FastDomainCheck

FastDomainCheck MCP Server provides a bulk domain availability checker that adheres to the MCP (Model Context Protocol) standard. It exposes a tool-checking capability called check_domains, which accepts a list of domain names and returns per-domain registration status. The server supports WHOIS-based verification with a DNS fallback and can handle Internationalized Domain Names (IDNs). Use it to verify large lists of domains efficiently, with clear result formatting indicating whether each domain is registered. The tool is designed to return a concise JSON payload that maps each domain to a registered flag, making it suitable for integration with AI assistants or automation pipelines in workflows that require domain availability data. To operate, start the MCP server binary and send requests following the expected input format described in the tool documentation.

Prerequisites:

• Go 1.16 or higher (for building from source, if you prefer to compile locally)
• A suitable environment with network access for WHOIS and DNS queries

Option A: Use prebuilt binary

1. Download the FastDomainCheck-MCP-Server binary for your OS from the project releases page.
2. Make the binary executable (on Unix-like systems): chmod +x FastDomainCheck-MCP-Server
3. Run the server: ./FastDomainCheck-MCP-Server

Option B: Build from source (Go)

1. Install Go (1.16+).
2. Clone the repository: git clone https://github.com/bingal/FastDomainCheck-MCP-Server.git
3. Build the binary: cd FastDomainCheck-MCP-Server go build -o FastDomainCheck-MCP-Server
4. Run the binary: ./FastDomainCheck-MCP-Server

Note: If you plan to run in Docker or another container environment, you can containerize the binary using a simple Dockerfile and pass necessary environment variables as needed.

Tips and considerations:

• If you encounter domain name errors, ensure you validate inputs to avoid empty strings or domains exceeding 255 characters.
• The tool performs WHOIS lookups first and falls back to DNS checks if needed. Expect a per-domain latency of roughly 0.3–1 second depending on network conditions.
• The maximum number of domains per request is 50 to prevent resource saturation. Implement input batching if you need to process larger lists.
• You can configure timeouts for WHOIS and DNS queries to balance speed and reliability in your environment.
• If you’re integrating with Claude or other tools, map the MCP response structure directly to the tool’s expected schema for smooth parsing.