@captchala/mcp

A Model Context Protocol (MCP) server for CaptchaLa. It lets MCP clients such as Claude Desktop, Cursor, and others search the CaptchaLa documentation and validate or issue CaptchaLa tokens directly from your assistant.

The server speaks MCP over stdio transport.

Tools

Tool	Description	Credentials
search_captchala_docs	Search the CaptchaLa docs and return the most relevant sections for a query.	Not required
get_captchala_doc	Fetch a specific documentation page by path (e.g. getting-started).	Not required
validate_captcha_token	Validate a pass token against the CaptchaLa API.	App Key + Secret
issue_server_token	Issue a server-side challenge token for an action.	App Key + Secret

The documentation tools work without any credentials. The validate_captcha_token and issue_server_token tools require a CaptchaLa App Key and App Secret, supplied either per call (as tool arguments) or via the CAPTCHALA_APP_KEY and CAPTCHALA_APP_SECRET environment variables.

Install

Install globally:

npm install -g @captchala/mcp

Or run on demand with npx:

npx @captchala/mcp

Claude Desktop configuration

Add the server to your claude_desktop_config.json:

{
  "mcpServers": {
    "captchala": {
      "command": "npx",
      "args": ["-y", "@captchala/mcp"],
      "env": {
        "CAPTCHALA_APP_KEY": "your-app-key",
        "CAPTCHALA_APP_SECRET": "your-app-secret"
      }
    }
  }
}

If you only need the documentation tools, you can omit the env block.

Cursor

Cursor supports MCP servers as well. Add the same command/args/env entry under Cursor's MCP settings (Settings → MCP → Add server). The stdio transport is used automatically.

Example prompts

• "Search the CaptchaLa docs for how server-side validation works."
• "Fetch the CaptchaLa getting-started doc."
• "Validate this CaptchaLa pass token: <token> for client IP 1.2.3.4."
• "Issue a CaptchaLa server token for the login action."

Environment variables

Variable	Purpose
CAPTCHALA_APP_KEY	Your CaptchaLa App Key (sent as X-App-Key).
CAPTCHALA_APP_SECRET	Your CaptchaLa App Secret (sent as X-App-Secret).

License

MIT © CaptchaLa <supply@captcha.la>