How do I install MCP Sidecar?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

Is MCP Sidecar official?

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 32 (Limited). The formula is published on the methodology page.

MCPpedia

MCP Sidecar MCP Server | MCPpedia

MCP Sidecar MCP Server

Name: MCP Sidecar MCP Server
Author: lsequeiraa

Cross-platform MCP server for managing long-lived background processes from any MCP client

Tools Versions Alternatives

Registrylsequeiraa

32Limited

Install

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "lsequeiraa-mcp-sidecar": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-sidecar@0.3.2"
      ],
      "env": {
        "SIDECAR_MAX_PROCESSES": "",
        "SIDECAR_BUFFER_SIZE": "",
        "SIDECAR_KILL_TIMEOUT": "",
        "SIDECAR_CLEANUP_AFTER": "",
        "SIDECAR_MAX_OUTPUT_SIZE": "",
        "SIDECAR_ALLOWED_EXECUTABLES": "",
        "SIDECAR_BLOCKED_PATTERNS": "",
        "SIDECAR_AUDIT_LOG": ""
      }
    }
  }
}

Install guide

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Environment

Name	Required	Notes
SIDECAR_MAX_PROCESSES	No	Maximum number of concurrent managed processes (default: 10)
SIDECAR_BUFFER_SIZE	No	Output buffer size per stream in bytes (default: 1048576)
SIDECAR_KILL_TIMEOUT	No	Milliseconds to wait between graceful and forced termination (default: 5000)
SIDECAR_CLEANUP_AFTER	No	Seconds before exited processes are auto-removed. 0 disables cleanup (default: 1800)
SIDECAR_MAX_OUTPUT_SIZE	No	Global cap on bytes returned by the output tool. 0 means unlimited (default: 0)
SIDECAR_ALLOWED_EXECUTABLES	No	Comma-separated allowlist of executable names. When set, enables security mode with direct exec (no shell). Unset means security disabled.
SIDECAR_BLOCKED_PATTERNS	No	Comma-separated regex patterns to reject in commands. Only applies when security is enabled.
SIDECAR_AUDIT_LOG	No	Audit log destination. 'true' writes to cwd, 'temp' writes to OS temp dir, or a directory path. Unset disables audit logging.

MCP Sidecar MCP Server

Install

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