GitLab MCP Server Launch Failure Bug Report

[vialcollet]

Describe the bug

The GitLab MCP server fails to start with a JSON parsing error. The error occurs when attempting to launch the GitLab MCP server using Docker.

To Reproduce

Steps to reproduce the behavior:

1. Configure mcp.json with GitLab server settings
2. Attempt to start the GitLab MCP server
3. Server fails with "Unexpected end of JSON input" error

Configuration

{
  "mcpServers": {
    "gitlab": {
      "command": "cmd /k docker",
      "args": [
        "run",
        "--rm",
        "-i",
        "-e",
        "GITLAB_PERSONAL_ACCESS_TOKEN",
        "-e",
        "GITLAB_API_URL",
        "mcp/gitlab"
      ],
      "env": {
        "GITLAB_PERSONAL_ACCESS_TOKEN": "xxxxx",
        "GITLAB_API_URL": "https:/git.mydomain.fr/api/v4"
      }
    }
  }
}

Expected behavior

The GitLab MCP server should start successfully and establish a connection with the specified GitLab instance.

Logs

2025-03-05 11:26:30.369 [info] tlab: Starting new stdio process with command: cmd /k docker run --rm -i -e GITLAB_PERSONAL_ACCESS_TOKEN -e GITLAB_API_URL mcp/gitlab
2025-03-05 11:26:31.807 [error] tlab: Client error for command Unexpected end of JSON input
2025-03-05 11:26:31.807 [error] tlab: Error in MCP: Unexpected end of JSON input

Additional context

• I am running cursor on windows 11
• Same issue with npx