What is mcp-abacus?
mcp-abacus is a MCP server by laszlopere that offline calculator that evaluates expressions in fixed-point, IEEE-754 double or exact rational arithmetic, labelling each answer exact or inexact. It is listed under Developer tools and has 1 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | laszlopere |
| Repository | laszlopere/mcp-abacus |
| Popularity | 1 GitHub stars |
| Category | Developer tools |
| Security | Low risk (96/100) |
| Rank | #3,262 of 4,418 MCP servers; #670 in Developer tools |
| License | GPL-3.0 |
| Last commit | 2026-10-13 |
| Runs | Locally |
| Language | Python |
| Platforms | macOS, Linux |
Is mcp-abacus safe to install?
mcp-abacus scores 96/100 on the MCPMods security check: Low risk. No checks raised a concern. 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 |
|---|---|
| Community-built server | Note |
| Runs on your machine only | Pass |
| No credentials mentioned | Pass |
| Read-only by description | Pass |
| No code execution | Pass |
| Source on GitHub | Pass |
How do I install mcp-abacus?
- 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/laszlopere/mcp-abacus
- 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 mcp-abacus -- <command from README> claude mcp add --transport http mcp-abacus <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 mcp-abacus for you:
Add the "mcp-abacus" MCP server from https://github.com/laszlopere/mcp-abacus 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.