# Charter

> Open-source (Apache-2.0) Python library for AI agents that act in your customers' accounts through APIs: each tool is a Pydantic model that mirrors the API field by field with your rules on top, every call is validated before it is sent, the customer a call is for comes from your app rather than the model, and the same declarations produce a reviewable map of everything each tool can reach. Runs in your process with no proxy or telemetry; works with any HTTP API. pip install charter-ai.

- Official site: https://github.com/r28ai/charter
- Category: [Frameworks & Dev Tools](https://digidle.com/category/dev-tools/)
- Tags: agents, security, open-source
- Pricing: not verified by Digidle; see the official site.
- Listing page: https://digidle.com/tools/charter/
- Alternatives page: https://digidle.com/alternatives/charter/

## Other Frameworks & Dev Tools tools

- [Proa](https://digidle.com/tools/proa.md): Batteries-included Rust web framework with fast server rendering and multi-target rendering (HTML, Markdown and more) from one typed component.
- [Sygal](https://digidle.com/tools/sygal.md): Local-first Mac and Windows app plus CLI that converts PDFs, Office files, scans and web pages into clean Markdown or JSON for AI prompts and pipelines.
- [Weatherdeck](https://digidle.com/tools/weatherdeck.md): Open-source, read-only status board for TV or phone showing what your AI coding agent lanes and machines are doing and what is waiting on you.
- [Sphinx](https://digidle.com/tools/sphinx.md): Free, MIT-licensed Git hook that quizzes you on what your coding agent's diff actually does before a push to protected branches goes through; works with Claude Code, Codex, Cursor or plain Git.
- [llmspeed](https://digidle.com/tools/llmspeed.md): Open-source simulator that lets you feel a local LLM's tokens/sec and time-to-first-token on a chosen GPU or Mac before you buy the hardware, based on community benchmarks.
- [esp32sim](https://digidle.com/tools/esp32sim.md): Open-source (MIT) ESP32 emulator written in Rust that runs real firmware locally or in the browser, with no hardware or cloud needed.
- [siltop](https://digidle.com/tools/siltop.md): Rust terminal system monitor for Apple Silicon Macs showing CPU, GPU, power, clocks, temperatures and processes, without sudo or telemetry.
- [WhatsApp MCP](https://digidle.com/tools/whatsapp-mcp.md): Open-source (MIT), read-only MCP server you deploy to your own Cloudflare account so Claude Code or any MCP client can search and read your WhatsApp chats; it can't send messages and is unofficial (uses the WhatsApp Web protocol).

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Source: Digidle Tools (https://digidle.com/), a curated directory of developer and vibe-coding tools. Full index: https://digidle.com/llms.txt