What is calculator-server?
calculator-server is a MCP server by avisangle that mathematical computations: basic arithmetic, advanced functions, statistical analysis, unit conversions and financial calculations. It is listed under Data & databases and has 7 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | avisangle |
| Repository | avisangle/calculator-server |
| Popularity | 7 GitHub stars |
| Category | Data & databases |
| Security | Low risk (96/100) |
| Rank | #1,952 of 4,418 MCP servers; #143 in Data & databases |
| Last commit | 2025-09-19 |
| Runs | Locally |
| Language | Go |
Is calculator-server safe to install?
calculator-server 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 calculator-server?
- 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/avisangle/calculator-server
- 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 calculator-server -- <command from README> claude mcp add --transport http calculator-server <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 calculator-server for you:
Add the "calculator-server" MCP server from https://github.com/avisangle/calculator-server 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.