ACI.dev: 600+ Tools for AI Agents with Built-In Auth and MCP Support

ACI.dev is an open-source infrastructure platform designed specifically for AI agents. It provides agents with access to more than 600 tools, all managed through a unified Model Context Protocol (MCP) server.

Previously, connecting an AI agent to services like Google Calendar or Slack required building custom OAuth flows and API clients for every integration—a tedious and time-consuming process. ACI.dev simplifies this by centralizing authentication. Agents receive secure, standardized function calls, while developers can access the entire ecosystem through either a single MCP server or a lightweight Python SDK compatible with any LLM framework.

600+ Pre-Built Integrations: Connect to popular services in minutes rather than days.

Flexible Access: Utilize the unified MCP server or invoke functions directly through the SDK.

Multi-Tenant Authentication: Built-in OAuth flows and secret management support both developers and their end users.

Enhanced Agent Reliability: Natural-language permission boundaries and dynamic tool discovery ensure predictable agent behavior.

Framework and Model Agnostic: Compatible with any LLM framework or agent architecture.

100% Open Source: The backend, developer portal, and all integrations are released under the Apache 2.0 license.

ACI.dev handles the more complex aspects of agent infrastructure, securely connecting multiple users to various third-party services. It helps agents identify the correct tools without overwhelming the context window and establishes human-readable guardrails to govern agent actions.

Developers can build personal assistant chatbots that search the web, manage calendars, send emails, and interact with SaaS tools. The platform also enables the deployment of research agents that investigate topics and sync findings directly to Notion or Google Sheets. Sales teams can automate lead generation, outreach, and CRM updates, while support agents can resolve tickets and perform actions based on customer queries.

Hosted Service: www.aci.dev

Documentation: www.aci.dev/docs/introduction/overview

Available Tools: www.aci.dev/tools

Python SDK: github.com/aipotheosis-labs/aci-python-sdk

Unified MCP Server: github.com/aipotheosis-labs/aci-mcp

Example Agents: github.com/aipotheosis-labs/aci-agents

Blog: www.aci.dev/blog

Community: Discord, Twitter/X, LinkedIn

To deploy the full ACI.dev platform locally (including the backend server and frontend portal), refer to the README files provided for each component: backend/README.md and frontend/README.md.