APIWeaver + Roo Code: Complete MCP Integration

APIWeaver is a MCP server that An MCP server that dynamically creates MCP servers from web API configurations. This allows you to easily integrate any REST API, GraphQL endpoint, or web service into an MCP-compatible tool that can be used by AI assistants like Claude..

When integrated with Roo Code, you can:

• Register and configure APIs at runtime without server restart
• Support for REST APIs, GraphQL endpoints, and web services
• Multiple authentication methods for different API requirements

This guide provides step-by-step instructions to set up APIWeaver in Roo Code, including configuration, examples, and troubleshooting.

What You'll Achieve

After completing this setup:

• APIWeaver will be fully integrated and operational
• You can use APIWeaver tools directly in Roo Code
• All APIWeaver capabilities will be available for your workflows
• Access to 6 different tools

Prerequisites

Before starting, ensure you have:

• Roo Code installed and configured
• Compatible operating system (Windows, macOS, Linux)

Installation

Step 1: Install APIWeaver

Configuration

Step 2: Configure Roo Code

1. Locate your configuration file:

   • Windows: %USERPROFILE%\.roo\mcp_settings.json
   • macOS: ~/.roo/mcp_settings.json
   • Linux: ~/.roo/mcp_settings.json

2. Add server configuration:

{
  "mcpServers": {
    "apiweaver": {
      "command": "npx",
      "args": ["-y", "apiweaver"],
      "env": {
        
      }
    }
  }
}

3. Restart Roo Code

Completely quit and restart Roo Code to load the new configuration.

Examples

Once configured, you can use APIWeaver in Roo Code:

Register REST API with Authentication

Add a REST API with Bearer token authentication

Ask Roo Code: "Register the JSONPlaceholder API (https://jsonplaceholder.typicode.com) with GET and POST methods"

Expected Result: API registered successfully with auto-generated tools for posts, users, and comments endpoints

GraphQL Endpoint Integration

Connect to a GraphQL API for data querying

Ask Roo Code: "Register the GitHub GraphQL API with authentication and create tools for repository queries"

Expected Result: GraphQL endpoint configured with query tools for repositories, issues, and user data

API Testing and Validation

Test API connectivity before integration

Ask Roo Code: "Test connection to the Stripe API with my API key before registering it"

Expected Result: Connection test successful with API schema validation and endpoint verification

Multi-API Workflow

Integrate multiple APIs for complex workflows

Ask Roo Code: "Register both Twitter API and SendGrid API to create a workflow for social media monitoring and email alerts"

Expected Result: Both APIs registered with tools for tweet monitoring, email sending, and automated workflow execution

Testing Your Setup

1. Start a new conversation in Roo Code
2. Ask Roo Code to list available tools
3. Try using APIWeaver functionality

Test prompts:

• "Type @ and verify APIWeaver appears in the tools list"
• "Ask: "Use APIWeaver to help with my task""
• "Check Roo Code output panel for server connection status"

Troubleshooting

Common Issues

API Registration Failed

Symptoms: Registration errors, Invalid API configuration, Connection timeouts

Cause: Incorrect API URL, authentication issues, or network problems

Solution:

• Verify API endpoint URL is accessible
• Check authentication credentials are valid
• Test API manually with curl or Postman first
• Ensure network connectivity and firewall settings

Authentication Not Working

Symptoms: 401 Unauthorized, 403 Forbidden, Auth token invalid

Cause: Incorrect authentication method or invalid credentials

Solution:

• Verify authentication method matches API requirements
• Check API key/token is not expired
• Confirm header format and parameter names
• Test authentication with API documentation examples

Transport Mode Not Connecting

Symptoms: Connection refused, Transport errors, Client not recognizing server

Cause: Incorrect transport configuration or port conflicts

Solution:

• Use streamable-http for modern clients
• Check port is not in use: netstat -an | grep :8000
• Verify host/port settings match client configuration
• Try different transport modes (stdio/http/sse)

Python Dependencies Missing

Symptoms: Import errors, Module not found, Package installation failures

Cause: Missing Python packages or virtual environment issues

Solution:

• Install requirements: pip install -r requirements.txt
• Create virtual environment: python -m venv apiweaver-env
• Activate environment before installation
• Upgrade pip: python -m pip install --upgrade pip

API Schema Generation Failed

Symptoms: Tool generation errors, Schema parsing failures, Endpoint mapping issues

Cause: Unsupported API format or incomplete API documentation

Solution:

• Provide OpenAPI/Swagger specification if available
• Start with simple GET endpoints first
• Manually configure complex APIs step by step
• Check API documentation for required parameters

MCP Server Not Connecting

Symptoms: Server not appearing in tools list, Connection timeout, MCP tools unavailable

Cause: Incorrect configuration or server not starting

Solution:

• Verify mcp_settings.json syntax is correct
• Check that Node.js and npx are installed and in PATH
• View Roo Code output panel for error messages
• Test server command manually in terminal: npx -y {server_id}
• Ensure environment variables are properly set

Permission Denied Errors

Symptoms: Cannot execute commands, File access denied, Terminal commands blocked

Cause: Roo Code requires explicit permission for file and command operations

Solution:

• Review and approve permission requests when prompted
• Check VS Code workspace trust settings
• Enable necessary permissions in Roo Code settings
• Verify file and folder permissions on your system

API Key or Model Issues

Symptoms: Authentication failed, Model not responding, No AI completions

Cause: AI model API key not configured or invalid

Solution:

• Verify API key is correctly set in Roo Code settings
• Check API key has sufficient credits/quota
• Test with a different AI model provider
• Review Roo Code output panel for API error details

Custom Mode Not Working with MCP

Symptoms: MCP tools not available in custom mode, Mode cannot access server

Cause: Custom mode configuration does not include MCP tool permissions

Solution:

• Edit custom mode configuration to include MCP tools
• Add "Use MCP" to available tools in mode definition
• Ensure mode has appropriate permissions for external tools
• Test with default mode first to verify MCP server works

Extension Conflicts

Symptoms: Roo Code not responding, VS Code performance issues, Unexpected behavior

Cause: Conflicts with other AI coding extensions

Solution:

• Disable other AI coding extensions (Cline, Continue, etc.)
• Restart VS Code after disabling conflicting extensions
• Check VS Code extension logs for conflict errors
• Use only one AI coding assistant extension at a time

APIWeaver not appearing in Roo Code

Symptoms: Server not listed, Tools not available

Cause: Configuration or installation issue

Solution:

• Verify configuration syntax
• Check APIWeaver installation
• Restart Roo Code
• Check logs for error messages

Next Steps

Now that APIWeaver is integrated with Roo Code:

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

Need Help?

• Search for APIWeaver documentation
• Check the Roo Code MCP guide
• Join the MCP community discussions