markets. Korean exchange routing and x402 paid APIs.
AI agent access to Asian crypto markets. Korean exchange routing and x402 paid APIs.
CrossFin is a financial router for AI agents. It finds the cheapest path to move money across 14 exchanges (Bithumb, Upbit, Coinone, GoPax, bitFlyer, WazirX, bitbank, Indodax, Bitkub, Binance, OKX, Bybit, KuCoin, Coinbase), pays for APIs with crypto (x402 protocol), and gives agents real-time access to market data that's normally locked behind Korean-language interfaces and IP restrictions.
Once CrossFin is connected, these are the calls the assistant has available:
find_optimal_route — Optimal crypto transfer path across 14 exchanges (free)list_exchange_fees — Trading + withdrawal fee comparisoncompare_exchange_prices — Live Bithumb KRW vs Binance USD comparisonget_kimchi_premium — Korean vs. global route spread (free preview)search_services — Search registered servicesget_guide — Full agent guide (services, payment flow, examples)call_paid_service — Call any paid API with automatic x402 paymentcreate_wallet — Local ledger walletget_balance — Check wallet balancetransfer — Transfer between walletslist_transactions — Transaction historyset_budget — Daily spend limitYou will need one environment variable: EVM_PRIVATE_KEY. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
Setup follows the usual MCP pattern — install or clone the server, register it in your client's configuration file, restart the client. The configuration blocks on this page cover the common clients.
Plenty of payments and commerce servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. CrossFin's toolset — find_optimal_route, list_exchange_fees, compare_exchange_prices and 11 more — is a fair guide to whether it matches your workflow. It is maintained by bubilife1202; worth a glance at recent repository activity before you build anything load-bearing on it.
find_optimal_route — Optimal crypto transfer path across 14 exchanges (free)list_exchange_fees — Trading + withdrawal fee comparisoncompare_exchange_prices — Live Bithumb KRW vs Binance USD comparisonget_kimchi_premium — Korean vs. global route spread (free preview)search_services — Search registered servicesget_guide — Full agent guide (services, payment flow, examples)call_paid_service — Call any paid API with automatic x402 paymentcreate_wallet — Local ledger walletget_balance — Check wallet balancetransfer — Transfer between walletslist_transactions — Transaction historyset_budget — Daily spend limitlist_services — Browse service catalogget_service — Service detailsCompare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.
Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| Tool | What it does |
|---|---|
| find_optimal_route | Optimal crypto transfer path across 14 exchanges (free) |
| list_exchange_fees | Trading + withdrawal fee comparison |
| compare_exchange_prices | Live Bithumb KRW vs Binance USD comparison |
| get_kimchi_premium | Korean vs. global route spread (free preview) |
| search_services | Search registered services |
| get_guide | Full agent guide (services, payment flow, examples) |
| call_paid_service | Call any paid API with automatic x402 payment |
| create_wallet | Local ledger wallet |
| get_balance | Check wallet balance |
| transfer | Transfer between wallets |
| list_transactions | Transaction history |
| set_budget | Daily spend limit |
| list_services | Browse service catalog |
| get_service | Service details |
{
"mcpServers": {
"crossfin": {
"command": "npx",
"args": ["-y", "crossfin-mcp"],
"env": {
"EVM_PRIVATE_KEY": "0x..."
}
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| EVM_PRIVATE_KEY | Credential the server authenticates with. | Yes |
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