MCP SERVER

FIXSIM

Test FIX from Claude, ChatGPT, or Cursor: free sandbox FIX sessions or your own FIXSIM instances.

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About FIXSIM

Test FIX from Claude, ChatGPT, or Cursor: free sandbox FIX sessions or your own FIXSIM instances.

How to connect

What is the endpoint and how does it run?

Hosted remote server over Streamable HTTP at https://mcp.fixsim.com/mcp.

How do I add FIXSIM to Claude Code, Cursor or Claude Desktop?

One command, any client (npm)

npx ruagentic add fixsim

Claude Code

claude mcp add --transport http fixsim https://mcp.fixsim.com/mcp

Cursor, Windsurf and other clients that accept a URL (mcp.json)

{
  "mcpServers": {
    "fixsim": {
      "url": "https://mcp.fixsim.com/mcp"
    }
  }
}

Claude Desktop (claude_desktop_config.json, via the mcp-remote bridge)

{
  "mcpServers": {
    "fixsim": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://mcp.fixsim.com/mcp"
      ]
    }
  }
}

Snippets are generated from the published endpoint; the server name fixsim is only a label you can change. Add the credentials the publisher documents.

Project website Source repository

REMOTE ENDPOINThttps://mcp.fixsim.com/mcpUse this URL in a compatible client. Follow the provider’s authentication instructions.

Questions and answers

What is FIXSIM?

FIXSIM is an MCP server in the Developer tools category. Test FIX from Claude, ChatGPT, or Cursor: free sandbox FIX sessions or your own FIXSIM instances.

How do I connect to FIXSIM?

Hosted remote server over Streamable HTTP at https://mcp.fixsim.com/mcp. The listing page has ready-made snippets for Claude Code, Cursor and Claude Desktop.

Where is FIXSIM published?

Its homepage is https://www.fixsim.com/sandbox and its source repository is https://github.com/GammaThreeTrading/fixsim-mcp. RUAGENTIC read these details from Official MCP Registry on October 5, 2026 and did not install or run the project.

Sources and checks

View the source

Source information collected October 5, 2026.

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