# Free open-source MCP servers and agent tools

> Tools and MCP servers that give AI agents access to the web, apps and your data.

Free tools: popular open-source projects that do not replace a paid product.

## Projects, ranked
1. [Agent Reach](https://repoquarry.dev/projects/agent-reach.md): Installer and CLI that gives AI agents ready-made access to web pages, search, YouTube, GitHub, Reddit, X and Chinese platforms. Commercial use: Confirmed.
2. [Context Mode](https://repoquarry.dev/projects/context-mode.md): MCP server and plugin that keeps bulky tool output out of a coding agent's context and restores session state after compaction. Commercial use: Partial.
3. [CLI-Anything](https://repoquarry.dev/projects/cli-anything.md): Plugin and skill that generates command-line interfaces for existing desktop software so AI agents can operate it, plus a hub of ready-made CLIs. Commercial use: Confirmed.
4. [XERJ](https://repoquarry.dev/projects/xerj.md): Local search engine with an Elasticsearch-compatible API and MCP server that indexes folders so coding agents can query code instead of reading files. Commercial use: Confirmed.
5. [Headroom](https://repoquarry.dev/projects/headroom.md): Compress tool outputs, logs, files, and RAG chunks before they reach the LLM. 20% fewer tokens for coding agents, 60-95% fewer tokens for JSON, same answers. L… Commercial use: Unknown.
6. [Hol-guard](https://repoquarry.dev/projects/hol-guard.md): Open-source antivirus for AI agents: block risky tools, secret access, prompt injection, malicious packages, MCP servers, plugins, and skills at runtime. Commercial use: Unknown.
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Source: RepoQuarry (https://repoquarry.dev/categories/agent-tools). Data licence: CC BY 4.0. Quotes are from project documentation and belong to their authors.