FirmFax MCP MCP server

An official MCP server by FirmFax that exposes its proprietary dataset of 71 prop trading firms. It allows AI assistants to query firm details, rule changes, and evidence sources via JSON-RPC 2.0, ensuring every figure includes evidence status.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by FirmFax

MCP endpoint (Streamable HTTP)

https://firmfax.com/api/mcp

Vendor documentation

What you can do with it

Retrieve detailed records for specific prop trading firms
Query rule changes and data corrections over time
Find firms matching specific fee and trading criteria
Access verbatim evidence sources for firm data points

Tools advertised by the last live check:

get_firm
get_rule_changes
get_evidence
find_firms
compare_firms
list_firms

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http firmfax-mcp https://firmfax.com/api/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add firmfax-mcp --url https://firmfax.com/api/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable firmfax-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "firmfax-mcp": {
      "url": "https://firmfax.com/api/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "firmfax-mcp": {
      "type": "streamableHttp",
      "url": "https://firmfax.com/api/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start firmfax-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "firmfax-mcp": {
      "type": "http",
      "url": "https://firmfax.com/api/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http firmfax-mcp https://firmfax.com/api/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "firmfax-mcp": {
      "url": "https://firmfax.com/api/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "firmfax-mcp": {
      "serverUrl": "https://firmfax.com/api/mcp"
    }
  }
}

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