What ACI.dev does
ACI.dev is an open-source tool-calling platform that connects AI agents to more than 600 pre-built application integrations, with multi-tenant OAuth flows and secrets management, natural-language permission boundaries and dynamic tool discovery built in. Agents reach those integrations either as direct function calls through its SDK or through its Model Context Protocol servers: an Apps MCP server that exposes the functions of specific apps and can carry several apps at once, and a Unified MCP server that exposes two meta-functions for discovering and executing any function on the platform.
Why teams reach for it: ACI.dev covers both halves of putting a SaaS account behind an agent: it stores each end-user's OAuth tokens and API keys against a Linked Account Owner ID so agents act on behalf of a specific user, and its Unified MCP server hands the agent two meta-functions to search for and execute any function on the platform at call time rather than loading every tool definition into the context window.
How ACI.dev compares
Fields the vendor doesn't document are left blank here rather than guessed — a blank means nothing verified, not a "no."
- Credential Storage Location
- Vendor cloud
How will tools receive safe access to external systems?
Credentials & connections tools manage how an MCP server safely accesses external systems, like databases or APIs, on a user's behalf.