FastDomainCheck

FastDomainCheck MCP Server

A Model Context Protocol implementation for checking domain name registration status in bulk.

Introduction

FastDomainCheck MCP Server is a Model Context Protocol (MCP) server implementation that enables secure, two-way connections between AI tools (like Claude) and domain availability data. By following the open MCP standard, it ensures seamless compatibility with various AI-powered applications.

Features

Bulk domain registration status checking

Dual verification using WHOIS and DNS

Support for IDN (Internationalized Domain Names)

Concise output format

Built-in input validation and error handling

Tool Documentation

check_domains

Check registration status for multiple domain names.

Input Format

Parameters:

`domains`: Array of strings containing domain names to check - Maximum length of 255 characters per domain - Maximum 50 domains per request - No empty domain names allowed

Output Format

Response Fields:

`results`: Object with domain names as keys and check results as values - `registered`: Boolean - `true`: Domain is registered - `false`: Domain is available

Error Handling

The tool will return an error in the following cases:

Empty domains list

More than 50 domains in request

Empty domain name

Domain name exceeding 255 characters

Result serialization failure

Error Response Format:

Usage Examples

Check multiple domains:

Request

Response

Performance Considerations

Domain checks are executed sequentially, taking approximately 0.3-1 second per domain

Maximum 50 domains per request to prevent resource exhaustion

WHOIS query timeout set to 10 seconds

DNS query fallback when WHOIS query fails

Error Handling Strategy

Input Validation: Comprehensive validation before processing

Dual Verification: WHOIS primary, DNS fallback

Timeout Management: Reasonable timeouts for all network operations

Detailed Error Messages: Clear error descriptions for troubleshooting

Usage

Download Binary

Download the binary file from the release page. https://github.com/bingal/FastDomainCheck-MCP-Server/releases

For Mac/Linux

MCP Server Settings

Configuring FastDomainCheck MCP in Claude Deskto

Modify your claude-desktop-config.json file as shown below

Mac/Linux

Windows

Development Guide

Requirements

Go 1.16 or higher

Network connectivity (for WHOIS and DNS queries)

Dependencies: - github.com/metoro-io/mcp-golang - Other project-specific dependencies