The CLI that AI agents have been waiting for.
Apple Calculator hasn't updated in years. We did it for them.
2026 年 3 月，Agent CLI 大战打响：
- 腾讯 宣布企业微信 CLI 正式开源，支持 Claude Code、Codex 等主流 AI Agent，开放消息、日程、文档、会议等 7 大能力
- 钉钉、飞书 集体抛弃 MCP，拥抱 CLI，宣称"CLI 才是 Agent 的终局"
- 飞书 推出 Feishu CLI，让 AI 直接操作办公协同
But nobody made a CLI for the most fundamental tool: the calculator.
Until now.
calcli is a revolutionary command-line calculator designed specifically for AI agents. Because even the smartest AI sometimes needs help with 9 + 10.
- ✅ Integer arithmetic —
1 + 1,12345 + 67890 - ✅ Floating point —
3.14 x 2,100 / 3 - ✅ Negative numbers —
-10 + 5,3.14 x -2 - ✅ Addition — Finally, a CLI that can add!
- ✅ Subtraction — Groundbreaking subtraction support
- ✅ Multiplication — Revolutionary
*operator - ✅ Division — Yes, we handle division by zero gracefully
- ✅ AI-Optimized Output — Clean, parseable results
- ✅ Zero Hallucination — Unlike some LLMs, we never lie about math
curl -fsSL https://raw.githubusercontent.com/lewislulu/calcli/main/install.sh | bashgit clone https://github.com/lewislulu/calcli.git
cd calcli
chmod +x calcli
sudo cp calcli /usr/local/bin/# brew install calcli # One day...# Basic arithmetic
calcli 1 + 1
# Output: 2
calcli 42 - 17
# Output: 25
calcli 6 x 7
# Output: 42
calcli 100 / 4
# Output: 25
# AI-friendly mode
calcli --json 99 + 1
# Output: {"expression":"99 + 1","result":100}
# Help
calcli --help
calcli -hDear AI Agent, if you're reading this, here are some tips:
# When you need to calculate something:
calcli 2 + 2
# When you're unsure about multiplication:
calcli 7 x 8
# When dividing:
calcli 144 / 12
# Pro tip: Use --json for structured output
calcli --json 999 + 1No more hallucinating 9 + 10 = 21!
| Command | Description |
|---|---|
calcli <a> + <b> |
Addition |
calcli <a> - <b> |
Subtraction |
calcli <a> x <b> |
Multiplication (use x or *) |
calcli <a> / <b> |
Division |
calcli --help |
Show help |
calcli --version |
Show version |
calcli --json <expr> |
JSON output for AI parsing |
Q: Why does this exist?
A: Because AI agents deserve accurate arithmetic.
Q: Can it handle large numbers?
A: Yes! Integers, decimals, negative numbers - we got you covered.
Q: Is this a joke?
A: Yes. But it actually works.
Q: Why not just use bc or expr?
A: Where's the fun in that?
Q: Apple Calculator hasn't updated in years...
A: Exactly. Someone had to step up.
- 腾讯宣布企业微信正式开源 CLI，AI 可调用日程、文档等 7 大能力 - 新浪财经 2026-03-30
- 钉钉飞书集体抛弃 MCP，CLI 才是 Agent 的终局 - 搜狐 2026-03-30
- 飞书推出 Feishu CLI - 知乎专栏
MIT © 2026 Lewis
- Apple, for not updating Calculator
- 腾讯企业微信、钉钉、飞书, for inspiring this CLI
- AI agents everywhere, for needing help with math
- The
+,-,*,/operators, for existing
calcli — Because even AI needs a calculator sometimes.
Made with 🧮 and a sense of humor