Apache Pinot + MooPoint: Complete MCP Integration

Apache Pinot is a MCP server that MCP server for Apache Pinot real-time analytics database with SQL query capabilities and metadata access.

When integrated with MooPoint, you can:

• List and inspect Apache Pinot tables
• View and analyze table segments
• Retrieve and analyze table schemas

This guide provides step-by-step instructions to set up Apache Pinot in MooPoint, including configuration, examples, and troubleshooting.

What You'll Achieve

After completing this setup:

• Apache Pinot will be fully integrated and operational
• You can use Apache Pinot tools directly in MooPoint
• All Apache Pinot capabilities will be available for your workflows
• Access to 5 different tools

Prerequisites

Before starting, ensure you have:

• Apache Pinot broker hostname
• Apache Pinot broker port
• MooPoint installed and configured
• Compatible operating system (Web Platform, Mobile Web)

Installation

Step 1: Install Apache Pinot

Configuration

Step 2: Configure MooPoint

1. Open MooPoint settings
2. Navigate to MCP server configuration
3. Add Apache Pinot server with appropriate settings
4. Save and restart if needed

Examples

Once configured, you can use Apache Pinot in MooPoint:

List All Tables

Get overview of available Pinot tables

Ask MooPoint: "Show me all the tables available in the Pinot cluster"

Expected Result: List of table names with basic metadata and schema information

Execute Analytics Query

Run SQL query for real-time analytics

Ask MooPoint: "SELECT COUNT(*) FROM events WHERE timestamp > now() - 3600000"

Expected Result: Query results showing event count for last hour

Analyze Table Structure

Get detailed schema information for a table

Ask MooPoint: "Show me the schema and structure of the user_events table"

Expected Result: Table schema with column names, types, and index information

Generate Data Visualization

Create histogram plots from query results

Ask MooPoint: "Create a histogram showing user activity distribution by hour"

Expected Result: Histogram visualization with data aggregated by time buckets

Testing Your Setup

1. Launch MooPoint
2. Verify Apache Pinot is available in the tools list
3. Test basic Apache Pinot functionality

Troubleshooting

Common Issues

uv Command Not Found

Symptoms: Command not found error, uv: command not found

Cause: uv package manager not installed

Solution:

• Install uv using: curl -LsSf https://astral.sh/uv/install.sh | sh
• Restart terminal or source shell configuration
• Verify installation with: uv --version

Pinot Connection Failed

Symptoms: Connection refused, Broker unreachable, Network timeout

Cause: Invalid Pinot broker configuration or cluster not running

Solution:

• Verify PINOT_BROKER_HOST and PINOT_BROKER_PORT in .env file
• Check Pinot cluster is running and accessible
• Test connection: telnet <broker_host> <broker_port>
• Ensure firewall allows connections to Pinot broker

Environment Variables Not Loaded

Symptoms: Config missing errors, Default values being used

Cause: .env file not found or incorrectly formatted

Solution:

• Create .env file in repository root directory
• Copy from .env.example and modify values
• Ensure no spaces around = in variable assignments
• Restart MCP server after configuration changes

Claude Desktop Not Recognizing Server

Symptoms: Server not appearing, Connection errors in Claude

Cause: Incorrect claude_desktop_config.json configuration

Solution:

• Verify path to uv binary in command field
• Ensure correct path to mcp-pinot repository
• Restart Claude Desktop after configuration changes
• Check Claude Desktop logs for error messages

MCP Server Connection Failed

Symptoms: Connection timeout, Server unreachable, Test connection fails

Cause: Invalid server URL or server not accessible

Solution:

• Verify MCP server URL is correct and publicly accessible
• Check server supports HTTP or SSE transport protocol
• Ensure server is running and responding to health checks
• Test server URL in browser or with curl
• Review server logs for connection errors

OAuth Authentication Failing

Symptoms: OAuth redirect errors, Token refresh failures, Permission denied

Cause: Invalid OAuth credentials or misconfigured redirect URLs

Solution:

• Verify OAuth client ID and secret are correct
• Check redirect URL in OAuth provider matches MooPoint configuration
• Ensure all required scopes are configured
• Complete OAuth authorization flow fully
• Check OAuth provider allows the application

Tool Calling Not Working

Symptoms: Tools not appearing, Tool execution fails, LLM cannot access tools

Cause: MCP server not providing tools correctly or model limitations

Solution:

• Verify MCP server exposes tools in correct format
• Check that selected LLM model supports function calling
• Review tool definitions for correct parameter schemas
• Test MCP server independently to ensure tools work
• Try different LLM model that supports tool calling

API Key Errors

Symptoms: Invalid API key, Authentication failed, Rate limit errors

Cause: Incorrect or expired API keys for LLM providers

Solution:

• Verify API keys are correctly entered in Settings
• Check API key has not expired or been revoked
• Ensure API key has sufficient permissions
• Verify you have not exceeded rate limits or quotas
• Regenerate API key if issues persist

Model Switching Issues

Symptoms: Model not loading, Conversation context lost, Inconsistent behavior

Cause: Model compatibility or configuration issues

Solution:

• Ensure API key for selected model is configured
• Start new conversation when switching models
• Verify model supports required features (tool calling, etc.)
• Check model availability and status
• Review model-specific limitations and requirements

Apache Pinot not appearing in MooPoint

Symptoms: Server not listed, Tools not available

Cause: Configuration or installation issue

Solution:

• Verify configuration syntax
• Check Apache Pinot installation
• Restart MooPoint
• Check logs for error messages

Next Steps

Now that Apache Pinot is integrated with MooPoint:

• Explore all Apache Pinot capabilities through MooPoint
• Check out other MCP servers that work with MooPoint
• Join the MCP community for tips and support
• Consider contributing to Apache Pinot development

Need Help?

• Search for Apache Pinot documentation
• Check the MooPoint MCP guide
• Join the MCP community discussions