mcp-confluent

An MCP server implementation that enables AI assistants to interact with Confluent Cloud REST APIs. This server allows AI tools like Claude Desktop and Goose CLI to manage Kafka topics, connectors, and Flink SQL statements through natural language interactions.

Demo

Goose CLI

!Goose CLI Demo

Claude Desktop

!Claude Desktop Demo

Table of Contents

• mcp-confluent
  • Demo
    • Goose CLI
    • Claude Desktop
  • Table of Contents
  • User Guide
    • Getting Started
    • Configuration
    • Environment Variables Reference
    • Usage
    • Configuring Claude Desktop
    • Configuring Goose CLI
    • mcp-confluent CLI Usage
      • Basic Usage
      • Example: Deploy using all transports
      • Example: Allow Only Specific Tools
      • Example: Block Certain Tools
      • Example: Use Tool Lists from Files
      • Example: List All Available Tools
  • Developer Guide
    • Project Structure
    • Building and Running
    • Testing
      • MCP Inspector
    • Adding a New Tool
    • Generating Types
    • Contributing

User Guide

Getting Started

1. Create a .env file: Copy the example .env file structure (shown below) into a new file named .env in the root of your project.

2. Populate the .env file: Fill in the necessary values for your Confluent Cloud environment. See the Configuration section for details on each variable.

3. Install Node.js (if not already installed)

   • We recommend using NVM (Node Version Manager) to manage Node.js versions
   • Install and use Node.js:

   nvm install 22
   nvm use 22
   

Configuration

Create a .env file in the root directory of your project with the following configuration:

# .env file
BOOTSTRAP_SERVERS="pkc-v12gj.us-east4.gcp.confluent.cloud:9092"
KAFKA_API_KEY="..."
KAFKA_API_SECRET="..."
KAFKA_REST_ENDPOINT="https://pkc-v12gj.us-east4.gcp.confluent.cloud:443"
KAFKA_CLUSTER_ID=""
KAFKA_ENV_ID="env-..."
FLINK_ENV_ID="env-..."
FLINK_ORG_ID=""
FLINK_REST_ENDPOINT="https://flink.us-east4.gcp.confluent.cloud"
FLINK_ENV_NAME=""
FLINK_DATABASE_NAME=""
FLINK_API_KEY=""
FLINK_API_SECRET=""
FLINK_COMPUTE_POOL_ID="lfcp-..."
CONFLUENT_CLOUD_API_KEY=""
CONFLUENT_CLOUD_API_SECRET=""
CONFLUENT_CLOUD_REST_ENDPOINT="https://api.confluent.cloud"
SCHEMA_REGISTRY_API_KEY="..."
SCHEMA_REGISTRY_API_SECRET="..."
SCHEMA_REGISTRY_ENDPOINT="https://psrc-zv01y.northamerica-northeast2.gcp.confluent.cloud"

Environment Variables Reference

Variable	Description	Default Value	Required
HTTP_HOST	Host to bind for HTTP transport (string)	"localhost"	Yes
HTTP_PORT	Port to use for HTTP transport (number (min: 0))	3000	Yes
BOOTSTRAP_SERVERS	List of Kafka broker addresses in the format host1:port1,host2:port2 used to establish initial connection to the Kafka cluster (string)		No
CONFLUENT_CLOUD_API_KEY	Master API key for Confluent Cloud platform administration, enabling management of resources across your organization (string (min: 1))		No
CONFLUENT_CLOUD_API_SECRET	Master API secret paired with CONFLUENT_CLOUD_API_KEY for comprehensive Confluent Cloud platform administration (string (min: 1))		No
CONFLUENT_CLOUD_REST_ENDPOINT	Base URL for Confluent Cloud's REST API services (default)		No
FLINK_API_KEY	Authentication key for accessing Confluent Cloud's Flink services, including compute pools and SQL statement management (string (min: 1))		No
FLINK_API_SECRET	Secret token paired with FLINK_API_KEY for authenticated access to Confluent Cloud's Flink services (string (min: 1))		No
FLINK_COMPUTE_POOL_ID	Unique identifier for the Flink compute pool, must start with 'lfcp-' prefix (string)		No
FLINK_DATABASE_NAME	Name of the associated Kafka cluster used as a database reference in Flink SQL operations (string (min: 1))		No
FLINK_ENV_ID	Unique identifier for the Flink environment, must start with 'env-' prefix (string)		No
FLINK_ENV_NAME	Human-readable name for the Flink environment used for identification and display purposes (string (min: 1))		No
FLINK_ORG_ID	Organization identifier within Confluent Cloud for Flink resource management (string (min: 1))		No
FLINK_REST_ENDPOINT	Base URL for Confluent Cloud's Flink REST API endpoints used for SQL statement and compute pool management (string)		No
KAFKA_API_KEY	Authentication credential (username) required to establish secure connection with the Kafka cluster (string (min: 1))		No
KAFKA_API_SECRET	Authentication credential (password) paired with KAFKA_API_KEY for secure Kafka cluster access (string (min: 1))		No
KAFKA_CLUSTER_ID	Unique identifier for the Kafka cluster within Confluent Cloud ecosystem (string (min: 1))		No
KAFKA_ENV_ID	Environment identifier for Kafka cluster, must start with 'env-' prefix (string)		No
KAFKA_REST_ENDPOINT	REST API endpoint for Kafka cluster management and administration (string)		No
SCHEMA_REGISTRY_API_KEY	Authentication key for accessing Schema Registry services to manage and validate data schemas (string (min: 1))		No
SCHEMA_REGISTRY_API_SECRET	Authentication secret paired with SCHEMA_REGISTRY_API_KEY for secure Schema Registry access (string (min: 1))		No
SCHEMA_REGISTRY_ENDPOINT	URL endpoint for accessing Schema Registry services to manage data schemas (string)		No

