CrossFin
Let coding agents query Asian crypto markets, route Korean exchange flows, and call x402-paid APIs from MCP tools.
Overview
CrossFin is a MCP server for the Build phase that exposes Asian crypto market and Korean exchange tools to agents, including optional x402 USDC-paid APIs.
What is this MCP server?
- CrossFin MCP npm package crossfin-mcp at version 1.8.8
- stdio transport for local agent wiring plus hosted API default https://crossfin.dev
- Korean exchange routing and Asian crypto market access for agents
- x402 paid tool path with EVM_PRIVATE_KEY for USDC on Base (paid tools only)
- Configurable CROSSFIN_LEDGER_PATH (default ~/.crossfin/ledger.json) for local ledger
- Registry package version 1.8.8
- npm identifier crossfin-mcp with stdio transport
- Three documented environment variables: EVM_PRIVATE_KEY, CROSSFIN_API_URL, CROSSFIN_LEDGER_PATH
What problem does it solve?
Building agent-driven crypto features for Asian venues means juggling exchange APIs, routing, and paid data gates without a unified MCP surface.
Who is it for?
Solo builders creating agents or APIs that need Korean exchange routing and Asian market data with MCP-native tooling.
Skip if: Builders outside crypto/fintech or anyone who cannot safely manage an EVM private key and exchange compliance obligations.
What do I get? / Deliverables
After install, your agent can call CrossFin tools over stdio with configurable API URL and ledger paths, and optionally pay for gated tools via x402 when EVM_PRIVATE_KEY is set.
- MCP stdio connection to CrossFin market and routing tools
- Optional x402-paid API access with local ledger at ~/.crossfin/ledger.json by default
- Agent-callable Asian crypto market operations without bespoke REST clients
Recommended MCP Servers
Journey fit
CrossFin belongs in build because you integrate market and payment rails into the product or agent you are constructing, not at idea-only research. integrations is the right shelf for an external finance API MCP with optional on-chain x402 USDC settlement and local ledger configuration.
How it compares
Finance and exchange MCP integration, not a generic portfolio dashboard skill.
Common Questions / FAQ
Who is CrossFin for?
CrossFin is for developers and indie builders wiring AI agents to Asian crypto markets, especially workflows that touch Korean exchange routing.
When should I use CrossFin?
Use CrossFin during build when your agent needs live market tools, CrossFin’s hosted API, or x402-paid endpoints instead of custom exchange glue code.
How do I add CrossFin to my agent?
Install the crossfin-mcp npm package (v1.8.8), configure stdio in your MCP client, set CROSSFIN_API_URL if needed, add EVM_PRIVATE_KEY only for paid x402 tools, and point CROSSFIN_LEDGER_PATH for ledger storage.