Attio

This connects Claude to Attio's CRM through the Membrane platform, handling auth and credential refresh automatically so you can focus on the actual integration work. You get pre-built actions for common operations like listing records, creating tasks, and managing list entries, plus a proxy for direct API calls when you need something specific. It's designed for agents that need to manage customer data, update deals, or automate CRM workflows without dealing with OAuth plumbing. The Membrane CLI approach means less token burn on auth logic and more on actual business logic. Works with free tier Membrane accounts, covers all the standard CRM objects you'd expect, and includes wait-state handling for connection setup.