Use FinFam in ChatGPT, Claude & AI Assistants

FinFam's financial calculators are available to any AI assistant that speaks the Model Context Protocol (MCP). Your assistant can search hundreds of community-built calculators, inspect their inputs and outputs, run calculations with your numbers, and show you the formulas behind the results. It's free and no account is needed.

Connection details

The FinFam MCP server is a remote, read-only server with no authentication:

  • Endpoint: https://ff-api.finfam.app/mcp/mcp
  • Transport: Streamable HTTP
  • Auth: None (anonymous, read-only)

Claude

In Claude (web or desktop), go to Settings → Connectors → Add custom connector and paste the endpoint URL above.

ChatGPT

In ChatGPT, enable developer mode (Settings → Apps & Connectors → Advanced), then add a new connector with the endpoint URL above and no authentication. Once FinFam is listed in the ChatGPT app directory, you'll be able to add it directly from there.

Cursor, VS Code & other MCP clients

Add this to your mcp.json (or equivalent MCP client config):

{
  "mcpServers": {
    "finfam": {
      "url": "https://ff-api.finfam.app/mcp/mcp"
    }
  }
}

Available tools

  • search_views — search for financial calculators matching a question or topic.
  • get_view_signature — get the full input/output contract for a calculator: field names, types, defaults, and hints.
  • calculate_view — run a financial calculation with the input values you provide.
  • get_view_source — get the source formulas of an open-source calculator.

All tools are read-only: nothing your assistant does through FinFam can move money, change data, or affect any account.

Example prompts

  • "Should I rent or buy a $600k house if rent is $2,800/month?"
  • "What are the inputs to FinFam's mortgage affordability calculator?"
  • "Show me the formula FinFam uses for rent vs buy."

Privacy

The anonymous MCP interface stores no user accounts. Queries are logged only for abuse prevention and service improvement. See our privacy policy for details.

Questions or feedback? Reach us at support@finfam.app.

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