capmonster-mcp-captcha-solver

# CapMonster Cloud MCP Server (Model Context Protocol)

[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
[![MCP Protocol](https://img.shields.io/badge/MCP-Supported-blue.svg)](https://modelcontextprotocol.io/)

An **Model Context Protocol (MCP)** server for CapMonster Cloud, available as a Python package
and as a TypeScript port ([`ts/`](ts)).

This server is the **solve brain**: it lists supported captcha types, serves CapMonster's live
docs, and creates/polls solve tasks against the CapMonster Cloud REST API. It has **no browser of
its own** — pair it with a browser-driving MCP (e.g.
[`capmonster-mcp-patchright`](https://www.npmjs.com/package/capmonster-mcp-patchright)) that does
the page work (navigation, interaction, reading the live DOM/network, and injecting the solved
token back into the page). See [`capmonster_agent/SKILL.md`](capmonster_agent/SKILL.md) for the
full step-by-step procedure for analyzing a captcha-protected page and solving it this way.

**[👉 Get your Free API Key and Start Bypassing CAPTCHAs](https://dash.capmonster.cloud/Account/SignUp?utm_source=github&utm_medium=referral&utm_campaign=mcp_repo_readme)**

---

## ⚡ Supported CAPTCHAs

Your AI Agent will be able to automatically bypass, among others:
- **reCAPTCHA** (v2, v2 Enterprise, v3)
- **Cloudflare Turnstile** and Cloudflare Challenge (managed challenge / `cf_clearance`)
- **FunCaptcha** (Arkose)
- **GeeTest** (v3 and v4)
- **Enterprise Anti-Bot Systems:** AWS WAF, DataDome, Imperva, TSPD, Binance, Prosopo, Yidun,
  TenDI, Hunt, Altcha, Basilisk, and more
- **Image-to-Text & Complex Image Tasks**

The authoritative, current list is served live from CapMonster's OpenAPI spec via the
`get_supported_tasks` tool — **hCaptcha is not currently supported**, despite appearing in some
of CapMonster's own marketing copy.

## 📦 Installation

Requires Python 3.11+ and a valid CapMonster API Key. Run it with `uvx` (no local clone needed):

```
uvx capmonster-mcp
```

Prefer TypeScript/Node? See [`ts/README.md`](ts/README.md) for the npm-published port — same
tools, same behavior.

## 🔌 Using with an MCP client (e.g. Claude Desktop)

Add the following to your MCP client's config (e.g. `claude_desktop_config.json`):

```json
{
  "mcpServers": {
    "capmonster": {
      "command": "uvx",
      "args": ["capmonster-mcp"],
      "env": {
        "CM_API_KEY": "your_api_key_here"
      }
    }
  }
}
```

The server only runs over stdio, so there are no HTTP headers to carry a per-request key —
`CM_API_KEY` is read once from the environment and shared by every tool call in the session.

Pair it with a browser-automation MCP server (e.g.
[`capmonster-mcp-patchright`](https://www.npmjs.com/package/capmonster-mcp-patchright)) so your
agent can both see the page and solve what's on it — see [`mcp.example.json`](mcp.example.json)
for a config with both servers wired up together.

## 🛠 Available MCP Tools

Once connected, your LLM will have access to the following tools:

- `get_supported_tasks`: Lists captcha task types CapMonster supports, from the live OpenAPI spec.
- `get_task_parameters(task_type)`: Required/optional fields, variant notes, and the solution
  schema for a task type.
- `get_docs(url, offset, limit, section)`: Fetches a CapMonster documentation page
  (`docs.capmonster.cloud` / `api.capmonster.cloud` only), with section-jump and pagination.
- `create_task(task)`: Submits a captcha task and returns a `taskId`.
- `get_task_result(task_id)`: Polls a task once.
- `get_task_result_wait(task_id, timeout_seconds, poll_interval_seconds)`: Polls a task to
  completion (preferred over driving the poll loop yourself).
- `get_actual_user_agent()`: Fetches a current Windows User-Agent to use as one consistent
  fingerprint across the browser and the solve task.
- `get_balance()`: Checks your current CapMonster Cloud API balance.

## 📚 Official Documentation

- [CapMonster Cloud Main Documentation](https://docs.capmonster.cloud/)
- [Model Context Protocol (MCP) Docs](https://modelcontextprotocol.io/)

## 📄 License
[MIT](LICENSE)