What is retrieval-lens?
retrieval-lens is a MCP server by Vbj1808 that flight recorder for RAG retrieval: logs chunks, scores, sources and rankings to audit, replay and diff retrieval runs. It is listed under Developer tools and has 2 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | Vbj1808 |
| Repository | Vbj1808/retrieval-lens |
| Popularity | 2 GitHub stars |
| Category | Developer tools |
| Security | Low risk (84/100) |
| Rank | #2,832 of 4,418 MCP servers; #598 in Developer tools |
| License | MIT |
| Last commit | 2026-06-08 |
| Runs | Locally |
| Language | TypeScript |
Is retrieval-lens safe to install?
retrieval-lens scores 84/100 on the MCPMods security check: Low risk. Things to review: can take actions such as send, write or deploy. It passed 4 of 6 checks.
MCP server results come from listing signals: who publishes it, where your data goes and what it can do. The code itself is not scanned yet.
| Check | Result |
|---|---|
| Community-built server | Note |
| Runs on your machine only | Pass |
| No credentials mentioned | Pass |
| Can take actions such as send, write or deploy | Review |
| No code execution | Pass |
| Source on GitHub | Pass |
How do I install retrieval-lens?
- Find the launch command. The README says how the server starts (npx, uvx, docker or a remote URL) and which API keys it needs.
https://github.com/Vbj1808/retrieval-lens
- Add it to Claude Code. Replace the part after -- with the command from the README. Remote servers use --transport http with a URL.
claude mcp add retrieval-lens -- <command from README> claude mcp add --transport http retrieval-lens <server-url>
- Check it connected. This lists your MCP servers and their status.
claude mcp list
Or ask Claude to set it up
Paste this into Claude Code and it installs retrieval-lens for you:
Add the "retrieval-lens" MCP server from https://github.com/Vbj1808/retrieval-lens to Claude Code. Read its README for the launch command and any API keys I need, run claude mcp add, then check that it connects.