Usage

This MCP server is designed to be used with various MCP clients, such as Claude Desktop or Goose CLI/Desktop. The specific configuration and interaction will depend on the client you are using. However, the general steps are:

1. Start the Server: You can run the MCP server in one of two ways:

   • From source: Follow the instructions in the Developer Guide to build and run the server from source. This typically involves:

     • Installing dependencies (npm install)
     • Building the project (npm run build or npm run dev)

   • With npx: You can start the server directly using npx (no build required):

     npx -y @confluentinc/mcp-confluent -e /path/to/confluent-mcp-server/.env
     

2. Configure your MCP Client: Each client will have its own way of specifying the MCP server's address and any required credentials. You'll need to configure your client (e.g., Claude, Goose) to connect to the address where this server is running (likely localhost with a specific port). The port the server runs on may be configured by an environment variable.

3. Start the MCP Client: Once your client is configured to connect to the MCP server, you can start your mcp client and on startup - it will stand up an instance of this MCP server locally. This instance will be responsible for managing data schemas and interacting with Confluent Cloud on your behalf.

4. Interact with Confluent through the Client: Once the client is connected, you can use the client's interface to interact with Confluent Cloud resources. The client will send requests to this MCP server, which will then interact with Confluent Cloud on your behalf.

Configuring Claude Desktop

See here for more details about installing Claude Desktop and MCP servers.

To configure Claude Desktop to use this MCP server:

1. Open Claude Desktop Configuration

   • On Mac: ~/Library/Application Support/Claude/claude_desktop_config.json
   • On Windows: %APPDATA%\Claude\claude_desktop_config.json

2. Edit Configuration File

   • Open the config file in your preferred text editor
   • Add or modify the configuration using one of the following methods:

   {
     "mcpServers": {
       "confluent": {
         "command": "node",
         "args": [
           "/path/to/confluent-mcp-server/dist/index.js",
            "--env-file",
           "/path/to/confluent-mcp-server/.env",
         ]
       }
     }
   }
   

   {
     "mcpServers": {
       "confluent": {
         "command": "npx",
         "args": [
           "-y"
           "@confluentinc/mcp-confluent",
           "-e",
           "/path/to/confluent-mcp-server/.env"
         ]
       }
     }
   }
   

   Replace /path/to/confluent-mcp-server/ with the actual path where you've installed this MCP server.

3. Restart Claude Desktop

   • Close and reopen Claude Desktop for the changes to take effect
   • The MCP server will automatically start when Claude Desktop launches

Now Claude Desktop will be configured to use your local MCP server for Confluent interactions.

!Claude Tools

Configuring Goose CLI

See here for detailed instructions on how to install the Goose CLI.

Once installed, follow these steps:

1. Run the Configuration Command:

   goose configure
   

2. Follow the Interactive Prompts:

   • Select Add extension
   • Choose Command-line Extension
   • Enter mcp-confluent as the extension name
   • Choose one of the following configuration methods:

   node /path/to/confluent-mcp-server/dist/index.js --env-file /path/to/confluent-mcp-server/.env
   

   npx -y @confluentinc/mcp-confluent -e /path/to/confluent-mcp-server/.env
   

Replace /path/to/confluent-mcp-server/ with the actual path where you've installed this MCP server.

!Goose Configure

mcp-confluent CLI Usage

The MCP server provides a flexible command line interface (CLI) for advanced configuration and control. The CLI allows you to specify environment files, transports, and fine-tune which tools are enabled or blocked.

