What is jsr-mcp?
jsr-mcp is a MCP server by wyattjoh that access JSR, the JavaScript Registry. It is listed under Developer tools and has 4 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | wyattjoh |
| Repository | wyattjoh/jsr-mcp |
| Popularity | 4 GitHub stars |
| Category | Developer tools |
| Security | Low risk (84/100) |
| Rank | #2,337 of 4,418 MCP servers; #527 in Developer tools |
| License | MIT |
| Last commit | 2026-01-11 |
| Runs | Cloud service |
| Language | TypeScript |
Is jsr-mcp safe to install?
jsr-mcp scores 84/100 on the MCPMods security check: Low risk. Things to review: sends your data to a cloud service. 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 |
| Sends your data to a cloud service | Review |
| No credentials mentioned | Pass |
| Read-only by description | Pass |
| No code execution | Pass |
| Source on GitHub | Pass |
How do I install jsr-mcp?
- 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/wyattjoh/jsr-mcp
- 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 jsr-mcp -- <command from README> claude mcp add --transport http jsr-mcp <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 jsr-mcp for you:
Add the "jsr-mcp" MCP server from https://github.com/wyattjoh/jsr-mcp 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.