What is arno?
arno is a MCP server by julianbei that iDE for agents: read code by symbol, edit with compiler diagnostics, validate with the project's own build and tests, and revert to checkpoints. It is listed under Developer tools and has no public popularity data yet.
| Type | Mcp server |
|---|---|
| Author | julianbei |
| Repository | julianbei/arno |
| Popularity | no public popularity data yet |
| Category | Developer tools |
| Security | Low risk (84/100) |
| Rank | #3,916 of 4,418 MCP servers; #715 in Developer tools |
| License | Apache-2.0 |
| Last commit | 2026-10-05 |
| Runs | Locally |
| Language | Go |
| Platforms | macOS, Linux |
Is arno safe to install?
arno 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 arno?
- 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/julianbei/arno
- 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 arno -- <command from README> claude mcp add --transport http arno <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 arno for you:
Add the "arno" MCP server from https://github.com/julianbei/arno 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.