Basic Usage

You can view all CLI options and help with:

npx @confluentinc/mcp-confluent --help 

Usage: mcp-confluent [options]

Confluent MCP Server - Model Context Protocol implementation for Confluent Cloud

Options:
  -V, --version                    output the version number
  -e, --env-file <path>            Load environment variables from file
  -k, --kafka-config-file <file>   Path to a properties file for configuring kafka clients
  -t, --transport <types>          Transport types (comma-separated list) (choices: "http", "sse", "stdio", default: "stdio")
  --allow-tools <tools>            Comma-separated list of tool names to allow. If provided, takes precedence over --allow-tools-file. Allow-list is applied before block-list.
  --block-tools <tools>            Comma-separated list of tool names to block. If provided, takes precedence over --block-tools-file. Block-list is applied after allow-list.
  --allow-tools-file <file>        File with tool names to allow (one per line). Used only if --allow-tools is not provided. Allow-list is applied before block-list.
  --block-tools-file <file>        File with tool names to block (one per line). Used only if --block-tools is not provided. Block-list is applied after allow-list.
  --list-tools                     Print the final set of enabled tool names (with descriptions) after allow/block filtering and exit. Does not start the server.
  --disable-confluent-cloud-tools  Disable all tools that require Confluent Cloud REST APIs (cloud-only tools).
  -h, --help                       display help for command

Example: Deploy using all transports

npx @confluentinc/mcp-confluent -e .env --transport http,sse,stdio

...
{"level":"info","time":"2025-05-14T17:03:02.883Z","pid":47959,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Starting transports: http, sse, stdio"}
{"level":"info","time":"2025-05-14T17:03:02.971Z","pid":47959,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"HTTP transport routes registered"}
{"level":"info","time":"2025-05-14T17:03:02.972Z","pid":47959,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"SSE transport routes registered"}
{"level":"info","time":"2025-05-14T17:03:02.972Z","pid":47959,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"STDIO transport connected"}
{"level":"info","time":"2025-05-14T17:03:03.012Z","pid":47959,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Server listening at http://[::1]:3000"}
{"level":"info","time":"2025-05-14T17:03:03.013Z","pid":47959,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Server listening at http://127.0.0.1:3000"}
{"level":"info","time":"2025-05-14T17:03:03.013Z","pid":47959,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"All transports started successfully"}

Example: Allow Only Specific Tools

npx @confluentinc/mcp-confluent -e .env --allow-tools produce-message,consume-messages

{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-topics disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool create-topics disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool delete-topics disabled due to allow/block list rules"}
{"level":"info","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool produce-message enabled"}
{"level":"info","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool consume-messages enabled"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-flink-statements disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool create-flink-statement disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool read-flink-statement disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool delete-flink-statements disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-connectors disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool read-connector disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool create-connector disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool delete-connector disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool search-topics-by-tag disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool search-topics-by-name disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool create-topic-tags disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool delete-tag disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool remove-tag-from-entity disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool add-tags-to-topic disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-tags disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool alter-topic-config disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-clusters disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-environments disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool read-environment disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-schemas disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:52:34.923Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool get-topic-config disabled due to allow/block list rules"}
{"level":"info","time":"2025-05-14T16:52:34.924Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Starting transports: stdio on localhost:3000"}
{"level":"info","time":"2025-05-14T16:52:34.924Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"STDIO transport connected"}
{"level":"info","time":"2025-05-14T16:52:34.924Z","pid":46818,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"All transports started successfully"}

Example: Block Certain Tools

npx @confluentinc/mcp-confluent -e .env --block-tools produce-message,consume-messages

{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-topics enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool create-topics enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool delete-topics enabled"}
{"level":"warn","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool produce-message disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool consume-messages disabled due to allow/block list rules"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-flink-statements enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool create-flink-statement enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool read-flink-statement enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool delete-flink-statements enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-connectors enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool read-connector enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool create-connector enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool delete-connector enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool search-topics-by-tag enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool search-topics-by-name enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool create-topic-tags enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool delete-tag enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool remove-tag-from-entity enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool add-tags-to-topic enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-tags enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool alter-topic-config enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-clusters enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-environments enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool read-environment enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-schemas enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool get-topic-config enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Starting transports: stdio"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"STDIO transport connected"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"All transports started successfully"}

Example: Use Tool Lists from Files

npx -y @confluentinc/mcp-confluent -e .env --allow-tools-file allow.txt --block-tools-file block.txt

