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mcp/harbor
LangChain

Polystate for LangChain

io.polystate/mcp

Relocation, residency, visa, company-formation and crypto-tax data for about 170 countries.

client:LangChain transport:streamable-http

Install Polystate in LangChain

pip install langchain-mcp-adapters 

from langchain_mcp_adapters.client import MultiServerMCPClient

client = MultiServerMCPClient({
        "mcp": {
            "transport": "streamable_http",
            "url": "https://polystate-mcp-server.shy-surf-2fdf.workers.dev/mcp",
        }
})

tools = await client.get_tools()

get_tools() returns the server's tools as LangChain tools, ready for an agent. LangChain docs

Polystate in other clients

Polystate MCP server