# ARCaptcha Documentation Index

> Machine-readable index of ARCaptcha documentation, guides, and integration specifications for AI assistants and LLMs.

ARCaptcha is a modern, privacy-respecting CAPTCHA service designed to protect web and mobile applications against bots, credential stuffing, spam, and automated abuse.

## Core Documentation

- [Quick Start](https://docs.arcaptcha.co/quick%20start): Overview, credentials acquisition, rapid frontend and backend setup, and 1-click AI agent integration prompts.
- [Installation](https://docs.arcaptcha.co/installation): Step-by-step guide on adding the widget script, inserting the `.arcaptcha` container, and token verification.
- [Bypass Mode and Disaster Recovery](https://docs.arcaptcha.co/bypass-mode): Periodic heartbeat caching, server-decided widget loading, outage policy, and recovery testing; includes the [Node.js sample project](https://github.com/arcaptcha/arcaptcha-bypass-mode-demo).
- [Configuration](https://docs.arcaptcha.co/configuration): Complete reference for widget container attributes, programmatic `arcaptcha.render()`, `arcaptcha.execute()`, and lifecycle event callbacks.
- [Invisible Widget](https://docs.arcaptcha.co/invisible%20captcha): Checkbox-free ARCaptcha widget; `execute()` starts bot detection and may complete silently or show a pop-up challenge.
- [Plugins and Libraries](https://docs.arcaptcha.co/plugins): Official and community SDKs for React, Vue, Angular, Flutter, native Android and iOS, Node.js, Python, PHP, Go, C#, Ruby, Elixir, and CMSs (WordPress).
- [Verify API](https://docs.arcaptcha.co/API/Verify): Server-side REST API verification endpoint specification, parameter schema, response contract, and error code definitions.
- [Agent Skills & AI Integration](https://docs.arcaptcha.co/agent): Guide on using modern AI coding assistants (Claude Code, Cursor, ChatGPT, OpenCode) with ARCaptcha and 1-click prompts.

## Machine-Readable Specifications for AI Agents

- [Agent Onboard Specification](https://docs.arcaptcha.co/onboard.md): Complete, self-contained implementation specification and security guidelines for AI coding agents.
- [Full Documentation Context](https://docs.arcaptcha.co/llms-full.txt): Consolidated, complete technical documentation in a single high-density text file.

## Key Technical Constants

- **Widget Script (standard)**: `https://nwidget.arcaptcha.ir/1/api.js`
- **Optional Multi-domain Loader**: `https://widget.arcaptcha.ir/init.js` (tries `.ir`, `.co`, and `.net` API domains; no local captcha or failover token)
- **Heartbeat Endpoint**: `GET https://api.arcaptcha.ir/arcaptcha/api/heartbeat` (load the widget only when HTTP succeeds and JSON `OK` is `true`)
- **Verification Endpoint**: `https://api.arcaptcha.co/arcaptcha/api/verify` (HTTP POST, `Content-Type: application/json`)
- **Frontend Form Field**: `arcaptcha-token`
- **Dashboard URL**: `https://dashboard.arcaptcha.co`
- **Standard Agent Prompt**: `Please read https://docs.arcaptcha.co/onboard.md and help me integrate ARCaptcha into this project.`