What is ClefMCP?
ClefMCP is a MCP server by HighlyLoadedEgo that local Clef-Flash decision model for coding agents: `clef_decide` returns probability distributions over your options (choice/score/yes-no) via llama.cpp, fully offline, one-command install. It is listed under Developer tools and has 7 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | HighlyLoadedEgo |
| Repository | HighlyLoadedEgo/ClefMCP |
| Popularity | 7 GitHub stars |
| Category | Developer tools |
| Security | Low risk (84/100) |
| Rank | #1,930 of 4,418 MCP servers; #433 in Developer tools |
| License | Apache-2.0 |
| Last commit | 2026-10-04 |
| Runs | Locally |
| Language | TypeScript |
| Platforms | macOS, Windows, Linux |
Is ClefMCP safe to install?
ClefMCP scores 84/100 on the MCPMods security check: Low risk. Things to review: executes code or shell commands. 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 |
| Read-only by description | Pass |
| Executes code or shell commands | Review |
| Source on GitHub | Pass |
How do I install ClefMCP?
- 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/HighlyLoadedEgo/ClefMCP
- 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 clefmcp -- <command from README> claude mcp add --transport http clefmcp <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 ClefMCP for you:
Add the "ClefMCP" MCP server from https://github.com/HighlyLoadedEgo/ClefMCP 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.