Supabase MCP Server

Supabase MCP Server

A Model Context Protocol (MCP) server that allows Claude and other LLMs to interact with Supabase to perform CRUD operations on Postgres tables.

Features

• Database operations:
  • Query data with filters
  • Insert data
  • Update data
  • Delete data
  • List tables

Prerequisites

• Node.js (v16 or newer)
• npm or yarn
• Supabase project with API keys

Installation

Option 1: Install from npm (recommended)

The package is published on npm! You can install it globally with:

Or locally in your project:

Option 2: Clone the repository

Configuration

Create a .env file with your Supabase credentials:

Usage with Claude

Claude requires a specific transport mode for compatibility. This package provides a dedicated binary for Claude integration:

In Claude Desktop MCP Config

Make sure you set the required environment variables in the configuration. Claude will use the stdio transport for communication.

Manual Testing with Claude Binary

For testing outside of Claude, you can run:

Or if installed globally:

Usage as a Standalone Server

After installing globally:

This will start the MCP server at http://localhost:3000 (or the port specified in your .env file).

Usage in Your Code

You can also use supabase-mcp as a library in your own Node.js projects:

Troubleshooting

Common Issues and Solutions

1. "Port XXXX is already in use"

The HTTP server attempts to find an available port automatically. You can manually specify a different port in your .env file by changing the MCP_SERVER_PORT value.

2. "Missing required environment variables"

Make sure you have a proper .env file with all the required values or that you've set the environment variables in your system.

3. "TypeError: Class constructor Server cannot be invoked without 'new'"

If you see this error, you may be running an older version of the package. Update to the latest version:

4. JSON parsing errors with Claude

Make sure you're using the Claude-specific binary (supabase-mcp-claude) instead of the regular HTTP server (supabase-mcp).

5. Request timed out with Claude

This usually means Claude initiated the connection but the server was unable to respond in time. Check:

• Are your Supabase credentials correct?
• Is your server setup properly and running?
• Is there anything blocking the connection?

Tools Reference

Database Tools

1. queryDatabase
   • Parameters:
     • table (string): Name of the table to query
     • select (string, optional): Comma-separated list of columns (default: "*")
     • query (object, optional): Filter conditions
2. insertData
   • Parameters:
     • table (string): Name of the table
     • data (object or array of objects): Data to insert
3. updateData
   • Parameters:
     • table (string): Name of the table
     • data (object): Data to update as key-value pairs
     • query (object): Filter conditions for the update
4. deleteData
   • Parameters:
     • table (string): Name of the table
     • query (object): Filter conditions for deletion
5. listTables
   • Parameters: None

Version History

• 1.0.0: Initial release
• 1.0.1: Added automatic port selection
• 1.0.2: Fixed protocol compatibility issues
• 1.0.3: Added JSON-RPC support
• 1.1.0: Complete rewrite using official MCP SDK
• 1.2.0: Added separate Claude transport and fixed port conflict issues
• 1.3.0: Updated for improved compatibility with TypeScript projects
• 1.4.0: Fixed Claude stdio transport integration based on Supabase community best practices
• 1.5.0: Removed Edge Function support to improve stability and focus on database operations

License

MIT