What is semgrep?
semgrep is a MCP server by semgrep that scan code for security vulnerabilities using Semgrep. It is listed under Security and has 17,111 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | semgrep |
| Repository | semgrep/semgrep |
| Popularity | 17,111 GitHub stars |
| Category | Security |
| Security | Low risk (88/100) |
| Rank | #39 of 4,418 MCP servers; #1 in Security |
| License | LGPL-2.1 |
| Last commit | 2026-10-16 |
| Stars this week | +135 |
| Runs | Cloud service |
| Language | Python |
Is semgrep safe to install?
semgrep scores 88/100 on the MCPMods security check: Low risk. Things to review: sends your data to a cloud service. It passed 5 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 |
|---|---|
| Published by the service itself | Pass |
| 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 semgrep?
- 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/semgrep/semgrep/tree/develop/cli/src/semgrep/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 semgrep -- <command from README> claude mcp add --transport http semgrep <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 semgrep for you:
Add the "semgrep" MCP server from https://github.com/semgrep/semgrep/tree/develop/cli/src/semgrep/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.