AgentIndex is a searchable directory for developers exploring AI agents, Model Context Protocol (MCP) servers, agent frameworks, and related open-source tools. It brings together more than 2,600 listings across categories such as code assistance, workflow automation, retrieval-augmented generation, multi-agent systems, browser automation, and developer tooling. Updated daily, the directory helps users discover new and trending projects, review descriptions, stars, licenses, and update dates, and compare options or find alternatives.

Visitors can browse editor-selected tools, explore categories, and copy installation commands; the site also offers a command-line tool for finding resources, including MCP servers. AgentIndex describes its collection as curated to support developers building AI applications, from autonomous agents and RAG systems to editor rules for Cursor and Windsurf. It also provides information about MCP, an open standard that lets AI models connect with external data and tools through servers.

AgentIndex is a discovery and reference resource rather than the maker of every listed project, and notes that it is not affiliated with Anthropic, OpenAI, or Microsoft