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Subdomain API

app.subdomain/subdomains · api.subdomain.app · MCP, Website

Find known subdomains of a domain. Passive data; may include historic entries. List or count.
Name and description as published by MCP Registry

Live

Last successful check: 25 Oct 2026, 20:40 UTC.

answered, last 24 hours
100%
answered, last 30 days
100%

At api.subdomain.app, its best endpoint.

How addrbook checks →

Connect

https://api.subdomain.app/mcphttps://subdomain.app/

MCP: addrbook sends an initialize and a tools/list. It never calls a tool. Website: addrbook loads the page.

Who's behind it

Listed by
  • MCP Registryapp.subdomain/subdomainslast seen UTC
Wallets named
None in its listings
Listed since

Checks by endpoint

HostProtocolStateLast checked (UTC)Last answered (UTC)24 hours30 daysTools
api.subdomain.appMCPLive100%100%2
subdomain.appWebsiteLive100%100%—