APIWeaver + Claude.ai: 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 Claude.ai, 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 Claude.ai, 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 Claude.ai
- All APIWeaver capabilities will be available for your workflows
- Access to 6 different tools
Prerequisites
Before starting, ensure you have:
- Claude.ai installed and configured
- Compatible operating system (Web Browser)
Installation
Step 1: Install APIWeaver
Configuration
Step 2: Configure Claude.ai
- Open Claude.ai settings
- Navigate to MCP server configuration
- Add APIWeaver server with appropriate settings
- Save and restart if needed
Examples
Once configured, you can use APIWeaver in Claude.ai:
Register REST API with Authentication
Add a REST API with Bearer token authentication
Ask Claude.ai: "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 Claude.ai: "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 Claude.ai: "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 Claude.ai: "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
- Start a new conversation in Claude.ai
- Ask Claude.ai to list available tools
- Try using APIWeaver functionality
Test prompts:
- "What tools are available to me right now?"
- "Can you use APIWeaver to help me with {example_task}?"
- "Show me the capabilities from my connected MCP servers"
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
Cannot Find MCP Settings
Symptoms: No MCP option in settings, Integration menu missing
Cause: Feature may not be available in current web interface version
Solution:
- Check if your account has access to MCP features
- Try accessing from different browser or clearing cache
- Contact Anthropic support for account feature access
Server Connection Failed
Symptoms: Connection timeout, Server unreachable errors
Cause: Network connectivity or server configuration issues
Solution:
- Verify server URL is correct and accessible
- Check if server requires authentication
- Ensure server supports web client connections
- Test server connectivity from other clients
Tools Not Appearing
Symptoms: Server connected but no tools available, Empty tools list
Cause: Server connected but not properly exposing tools
Solution:
- Verify server is properly configured and running
- Check server logs for tool registration issues
- Refresh connection or reconnect to server
- Ensure server implements MCP protocol correctly
APIWeaver not appearing in Claude.ai
Symptoms: Server not listed, Tools not available
Cause: Configuration or installation issue
Solution:
- Verify configuration syntax
- Check APIWeaver installation
- Restart Claude.ai
- Check logs for error messages
Next Steps
Now that APIWeaver is integrated with Claude.ai:
- Explore all APIWeaver capabilities through Claude.ai
- Check out other MCP servers that work with Claude.ai
- Join the MCP community for tips and support
- Consider contributing to APIWeaver development
Need Help?
- Search for APIWeaver documentation
- Check the Claude.ai MCP guide
- Join the MCP community discussions