{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-topics enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool create-topics enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool delete-topics enabled"}
{"level":"warn","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool produce-message disabled due to allow/block list rules"}
{"level":"warn","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool consume-messages disabled due to allow/block list rules"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-flink-statements enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool create-flink-statement enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool read-flink-statement enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool delete-flink-statements enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-connectors enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool read-connector enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool create-connector enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool delete-connector enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool search-topics-by-tag enabled"}
{"level":"info","time":"2025-05-14T16:55:45.910Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool search-topics-by-name enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool create-topic-tags enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool delete-tag enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool remove-tag-from-entity enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool add-tags-to-topic enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-tags enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool alter-topic-config enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-clusters enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-environments enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool read-environment enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool list-schemas enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Tool get-topic-config enabled"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"Starting transports: stdio"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"STDIO transport connected"}
{"level":"info","time":"2025-05-14T16:55:45.911Z","pid":47344,"hostname":"G9PW1FJH64","name":"mcp-confluent","msg":"All transports started successfully"}

Example: List All Available Tools

npx -y @confluentinc/mcp-confluent --list-tools

add-tags-to-topic: Assign existing tags to Kafka topics in Confluent Cloud.
alter-topic-config: Alter topic configuration in Confluent Cloud.
consume-messages: Consumes messages from one or more Kafka topics. Supports automatic deserialization of Schema Registry encoded messag...
create-connector: Create a new connector. Returns the new connector information if successful.
create-flink-statement: Make a request to create a statement.
create-topic-tags: Create new tag definitions in Confluent Cloud.
create-topics: Create one or more Kafka topics.
delete-connector: Delete an existing connector. Returns success message if deletion was successful.
delete-flink-statements: Make a request to delete a statement.
delete-tag: Delete a tag definition from Confluent Cloud.
delete-topics: Delete the topic with the given names.
get-topic-config: Retrieve configuration details for a specific Kafka topic.
list-clusters: Get all clusters in the Confluent Cloud environment
list-connectors: Retrieve a list of "names" of the active connectors. You can then make a read request for a specific connector by name.
list-environments: Get all environments in Confluent Cloud with pagination support
list-flink-statements: Retrieve a sorted, filtered, paginated list of all statements.
list-schemas: List all schemas in the Schema Registry.
list-tags: Retrieve all tags with definitions from Confluent Cloud Schema Registry.
list-topics: List all topics in the Kafka cluster.
produce-message: Produce records to a Kafka topic. Supports Confluent Schema Registry serialization (AVRO, JSON, PROTOBUF) for both ke...
read-connector: Get information about the connector.
read-environment: Get details of a specific environment by ID
read-flink-statement: Make a request to read a statement and its results
remove-tag-from-entity: Remove tag from an entity in Confluent Cloud.
search-topics-by-name: List all topics in the Kafka cluster matching the specified name.
search-topics-by-tag: List all topics in the Kafka cluster with the specified tag.

Tip: The allow-list is applied before the block-list. If neither is provided, all tools are enabled by default.

Developer Guide

Project Structure

/
├── src/                 # Source code
│   ├── confluent/       # Confluent integration (API clients, etc.)
│   │   └── tools/           # Tool implementations
│   ├── mcp/             # MCP protocol and transport logic
│   │   └── transports/
│   └── ...              # Other server logic, utilities, etc.
├── dist/                # Compiled output
├── openapi.json         # OpenAPI specification for Confluent Cloud
├── .env                 # Environment variables (example - should be copied and filled)
├── README.md            # This file
└── package.json         # Node.js project metadata and dependencies

Building and Running

1. Install Dependencies:

   npm install
   

2. Development Mode (watch for changes):

   npm run dev
   

   This command compiles the TypeScript code to JavaScript and automatically rebuilds when changes are detected in the src/ directory.

3. Production Build (one-time compilation):

   npm run build
   

4. Start the Server:

   npm run start
   

Testing

MCP Inspector

For testing MCP servers, you can use MCP Inspector which is an interactive developer tool for testing and debugging MCP servers.

# make sure you've already built the project either in dev mode or by running npm run build
npx @modelcontextprotocol/inspector node  $PATH_TO_PROJECT/dist/index.js --env-file $PATH_TO_PROJECT/.env

Adding a New Tool

1. Add a new enum to the enum class ToolName.
2. Add your new tool to the handlers map in the ToolFactory class.
3. Create a new file, exporting the class that extends BaseToolHandler.
   1. Implement the handle method of the base class.
   2. Implement the getToolConfig method of the base class.
4. Once satisfied, add it to the set of enabledTools in index.ts.

Generating Types

# as of v7.5.2 there is a bug when using allOf w/ required https://github.com/openapi-ts/openapi-typescript/issues/1474. need --empty-objects-unknown flag to avoid it
npx openapi-typescript ./openapi.json -o ./src/confluent/openapi-schema.d.ts --empty-objects-unknown

Contributing

Bug reports and feedback is appreciated in the form of Github Issues. For guidelines on contributing please see CONTRIBUTING.md