In the DeepSeek Harness (DSH) plugin ecosystem, handling external network requests or data validation is a common need. Developers often need to bulk-check whether domains are already registered in order to plan subsequent projects or secure resources ahead of time. This article introduces xby-fastdomaincheck, a domain registration status check server based on Python and the MCP protocol.

Plugin Positioning

This is a networking tool plugin maintained by xby-skill. It runs as an MCP server, providing domain registration status lookup, bulk checking, and multi-dimensional validation.

Core Features

The plugin mainly provides the following features:

  1. API key management: Supports setting an API key in chat conversations. The system automatically persists the key, so it remains valid after restart.
  2. Bulk domain check: Provides a check_domains method that accepts a list of domains and returns a JSON object containing registration status.

Installation and Enablement

Use the following official command to install the plugin from GitHub:

dsh plugin --profile web add github:xby_skill/xby-fastdomaincheck

Typical Usage

Call the check_domains function with a list of domains. For example, input ["example.com", "test.com"], and the returned result is as follows:

{
  "results": {
    "example.com": {
      "registered": true
    },
    "test.com": {
      "registered": false
    }
  }
}

Applicable Scenarios and Notes

Before use, you need to go to Xiaobenyang Official Website to register and obtain an API key. The plugin runs with the permissions of the current dsh process. Before installing, it is recommended to review the source code and license (MIT).

Summary

This tool integrates domain lookup capability into DSH through the MCP protocol, making it suitable for scenarios that frequently require domain availability verification in agent development. For more details, see GitHub.