CrossFin

bubilife1202/crossfin

Connects Claude to 14 Asian crypto exchanges (Bithumb, Upbit, Coinone, bitFlyer, Indodax, Bitkub, and others) with a routing engine that calculates optimal transfer paths across bridge coins like BTC, ETH, XRP, and SOL. Exposes real-time kimchi premium tracking, cross-exchange arbitrage signals, Korean market orderbooks, and Asian premium indices for Japan, Indonesia, and Thailand. Handles Korean-language APIs and IP restrictions that normally block programmatic access. The routing engine evaluates trading fees, withdrawal costs, and slippage to find the cheapest path for moving funds between Korean won, Japanese yen, Thai baht, and USD stablecoins. Currently free during open beta, with x402 payment infrastructure ready for metered API access.

tools: 16
auth: Secret needed
transport: STDIO, HTTP
env vars: 3
last updated: Feb 25, 2026

View on GitHub

Install

From registry metadata

$ npx add-mcp https://crossfin.dev/api/mcp --name crossfin

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

$ claude mcp add --transport http crossfin https://crossfin.dev/api/mcp

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 16 tools

Verified live against the running server on Nov 6, 2026.

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

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

No parameters. Call it with no arguments.

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)

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)

No parameters. Call it with no arguments.

compare_exchange_pricesCompare Bithumb KRW prices vs Binance USD prices for tracked coins with transfer-time estimates1 params

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

Parameters* required

coinstring

Coin symbol (e.g. BTC, XRP). Omit for all.

search_servicesSearch the CrossFin service registry (184 services) by keyword1 params

Search the CrossFin service registry (184 services) by keyword

Parameters* required

query*string

Search keyword

list_servicesList services from the CrossFin registry with optional category filter2 params

List services from the CrossFin registry with optional category filter

Parameters* required

categorystring

limitinteger

get_serviceGet detailed information about a specific service by ID1 params

Get detailed information about a specific service by ID

Parameters* required

serviceId*string

list_categoriesList all service categories with counts

List all service categories with counts

No parameters. Call it with no arguments.

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

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

No parameters. Call it with no arguments.

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

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

No parameters. Call it with no arguments.

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.4 params

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* required

amount*number

from*string

Source (e.g. bithumb:KRW)

strategystring

one of cheapest · fastest · balanced

to*string

Destination (e.g. binance:USDC)

call_paid_serviceCall any CrossFin paid API with automatic x402 USDC payment. Requires local install with EVM_PRIVATE_KEY.3 params

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

Parameters* required

paramsobject

serviceIdstring

urlstring

create_walletCreate a wallet in the local CrossFin ledger. Requires local install.2 params

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

Parameters* required

initialDepositKrwnumber

label*string

get_balanceGet wallet balance (KRW). Requires local install.1 params

Get wallet balance (KRW). Requires local install.

Parameters* required

walletId*string

transferTransfer funds between wallets (KRW). Requires local install.3 params

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

Parameters* required

amountKrw*number

fromWalletId*string

toWalletId*string

list_transactionsList transactions. Requires local install.2 params

List transactions. Requires local install.

Parameters* required

limitnumber

walletIdstring

set_budgetSet daily spend limit (KRW). Requires local install.1 params

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

Parameters* required

dailyLimitKrw*value

Configuration

EVM_PRIVATE_KEYsecret

Base wallet private key for x402 USDC payments (only needed for paid tools)

CROSSFIN_API_URL

API base URL (default: https://crossfin.dev)

CROSSFIN_LEDGER_PATH

Local ledger file path (default: ~/.crossfin/ledger.json)

Readme

CrossFin

The only way AI agents access Asian crypto markets.

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.

Live: crossfin.dev | Demo: live.crossfin.dev

Install in 30 seconds

Add this to your MCP client config:

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

Restart your MCP client. Done. 16 tools available immediately.

All API endpoints are currently free during open beta. No API key required. EVM wallet is optional (needed for x402 payment flow testing).

What can it do?

Ask your agent:

View the full README on GitHub

Details

Repository: github.com/bubilife1202/crossfin
Categories: AI & LLM Tools, Finance & Commerce
Package: crossfin-mcp
Transport: STDIO, HTTP
Auth: Required
Registry: MCP registry, active
Tools verified: Nov 6, 2026

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