Tool-Calling Platform as a Service

Tool-Calling as a Service for Agentic Products

A tool-calling platform purpose-built for custom AI products and platforms. Function calling SDKs and a unified MCP server expose 600+ integrations with built-in OAuth, secrets, and policy controls.

600+ Integrations

Pre-built tool connections ready to use

Unified MCP Server

Single connection for all tools

Enterprise Security

OAuth, secrets, and policy controls

Ship tool-use fast

Build AI products that connect to hundreds of tools without managing OAuth flows, API keys, or integration complexity.

Reduce time to market

Skip months of integration work with pre-built connectors

Focus on your product

Let ACI.dev handle OAuth, secrets, and API management

Scale with confidence

Enterprise-grade security and reliability built-in

Unified interface

Access all tools through one MCP server or SDK

600+

Pre-built integrations

Unified MCP server

100%

Open source

OAuth setup required

Enhance AI Agents through Function Calling or a Unified MCP Server

ACI.dev's open-source tool-use platform and Unified MCP Server turns 600+ functions into two simple tools—search and execute—accessed through SDKs or one single MCP server. Comes with multi-tenant auth and natural-language permission controls.

100% open-source under Apache 2.0

Unified MCP Server

Supercharge your AI agent with a single MCP server and two tools to dynamically access 600+ integrations.

Secure Authentication

Authorize AI agents with access to user accounts through OAuth. ACI.dev handles all the token pains and OAuth client setups.

Agent Playground

Check that agents can use tools properly before you write code.

Unified MCP Server

{
  "mcpServers": {
    "aci-mcp-unified": {
      "command": "uvx",
      "args": ["aci-mcp@latest", "unified-server", "--linked-account-owner-id", "<LINKED_ACCOUNT_OWNER_ID>", "--allowed-apps-only"],
      "env": {
        "ACI_API_KEY": "<YOUR_ACI_API_KEY>"
      }
    }
  }
}

Everything you need to build

Complete tool-calling infrastructure for AI products and platforms

Pre-built Tool Integrations

Effortlessly integrate 600+ essential tools including Gmail, Hubspot, Notion, and Slack into your AI agents with just one connection.

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Managed Agent Authentication

Authorize AI agents with access to user accounts through OAuth. ACI.dev handles all the token pains and OAuth client setups.

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Secure Agent Secrets Manager

Store and manage credentials for web browsing AI agents. Set access policies to enhance security and reliability.

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Unified MCP Server

Connect your MCP client to any tool available on ACI.DEV through a single unified MCP server. Search, plan, and execute tools by intent with just one connection.

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Tool Discovery

Have the flexibility to allow AI agents to dynamically discover tools and workflows best suited to their task at hand.

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Natural Language Permissions

Set granular permissions with natural language that prevent API execution when AI agents make erroneous API requests. Drastically improve agent reliability.

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600+ integrations ready to use

Connect to all the tools your AI agents need, from productivity apps to enterprise platforms

SeamlessToolIntegrations

Accelerate your AI development and start building production-grade AI agents today, with 600+ tooling integrations, all featuring built-in OAuth and secrets management.