Apollo IO MCP Server + mcp-use: Complete MCP Integration
Apollo IO MCP Server is a MCP server that apollo.io mcp server. Get/enrich contact data for people and organizations agentically..
When integrated with mcp-use, you can:
- Enrich contact data for individuals with comprehensive profile information
- Enrich company data with detailed organizational information
- Advanced people search with extensive filtering options
This guide provides step-by-step instructions to set up Apollo IO MCP Server in mcp-use, including configuration, examples, and troubleshooting.
What You'll Achieve
After completing this setup:
- Apollo IO MCP Server will be fully integrated and operational
- You can use Apollo IO MCP Server tools directly in mcp-use
- All Apollo IO MCP Server capabilities will be available for your workflows
- Access to 7 different tools
Prerequisites
Before starting, ensure you have:
- Node.js
- npm
- Apollo.io API key
- Apollo.io API key for accessing enrichment services
- mcp-use installed and configured
- Compatible operating system (Python 3.8+, Node.js 16+, pip Installation, npm/yarn Installation)
Installation
Step 1: Install Apollo IO MCP Server
Install using npm:
npm install @agentx-ai/apollo-io-mcp-server
Verify installation:
npm list @agentx-ai/apollo-io-mcp-server
Configuration
Step 2: Configure mcp-use
- Open mcp-use settings
- Navigate to MCP server configuration
- Add Apollo IO MCP Server server with appropriate settings
- Save and restart if needed
Examples
Once configured, you can use Apollo IO MCP Server in mcp-use:
Enrich Contact Information
Enrich a person's profile using their email address
Ask mcp-use: "Enrich the contact information for [email protected] and get their professional background"
Expected Result: Complete profile with job title, company details, social profiles, and professional background
Find Marketing Decision Makers
Search for marketing managers at technology companies
Ask mcp-use: "Find Marketing Managers at technology companies in San Francisco with 100-500 employees"
Expected Result: List of marketing professionals with contact details, company information, and role descriptions
Company Intelligence Gathering
Get comprehensive information about a target company
Ask mcp-use: "Get detailed information about Salesforce including employee count, recent hires, and current job openings"
Expected Result: Company profile with metrics, employee data, hiring trends, and job postings
Competitive Analysis
Analyze competitors and find key contacts
Ask mcp-use: "Find all companies in the CRM software space and identify their VP of Sales contacts"
Expected Result: Competitive landscape with company profiles and key decision maker contact information
Testing Your Setup
- Launch mcp-use
- Verify Apollo IO MCP Server is available in the tools list
- Test basic Apollo IO MCP Server functionality
Troubleshooting
Common Issues
Apollo.io API Key Invalid
Symptoms: 401 Authentication errors, API key not recognized, Access denied messages
Cause: Invalid, expired, or missing Apollo.io API key
Solution:
- Generate new API key from Apollo.io settings
- Verify APOLLO_IO_API_KEY environment variable is set
- Check API key has appropriate permissions
- Ensure no extra spaces or characters in key
Rate Limiting Errors
Symptoms: 429 Too Many Requests, API quota exceeded, Rate limit messages
Cause: Exceeded Apollo.io API rate limits
Solution:
- Check your Apollo.io plan limits and usage
- Implement delays between requests
- Upgrade Apollo.io plan for higher limits
- Optimize queries to use fewer API calls
Claude Desktop Not Detecting Server
Symptoms: No tools showing up, MCP server not connected, Configuration ignored
Cause: Incorrect claude_desktop_config.json setup
Solution:
- Verify JSON syntax in configuration file
- Check file is in correct location for your OS
- Restart Claude Desktop after configuration changes
- Test server with MCP inspector first
Search Results Empty or Limited
Symptoms: No search results, Limited contact data, Enrichment fails
Cause: Search criteria too restrictive or data not available
Solution:
- Broaden search criteria and filters
- Try different search parameters
- Check if company/person exists in Apollo database
- Verify search syntax and parameter format
NPM Installation Errors
Symptoms: Package not found, Installation failures, Dependency errors
Cause: NPM registry issues or network connectivity
Solution:
- Clear NPM cache: npm cache clean --force
- Try alternative registry: npm install --registry https://registry.npmjs.org/
- Check internet connectivity and proxy settings
- Update NPM: npm install -g npm@latest
Connection Refused or Server Unreachable
Symptoms: ECONNREFUSED error, Connection timeout, Cannot reach server
Cause: MCP server not running or incorrect URL
Solution:
- Verify MCP server is running and accessible
- Check server URL is correct (protocol, host, port, path)
- Test server URL in browser or with curl to confirm it responds
- Ensure firewall allows connections to server port
- Verify CORS settings if accessing from browser
Import Errors or Module Not Found
Symptoms: ModuleNotFoundError: mcp_use, Cannot find module "mcp-use"
Cause: Package not installed or wrong environment
Solution:
- Verify installation: pip show mcp-use (Python) or npm list mcp-use (JS)
- Ensure using correct Python virtual environment or Node.js project
- Reinstall package: pip install --upgrade mcp-use or npm install mcp-use
- Check package.json or requirements.txt includes mcp-use
Tool Discovery Returns Empty List
Symptoms: list_tools() returns [], No tools available, Tools not found
Cause: MCP server not properly configured or not exposing tools
Solution:
- Verify MCP server is properly initialized and configured
- Check server logs to confirm tools are registered
- Test server directly with MCP inspector or test client
- Ensure server implements MCP protocol correctly
- Verify transport type (HTTP/SSE) matches server configuration
Tool Execution Fails or Returns Errors
Symptoms: Tool call throws exception, Invalid arguments error, Execution timeout
Cause: Incorrect arguments or server-side execution failure
Solution:
- Verify tool arguments match schema definition from list_tools()
- Check required arguments are provided with correct types
- Review server logs for detailed error messages
- Test tool with minimal valid arguments first
- Increase timeout if tool requires longer execution time
LangChain.js Integration Not Working
Symptoms: getLangChainTools() fails, Tools not recognized by agent, Type errors
Cause: Version mismatch or incorrect integration setup
Solution:
- Ensure LangChain.js version is compatible with mcp-use
- Verify TypeScript version meets requirements
- Check tool schema conversion is working correctly
- Use latest versions of both mcp-use and LangChain.js
- Review LangChain.js documentation for agent setup
Transport Type Errors (HTTP vs SSE)
Symptoms: SSE connection fails, HTTP polling not working, Event stream errors
Cause: Mismatch between client transport and server capabilities
Solution:
- Verify server supports the transport type you are using
- Try alternative transport: switch between "http" and "sse"
- Check server documentation for supported transport types
- For SSE, ensure server sends proper Content-Type: text/event-stream
- For HTTP, verify server accepts POST requests with JSON payload
Apollo IO MCP Server not appearing in mcp-use
Symptoms: Server not listed, Tools not available
Cause: Configuration or installation issue
Solution:
- Verify configuration syntax
- Check Apollo IO MCP Server installation
- Restart mcp-use
- Check logs for error messages
Next Steps
Now that Apollo IO MCP Server is integrated with mcp-use:
- Explore all Apollo IO MCP Server capabilities through mcp-use
- Check out other MCP servers that work with mcp-use
- Join the MCP community for tips and support
- Consider contributing to Apollo IO MCP Server development
Need Help?
- Search for Apollo IO MCP Server documentation
- Check the mcp-use MCP guide
- Join the MCP community discussions