Roblox Open Cloud and HttpService Base URL: . Prefer Open Cloud endpoints (API key or OAuth 2.0, stable). Legacy cookie-authenticated web APIs can break without notice — don't build on them. Authentication - API keys (Creator Dashboard → Open Cloud → API Keys): for your own/your group's resources and automation. Grant the minimum scopes per universe, set an IP allowlist (CIDR) and expiration , store as a secret (CI secret, vault), send as header . Group-owned resources need a key created under the group. Introspect a key with . - OAuth 2.0 (authorization code + PKCE): apps acting on behalf of…