CrossFin

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

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

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "CrossFin": {
      "url": "https://crossfin.dev/api/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (16)

• get_kimchi_premium

  Free preview of Route Spread — real-time price spread between Korean and global crypto exchanges (top 3 pairs)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_exchange_fees

  Trading fees, withdrawal fees, and transfer times for all supported exchanges (Bithumb, Upbit, Coinone, GoPax, bitFlyer, WazirX, bitbank, Indodax, Bitkub, Binance, OKX, Bybit, KuCoin, Coinbase)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• compare_exchange_prices

  Compare Bithumb KRW prices vs Binance USD prices for tracked coins with transfer-time estimates

  Parameters:

  • coin — string — Coin symbol (e.g. BTC, XRP). Omit for all.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• search_services

  Search the CrossFin service registry (184 services) by keyword

  Parameters:

  • query (required) — string — Search keyword

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_services

  List services from the CrossFin registry with optional category filter

  Parameters:

  • limit — integer
  • category — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• get_service

  Get detailed information about a specific service by ID

  Parameters:

  • serviceId (required) — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_categories

  List all service categories with counts

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• get_analytics

  CrossFin gateway usage analytics — total calls, top services, recent activity

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• get_guide

  Complete CrossFin API guide — services, pricing, x402 payment flow, code examples

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• find_optimal_route

  Find 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.

  Parameters:

  • from (required) — string — Source (e.g. bithumb:KRW)
  • to (required) — string — Destination (e.g. binance:USDC)
  • amount (required) — number
  • strategy — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• call_paid_service

  Call any CrossFin paid API with automatic x402 USDC payment. Requires local install with EVM_PRIVATE_KEY.

  Parameters:

  • url — string
  • params — object
  • serviceId — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• create_wallet

  Create a wallet in the local CrossFin ledger. Requires local install.

  Parameters:

  • label (required) — string
  • initialDepositKrw — number

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• get_balance

  Get wallet balance (KRW). Requires local install.

  Parameters:

  • walletId (required) — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• transfer

  Transfer funds between wallets (KRW). Requires local install.

  Parameters:

  • fromWalletId (required) — string
  • toWalletId (required) — string
  • amountKrw (required) — number

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_transactions

  List transactions. Requires local install.

  Parameters:

  • limit — number
  • walletId — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• set_budget

  Set daily spend limit (KRW). Requires local install.

  Parameters:

  • dailyLimitKrw (required)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

Repository

Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.