# CapSolver MCP server

> Enables AI agents to solve various captcha types and detect captchas on web pages via the Model Context Protocol.

- Repository: https://github.com/capsolver-ai/capsolver-mcp
- Page: https://hostedmcp.org/servers/capsolver-ai/capsolver-mcp
- Transport: stdio
- Stars: 4
- License: MIT
- Latest version: 0.1.3

## Install

### Claude Code

```sh
claude mcp add --env 'CAPSOLVER_API_KEY=<YOUR_CAPSOLVER_API_KEY>' capsolver-mcp -- uvx capsolver-mcp
```

### Cursor (`~/.cursor/mcp.json`)

```json
{
  "mcpServers": {
    "capsolver-mcp": {
      "command": "uvx",
      "args": [
        "capsolver-mcp"
      ],
      "env": {
        "CAPSOLVER_API_KEY": "<YOUR_CAPSOLVER_API_KEY>"
      }
    }
  }
}
```

### VS Code (`.vscode/mcp.json`)

```json
{
  "servers": {
    "capsolver-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "capsolver-mcp"
      ],
      "env": {
        "CAPSOLVER_API_KEY": "<YOUR_CAPSOLVER_API_KEY>"
      }
    }
  }
}
```

### VS Code CLI

```sh
code --add-mcp '{"name":"capsolver-mcp","type":"stdio","command":"uvx","args":["capsolver-mcp"],"env":{"CAPSOLVER_API_KEY":"<YOUR_CAPSOLVER_API_KEY>"}}'
```

### Claude Desktop (`claude_desktop_config.json`)

```json
{
  "mcpServers": {
    "capsolver-mcp": {
      "command": "uvx",
      "args": [
        "capsolver-mcp"
      ],
      "env": {
        "CAPSOLVER_API_KEY": "<YOUR_CAPSOLVER_API_KEY>"
      }
    }
  }
}
```

### Codex

```sh
codex mcp add capsolver-mcp --env 'CAPSOLVER_API_KEY=<YOUR_CAPSOLVER_API_KEY>' -- uvx capsolver-mcp
```

### Codex config.toml (`~/.codex/config.toml`)

```toml
[mcp_servers.capsolver-mcp]
command = "uvx"
args = ["capsolver-mcp"]

[mcp_servers.capsolver-mcp.env]
CAPSOLVER_API_KEY = "<YOUR_CAPSOLVER_API_KEY>"
```

### Gemini CLI

```sh
gemini mcp add -s user -e 'CAPSOLVER_API_KEY=<YOUR_CAPSOLVER_API_KEY>' capsolver-mcp uvx -- capsolver-mcp
```

### Gemini settings.json (`~/.gemini/settings.json`)

```json
{
  "mcpServers": {
    "capsolver-mcp": {
      "command": "uvx",
      "args": [
        "capsolver-mcp"
      ],
      "env": {
        "CAPSOLVER_API_KEY": "<YOUR_CAPSOLVER_API_KEY>"
      }
    }
  }
}
```

## Environment variables

| Name | Required | Secret | Description |
|---|---|---|---|
| `CAPSOLVER_API_KEY` | yes | yes | Your CapSolver API key |

## Tools (5)

- `solve_captcha`
- `detect_captchas`
- `solve_on_page`
- `get_balance`
- `get_supported_captchas`

## FAQ

### How do I install the browser-based captcha tools?

You need to install the server with the browser extra and install the Playwright Chromium browser. Use `pip install capsolver-mcp[browser]` and `playwright install chromium`.

### What tools are available in this MCP server?

The server provides tools to solve captchas by type, detect captchas on a page, solve and autofill captchas on a page, check account balance, and list supported captcha types.