CrossFin

AI agent access to Asian crypto markets.

CommunityOnlineNo sign-inGlobalFreeRead-only

What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    AI agent access to Asian crypto markets. Korean exchange routing and x402 paid APIs.

    How to connect

    How to connect CrossFin to Claude

    The server address to paste into Claude settings:

    https://crossfin.dev/api/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect CrossFin to ChatGPT

    The server address to paste into ChatGPT settings:

    https://crossfin.dev/api/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect CrossFin to Cursor

    The server address to paste into Cursor settings:

    https://crossfin.dev/api/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (16)

    Raw names from tools/list. Only developers need these.

    get_kimchi_premiumFree preview of Route Spread — real-time price spread between Korean and global crypto exchanges (top 3 pairs)
    list_exchange_feesTrading fees, withdrawal fees, and transfer times for all supported exchanges (Bithumb, Upbit, Coinone, GoPax, bitFlyer, WazirX, bitbank, Indodax, Bitkub, Binance, OKX, Bybit, KuCoin, Coinbase)
    compare_exchange_pricesCompare Bithumb KRW prices vs Binance USD prices for tracked coins with transfer-time estimates
    search_servicesSearch the CrossFin service registry (184 services) by keyword
    list_servicesList services from the CrossFin registry with optional category filter
    get_serviceGet detailed information about a specific service by ID
    list_categoriesList all service categories with counts
    get_analyticsCrossFin gateway usage analytics — total calls, top services, recent activity
    get_guideComplete CrossFin API guide — services, pricing, x402 payment flow, code examples
    find_optimal_routeFind cheapest/fastest path across 14 exchanges (incl. Coinbase, SUI, APT) using 13 bridge coins. Paid: $0.10 via x402. Requires local install with EVM_PRIVATE_KEY.
    call_paid_serviceCall any CrossFin paid API with automatic x402 USDC payment. Requires local install with EVM_PRIVATE_KEY.
    create_walletCreate a wallet in the local CrossFin ledger. Requires local install.
    get_balanceGet wallet balance (KRW). Requires local install.
    transferTransfer funds between wallets (KRW). Requires local install.
    list_transactionsList transactions. Requires local install.
    set_budgetSet daily spend limit (KRW). Requires local install.