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Couchbase MCP Server

by hummusonrails
GitHub
JavaScript
MIT License
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Integrations

  • Enables natural language queries on Couchbase Capella clusters, executing SQL++ queries against Couchbase databases and returning formatted results.

Couchbase MCP Server

The Model Context Protocol (MCP) is a protocol for handling interactions between large language models (LLMs) and external systems. This repository implements a Couchbase MCP Server using the Couchbase Node.js SDK, enabling MCP clients (e.g., Claude Desktop) to perform natural language queries on Couchbase Capella clusters.

With this server you can use commands like:

  • Show me the results of SELECT * FROM my_bucket LIMIT 10
  • Execute this query: SELECT name, age FROM users WHERE active = true
  • Get me the latest 5 documents from my_bucket
  • Summarize the latest 5 orders from the orders bucket for me

Example

The following screenshot shows the MCP server in action with the Claude Desktop client. The user issues a general request in plain English and the MCP server translates it into a SQL++ query that is executed against the Couchbase Capella cluster. The results are then returned to the user in a readable format.

Setup

  1. Clone the repository and install dependencies:
git clone git@github.com:hummusonrails/couchbase-mcp-server.git cd couchbase-mcp-server npm install
  1. Create a .env file in the root directory and add your Couchbase connection string, username, and password:
COUCHBASE_CONNECTION_STRING=couchbases://your-cluster.cloud.couchbase.com COUCHBASE_USERNAME=your_username COUCHBASE_PASSWORD=your_password

Refer to the .env.sample file for the required environment variables.

  1. Build the project:
npm run build
  1. Run the server using Stdio transport:
npx couchbase-mcp-server

Note

The MCP server uses the StdioServerTransport, so it communicates over standard input/output. Ensure that your MCP client (e.g., Claude Desktop) is configured to use a local MCP server. Follow the Claude Desktop documentation to set up the MCP client to connect to the local server.

Features

Couchbase Query Tool

  • ToolName: query-couchbase
  • Description: Executes a SQL++ query statement on your Couchbase Capella cluster.
  • Usage: When invoked, the server will use the Couchbase Node.js SDK to execute the provided SQL++ query and return the results.

Developing

To work on the project locally:

  1. Install dependences:
npm install npm run build
  1. Test the server using an MCP client:

Launch your MCP client (e.g., Claude Desktop) configured to connect and invoke the tool using a sample query.

  1. Debugging

All logging messages are sent to stderr to ensure that stdout only contains MCP protocol JSON. Check your logs for detailed connection and error messages.

Contributing

Contributions are welcome! Please feel free to submit a pull request or open an issue with your suggestions. For any changes, ensure you follow the project’s code style.

License

This project is licensed under the MIT License. See the LICENSE file for details.

This server cannot be installed

-
security - not tested
A
license - permissive license
-
quality - not tested

remote-capable server

The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.

A server that enables natural language interactions with Couchbase databases through the Model Context Protocol, allowing users to perform SQL++ queries on Couchbase Capella clusters using conversational commands.

  1. Example
    1. Setup
      1. Features
        1. Couchbase Query Tool
      2. Developing
        1. Contributing
          1. License

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