Subdomain API
Find known subdomains of a domain. Passive data; may include historic entries. List or count.
likely compatible
Answered an MCP initialize with no credentials; use auth 'None'.
Rule R2a · what this means · Not tested in Copilot Studio.
| Registry name | app.subdomain/subdomains |
| Endpoint used for verdict | https://api.subdomain.app/mcp |
| Transports | streamable-http |
| Auth (Copilot Studio setting) | None (open) |
| Last endpoint check | 2026-10-20T18:10:12Z · initialize OK |
| Website | https://subdomain.app |
| Version | 1.0.1 |
| Registry updated | 2026-06-26 |
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Is this wrong or out of date? Email us. Data built 2026-10-20.