AgentIndex

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Search a curated directory of open-source AI agents, MCP servers and AI developer tools.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "AgentIndex": {
      "url": "https://agentindex.app/api/mcp/",
      "transport": "streamable-http"
    }
  }
}

Measured tools (5)

• search_tools read-only

  Find AI agents, MCP servers and AI developer tools in the AgentIndex directory by keyword and/or category. Use this when the user describes a need ("MCP server for Postgres", "browser automation agent"); use get_trending instead to browse the best tools without a query. Every keyword must appear (case-insensitive) in the name, description, tags or category. Results are ordered by rank_score, highest first. Returns an array of {id, name, category, description, stars, website, github_url, tags, rank_score}; an empty array means no match, so retry with fewer or broader keywords. Pass an id to get_tool_detail for features, use cases and the install command.

  Parameters:

  • limit — integer — Maximum number of results (1-50, default 10).
  • query — string — Space-separated keywords, all of which must match, e.g. "postgres mcp" or "browser automation". Omit to list the top tools of a category.
  • category — string — Exact category name from list_categories (case-insensitive), e.g. "Browser Automation" or "RAG / Knowledge Base". Omit to search all categories.

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world no

• get_tool_detail read-only

  Get the full AgentIndex record for one tool when you already have its id (from search_tools, get_trending or an AgentIndex URL such as agentindex.app/en/tool/<id>/). Returns name, description, long intro, summary, features, use cases, pros and cons, when to choose or skip it, compatibility, install command, license, stars, last update date, tags, rank_score, website and GitHub URL. Fields that were never filled in are omitted. Returns an isError result if no tool has that id; use search_tools to find the right id.

  Parameters:

  • id (required) — string — Tool id exactly as returned by search_tools or get_trending, usually "<github-owner>-<repo>", e.g. "hangwin-mcp-chrome".

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world no

• list_categories read-only

  List every category in the AgentIndex directory with the number of tools in it, largest first. Call this before using the category filter of search_tools to get valid names, or to give the user an overview of the directory. Returns an array of {category, count}. Takes no arguments.

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world no

• get_trending read-only

  Get the highest-ranked tools across the whole AgentIndex directory, for questions like "what are the best/most popular open-source AI tools right now". Ranking is by rank_score (0-100), which combines GitHub stars, how recently the repository was updated and the quality of its documentation; it is not a weekly-growth chart. Use search_tools instead when the user needs a specific kind of tool. Returns an array of {id, name, category, description, stars, rank_score, ai_tags, website, github_url}.

  Parameters:

  • limit — integer — Number of tools to return (1-50, default 10).

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world no

• submit_tool

  Suggest a GitHub repository (an AI agent, MCP server or AI developer tool) for listing on AgentIndex. No login or API key needed. The submission is queued for human review, usually within 1-3 days; it does not appear in search results immediately. Tools are listed only if the repository is public and has at least 100 stars. Check with search_tools first that the tool is not already listed. Returns {success, message, github_url}, or an isError result if the URL is not a GitHub repository URL or the submission service is unavailable.

  Parameters:

  • github_url (required) — string — Repository URL in the form https://github.com/<owner>/<repo>, e.g. https://github.com/modelcontextprotocol/servers.
  • email — string — Optional address that receives an email when the review is done. Only send it if the user provided it.

  Hints: read-only no · destructive no · idempotent yes · open-world yes

Publisher website

Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.