What is a2cr?
a2cr is a MCP server by a2cr that agent handoffs via client-encrypted WorkBaton checkpoints and WorkStash notes, so work can resume in another client without the full chat history. It is listed under Knowledge & memory and has 2 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | a2cr |
| Repository | a2cr/a2cr |
| Popularity | 2 GitHub stars |
| Category | Knowledge & memory |
| Security | Low risk (84/100) |
| Rank | #2,917 of 4,418 MCP servers; #308 in Knowledge & memory |
| License | Apache-2.0 |
| Last commit | 2026-10-01 |
| Runs | Locally and in the cloud |
| Language | Python |
| Platforms | macOS, Windows, Linux |
Is a2cr safe to install?
a2cr 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 a2cr?
- 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/a2cr/a2cr
- 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 a2cr -- <command from README> claude mcp add --transport http a2cr <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 a2cr for you:
Add the "a2cr" MCP server from https://github.com/a2cr/a2cr 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.