OpenFile with LangChain

Connect LangChain to the OpenFile MCP server and it can check names, price filings and prepare them. It needs no key or account.

Connect

from langchain_mcp_adapters.client import MultiServerMCPClient

client = MultiServerMCPClient({
    "openfile": {"transport": "streamable_http", "url": "https://mcp.joinopenfile.com"}
})
tools = await client.get_tools()

Try it

Your agent can then handle requests like:

• "Form a Wyoming LLC for my candle business."
• "Is QUILLBROOK likely to be refused as a trademark for candles?"
• "What would it cost to file a trademark in two classes?"
• "Where is my order?"

Have your agent call plan_task first, so it asks the person what it needs instead of guessing.

What you still do yourself

Your agent prepares the draft and sends the owner a link. They open it, check every answer and sign. An agent can't sign for them, and it never handles a Social Security number. Why the owner signs.

Check it worked

List the tools it loaded. You should see plan_task, create_formation and search_docs.