A2A + JetBrains AI Assistant: Complete MCP Integration

A2A is a MCP server that An MCP server that bridges the Model Context Protocol (MCP) with the Agent-to-Agent (A2A) protocol, enabling MCP-compatible AI assistants (like Claude) to seamlessly interact with A2A agents..

When integrated with JetBrains AI Assistant, you can:

• Register and manage A2A agents for communication
• Send messages to A2A agents and handle responses
• Manage asynchronous tasks and retrieve results

This guide provides step-by-step instructions to set up A2A in JetBrains AI Assistant, including configuration, examples, and troubleshooting.

What You'll Achieve

After completing this setup:

• A2A will be fully integrated and operational
• You can use A2A tools directly in JetBrains AI Assistant
• All A2A capabilities will be available for your workflows
• Access to 4 different tools

Prerequisites

Before starting, ensure you have:

• JetBrains AI Assistant installed and configured
• Compatible operating system (Windows, macOS, Linux)

Installation

Step 1: Install A2A

Configuration

Step 2: Configure JetBrains AI Assistant

1. Locate your configuration file:

   • Windows: Settings > Tools > AI Assistant > Model Context Protocol (MCP)
   • macOS: Preferences > Tools > AI Assistant > Model Context Protocol (MCP)
   • Linux: Settings > Tools > AI Assistant > Model Context Protocol (MCP)

2. Add server configuration:

{
  "mcpServers": {
    "a2a": {
      "command": "npx",
      "args": ["-y", "a2a"],
      "env": {
        "MCP_TRANSPORT": "streamable-http",
        "MCP_HOST": "0.0.0.0",
        "MCP_PORT": "8080",
        "MCP_PATH": "/api/mcp",
        "MCP_DEBUG": "true"
      }
    }
  }
}

3. Restart JetBrains AI Assistant

Completely quit and restart JetBrains AI Assistant to load the new configuration.

Examples

Once configured, you can use A2A in JetBrains AI Assistant:

Register and Communicate with Agent

Set up communication with an A2A agent

Ask JetBrains AI Assistant: "Register an agent for data analysis tasks and send it a dataset processing request"

Expected Result: Agent registered, task submitted, and task_id returned for tracking

Stream Real-Time Data

Use streaming to get real-time updates from agent

Ask JetBrains AI Assistant: "Stream live updates from the monitoring agent about system metrics"

Expected Result: Continuous stream of system metrics and status updates

Manage Multiple Agents

Coordinate tasks across multiple A2A agents

Ask JetBrains AI Assistant: "List all available agents and distribute parallel processing tasks"

Expected Result: Agent list displayed, tasks distributed, and progress tracked

Handle Task Results

Retrieve and process completed task results

Ask JetBrains AI Assistant: "Get the results from the data analysis task I submitted earlier"

Expected Result: Task results retrieved with processed data and analysis findings

Testing Your Setup

1. Start a new conversation in JetBrains AI Assistant
2. Ask JetBrains AI Assistant to list available tools
3. Try using A2A functionality

Test prompts:

• "Type / and look for A2A tools in the command list"
• "Ask AI Assistant to use A2A for a specific task"
• "Check the MCP settings page for connection status indicator"

Troubleshooting

Common Issues

Agent Registration Failed

Symptoms: Registration errors, Agent not found, Connection timeouts

Cause: Network connectivity issues or invalid agent configuration

Solution:

• Check internet connectivity to A2A network
• Verify agent endpoint URLs are correct
• Ensure agent is online and accepting connections
• Check firewall settings and port accessibility

Task Never Completes

Symptoms: Task stuck in pending state, No response from agent

Cause: Agent overload, network issues, or task complexity

Solution:

• Check agent status and availability
• Cancel and resubmit the task
• Break complex tasks into smaller parts
• Try different agent if available

Transport Protocol Errors

Symptoms: Connection refused, Protocol mismatch errors

Cause: Incorrect transport configuration or port conflicts

Solution:

• Verify MCP_TRANSPORT setting matches client expectations
• Check MCP_HOST and MCP_PORT are accessible
• Ensure no port conflicts with other services
• Try different transport mode (stdio, http, sse)

Message Streaming Issues

Symptoms: Broken streams, Incomplete messages, Timeout errors

Cause: Network instability or buffer overflow

Solution:

• Check network stability and bandwidth
• Reduce message frequency or size
• Enable debug logging to trace issues
• Use appropriate buffer sizes for streaming

MCP Server Not Connecting

Symptoms: Server status shows disconnected, Tools not appearing in chat, Connection timeout

Cause: Server configuration incorrect or server not starting

Solution:

• Verify server command is correct and executable
• Check environment variables are set properly
• View MCP logs: Help > Show Log in Explorer > mcp folder
• Test server command in terminal manually

Remote Server Not Supported

Symptoms: HTTP server not connecting, SSE transport errors

Cause: AI Assistant only supports stdio transport for client connections

Solution:

• Use mcp-remote proxy for remote servers
• Configuration: npx -y mcp-remote@latest https://server-url/endpoint
• This wraps HTTP/SSE in stdio transport

Import from Claude Not Working

Symptoms: No servers imported, Configuration empty after import

Cause: Claude Desktop config file not found or in unexpected location

Solution:

• Verify Claude Desktop is installed
• Check config exists at ~/Library/Application Support/Claude/claude_desktop_config.json (macOS)
• Or %APPDATA%/Claude/claude_desktop_config.json (Windows)
• Manually copy configuration if auto-import fails

External Client Cannot Connect to IDE Server

Symptoms: Client shows MCP server unavailable, Connection refused

Cause: IDE MCP server not enabled or client not configured

Solution:

• Enable MCP Server in Settings > Tools > MCP Server
• Use Auto-Configure for supported clients
• Restart both IDE and external client
• Check firewall allows local connections

Brave Mode Commands Not Running

Symptoms: Terminal commands require confirmation, Workflow interrupted by prompts

Cause: Brave mode not enabled

Solution:

• Enable in Settings > Tools > MCP Server
• Check "Run shell commands without confirmation (brave mode)"
• Use with caution - commands run without confirmation

A2A not appearing in JetBrains AI Assistant

Symptoms: Server not listed, Tools not available

Cause: Configuration or installation issue

Solution:

• Verify configuration syntax
• Check A2A installation
• Restart JetBrains AI Assistant
• Check logs for error messages

Next Steps

Now that A2A is integrated with JetBrains AI Assistant:

• Explore all A2A capabilities through JetBrains AI Assistant
• Check out other MCP servers that work with JetBrains AI Assistant
• Join the MCP community for tips and support
• Consider contributing to A2A development

Need Help?

• Search for A2A documentation
• Check the JetBrains AI Assistant MCP guide
• Join the MCP community discussions