A2A + Amazon Q CLI: 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 Amazon Q CLI, 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 Amazon Q CLI, 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 Amazon Q CLI
• All A2A capabilities will be available for your workflows
• Access to 4 different tools

Prerequisites

Before starting, ensure you have:

• Amazon Q CLI installed and configured
• Compatible operating system (Windows, macOS, Linux)

Installation

Step 1: Install A2A

Configuration

Step 2: Configure Amazon Q CLI

1. Install Amazon Q CLI

Download and install Q CLI for your platform

Visit: https://docs.aws.amazon.com/amazonq/latest/qdeveloper-ug/command-line-installing.html

2. Authenticate

Set up authentication with AWS Builder ID or IAM Identity Center

q auth

Note: Follow interactive authentication flow

3. Verify Installation

Test Q CLI installation and configuration

q doctor

4. Install MCP Server

Install the MCP server you want to integrate

Note: Ensure server is accessible from command line

5. Configure MCP Integration

Add MCP server configuration to Q CLI

Note: Use q config commands to set server parameters

6. Test Integration

Verify MCP server works with Q CLI

q chat "Use A2A to help me"

Configuration Details

Configure MCP servers through Q CLI commands:

# Configure MCP server integration
q config set mcp.servers.a2a.command "a2a"
q config set mcp.servers.a2a.args ""
q config set mcp.servers.a2a.env ""MCP_TRANSPORT": "streamable-http",
        "MCP_HOST": "0.0.0.0",
        "MCP_PORT": "8080",
        "MCP_PATH": "/api/mcp",
        "MCP_DEBUG": "true""

# Verify configuration
q config list mcp.servers

Examples

Once configured, you can use A2A in Amazon Q CLI:

Register and Communicate with Agent

Set up communication with an A2A agent

Ask Amazon Q CLI: "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 Amazon Q CLI: "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 Amazon Q CLI: "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 Amazon Q CLI: "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. Run q doctor to verify system health
2. Start Q CLI chat session
3. Ask Q to list available MCP tools
4. Test specific A2A functionality

Test commands:

q doctor

q chat

q config list mcp.servers

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

Installation Failed

Symptoms: Q command not found, Installation errors

Cause: Incomplete installation or PATH issues

Solution:

• Verify installer completed successfully
• Check PATH environment variable includes Q CLI
• Try running q doctor for diagnostics
• Reinstall using platform-specific method

Authentication Problems

Symptoms: Auth errors, Cannot connect to AWS services

Cause: Invalid credentials or network issues

Solution:

• Run q auth to re-authenticate
• Verify AWS Builder ID or IAM credentials
• Check network connectivity to AWS
• Ensure proper AWS permissions are set

MCP Server Not Found

Symptoms: Server command not found, MCP tools unavailable

Cause: Server not installed or not in PATH

Solution:

• Verify MCP server installation
• Check server executable permissions
• Use absolute path in configuration
• Test server independently with direct command

Configuration Errors

Symptoms: Config commands fail, Settings not persisting

Cause: Invalid configuration syntax or permissions

Solution:

• Check Q CLI configuration file permissions
• Verify configuration syntax is correct
• Use q config list to review current settings
• Report issues with q issue command

A2A not appearing in Amazon Q CLI

Symptoms: Server not listed, Tools not available

Cause: Configuration or installation issue

Solution:

• Verify configuration syntax
• Check A2A installation
• Restart Amazon Q CLI
• Check logs for error messages

Next Steps

Now that A2A is integrated with Amazon Q CLI:

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

Need Help?

• Search for A2A documentation
• Check the Amazon Q CLI MCP guide
• Join the MCP community discussions