Connecting an AI agent to your whole SaaS stack usually means building a separate OAuth flow and API client for every service. ACI.dev is an open-source tool-calling platform that wants to take that work off your plate.
It connects to more than 600 pre-built integrations and handles authentication for you, so your agent can call those tools through direct functions or one unified MCP server.
What Happened
ACI.dev is released under the Apache 2.0 license and works with agentic IDEs and custom AI agents.
- 600+ integrations for popular services and applications, ready to plug in.
- A unified MCP server or a lightweight SDK for direct function calling.
- Multi-tenant OAuth flows and secrets management for developers and end users.
- Natural-language permission boundaries and dynamic tool discovery to keep agents reliable.
- Tool-use logging so teams can inspect every agent call and the issues it hit.
Why It Matters
Instead of stitching together separate API clients, you get one platform that manages auth and exposes every tool consistently. The permission boundaries and logging also give you a clearer picture of what your agent is actually doing. If you are building agents that touch multiple SaaS tools, this is a solid base to build on.
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