diff --git a/README.md b/README.md
index 11b63ae..37e9a9b 100644
--- a/README.md
+++ b/README.md
@@ -212,6 +212,7 @@ Autonomous AI agents that work on existing codebases to fix bugs, refactor code,
 
 Tools for understanding, navigating, and getting answers about existing codebases:
 
+- [4DA / @4da/mcp-server](https://www.npmjs.com/package/@4da/mcp-server) — Desktop app + MCP server (36 tools) that gives AI coding assistants awareness of your tech stack, dependencies, and decisions. Scores content from HN, arXiv, Reddit, GitHub against your codebase. Live vulnerability scanning via OSV.dev. Privacy-first — everything stays local. `npx @4da/mcp-server`
 - [Sourcegraph Cody](https://about.sourcegraph.com/cody) — Assistant with chat, refactoring, and unit test generation. Extensions for VS Code and IntelliJ. Also available as a web app.
 - [Unblocked](https://getunblocked.com/) — Augment source code with relevant existing knowledge in GitHub, Slack, Jira, Confluence, and more. Get answers through chat and IDE file-level context. Available on web, macOS, Slack, VS Code, and JetBrains IDEs.
 - [Magnet](https://www.magnet.run/) — AI-native workspace for building software with repositories and issues as context.