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The repository implements the APIs listed in the reference. That does not mean every operation is enabled on the currently deployed host. An HTTP 503 with a policy/provider message is a real gate, not a request to retry aggressively. Shared Verify must follow Meta’s authentication template restrictions; Sendlyy does not add organization branding or a platform footer to authentication content. Notify uses a separate server-attributed Utility template. Do not assume a WhatsApp number is ready because it exists in inventory. Physical custody, ownership verification, Cloud API registration, display-name approval, allocation and business eligibility are distinct checks. Unsolicited inbound messages on shared numbers are not automatically answered or routed to customers. Shared products currently expose outbound delivery metadata only; they do not provide shared inbox conversations or shared AI agents. This documentation site is repository-managed and published through Mintlify. Custom-domain DNS/TLS setup remains separate, and published documentation does not guarantee that the same API version or gated provider service is live. Verify the deployed API version before distributing launch examples. See health and service status for public readiness checks, monitoring scope and incident guidance.