MCP Server — Setup Guide

Before you start

- You need a Siit account with access to your workspace
- The Siit MCP server endpoint is https://mcp.siit.io/mcp
- The Public API feature must be enabled for your role. You can turn this on under Settings → Role & permissions → Public API.

Claude (Desktop and Web)

Open Customize then Connectors 
And click + button 
Then "Add custom connector" 

Add a new custom connector named Siit.

Set the URL to https://mcp.siit.io/mcp

Leave OAuth Client ID and OAuth Client Secret blank.

Save and authorize.

Claude Code

Run the following in your terminal:

claude mcp add --transport http siit https://mcp.siit.io/mcp

Then open a Claude Code session and run /mcp to complete the authentication flow.

Codex — Via CLI

Run:
codex mcp add siit --url https://mcp.siit.io/mcp

You'll be prompted to log in with your Siit account automatically.

Note: If this is your first time using an MCP in Codex, you need to enable the rmcp feature first. Add the following to ~/.codex/config.toml:

[features]
experimental_use_rmcp_client = true

Codex — Via config file 

1. Open ~/.codex/config.toml. in your preferred editor
2. Add the following:

toml 

[features]
experimental_use_rmcp_client = true

[mcp_servers.siit]
url = "https://mcp.siit.io/mcp"

3. Run codex mcp login siit to complete authentication.

Cursor

Visual Studio Code

1. Press Ctrl/Cmd + P and search for MCP: Add Server.

2. Select Command (stdio).

3. Enter the following command and press Enter:

   npx mcp-remote https://mcp.siit.io/mcp

4. Name the server Siit and press Enter.

5. Go to MCP: List Servers, select Siit, then select Start Server

Windsurf

1. Press Ctrl/Cmd + , to open Windsurf settings.

2. Scroll to Cascade → MCP servers.

3. Select Add Server → Add custom server.

4. Paste the following configuration:

   {

     "mcpServers": {

       "siit": {

         "command": "npx",

         "args": ["-y", "mcp-remote", "https://mcp.siit.io/mcp"]

       }

     }

   }

Zed

1. Press Cmd + , to open Zed settings.

2. Add the following:

{
  "context_servers": {
    "siit": {
      "source": "custom",
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://mcp.siit.io/mcp"],
      "env": {}
    }
  }
}

Other MCP-compatible tool

For any other client that supports MCP:
- Command: npx
- Arguments: y mcp-remote https://mcp.siit.io/mcp
- Environment: None

Troubleshooting

I see an "internal server error" when connecting

Clear saved auth data and try again:
rm -rf ~/.mcp-auth
You may also need to update Node.js to a more recent version.

Does the MCP support Streamable HTTP?

Yes — at https://mcp.siit.io/mcp

Which version of Node.js do I need?

We recommend the latest LTS version. If you run into issues, updating Node is the first thing to try.