A comprehensive Model Context Protocol (MCP) server for Attio, enabling AI assistants like Claude to interact with your CRM through natural language.

Transform your CRM workflows: "Find all AI companies with 50+ employees that we haven't contacted in 30 days"

• Universal Tools: 13 tools work across all record types (companies, people, deals, lists, tasks)
• High Performance: 89.7% speed improvement with 227KB memory reduction (PR #483)
• Natural Language: Search, create, update, and manage CRM data conversationally
• Advanced Filtering: Complex multi-condition searches with relationship-based queries
• Batch Operations: Process hundreds of records efficiently with optimized formatResult architecture
• Full CRUD: Complete create, read, update, delete capabilities for all record types
• Field Mapping Excellence: Corrected field mappings with category validation and special character preservation
• Enterprise Quality: 97.15/100 production readiness score with zero breaking changes
• Clean Architecture: Complete production-test separation with mock factory pattern

# Install globally
npm install -g attio-mcp-server

# Or clone for development
git clone https://github.com/kesslerio/attio-mcp-server.git
cd attio-mcp-server
npm install

1. Get your Attio API key: Attio Developer Documentation

2. Configure environment:

   export ATTIO_API_KEY="your_api_key_here"

3. Add to Claude Desktop (~/Library/Application Support/Claude/claude_desktop_config.json):

   {
     "mcpServers": {
       "attio": {
         "command": "attio-mcp-server",
         "env": {
           "ATTIO_API_KEY": "your_api_key_here"
         }
       }
     }
   }

Once configured, interact with your Attio CRM naturally:

Find technology companies in San Francisco with more than 100 employees
Create a new deal for $50,000 with Acme Corp
Add John Smith to our Q4 prospects list
Show me all overdue tasks assigned to the sales team

• Getting Started - Detailed setup and installation
• User Guide - Common workflows and examples
• API Reference - Complete tool documentation
• Field Mapping Guide - Field validation, categories, and special characters
• Deployment - Docker and production deployment
• Development - Contributing and extending

Our formatResult architecture refactoring delivered exceptional performance gains:

• 89.7% faster execution - Optimized string formatting eliminates environment detection overhead
• 227KB memory reduction - Efficient memory management with 57.8% fewer object allocations
• 59% code quality improvement - ESLint warnings reduced from 957 to 395
• 100% type safety - Eliminated dual return types and environment-dependent behavior
• Zero breaking changes - Complete backward compatibility maintained

• Clean Separation: Complete production-test isolation with mock factory pattern
• Mock Factory Architecture: Centralized test data generation for Issue #480 compatibility
• Environment Independence: No runtime behavior changes based on NODE_ENV
• Type Safety: Consistent string return types across all formatResult functions

See our Performance Report and Architecture Guide for technical details.

# Quick start with Docker
docker run -e ATTIO_API_KEY=your_key_here attio-mcp-server

# Or use Docker Compose
echo "ATTIO_API_KEY=your_key_here" > .env
docker-compose up -d

The project maintains high-quality test coverage with modern mock factory architecture:

• E2E Tests: 76% success rate (29/38 passing) with Issue #480 compatibility
• Integration Tests: 100% success rate with real API validation
• Unit Tests: 100% success rate (26/26 passing) with clean architecture
• Performance Tests: Environment-aware budgets with dual testing strategy
• Mock Factory Pattern: Complete production-test separation for reliable testing

See our Testing Guide, Mock Factory Pattern, and Production-Test Separation for details.

We welcome contributions! See our Contributing Guide for details on:

• Setting up the development environment
• Running tests and linting
• Submitting pull requests
• Code standards and best practices

This project is licensed under the Apache License 2.0. See LICENSE for details.

• Documentation: Full Documentation
• Issues: Report bugs or request features
• Smithery: Install via Smithery
• Attio: Learn more about Attio CRM

Need help? Check our troubleshooting guide or open an issue.