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Subdomain API

Official registry Other

Find known subdomains of a domain. Passive data; may include historic entries. List or count.

Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http subdomain-api 'https://api.subdomain.app/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "subdomain-api": {
            "type": "http",
            "url": "https://api.subdomain.app/mcp"
        }
    }
}

Frequently asked questions

What is Subdomain API?

Find known subdomains of a domain. Passive data; may include historic entries. List or count.

How do I install Subdomain API?

It runs as a remote server. In Claude Code: claude mcp add --transport http subdomain-api 'https://api.subdomain.app/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Subdomain API need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Who maintains Subdomain API?

It is published by app.subdomain. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.