India WhatsApp Bulk Messaging API

I need access to a reliable WhatsApp API account that can legally operate from India and let me push out large-scale marketing campaigns. Each blast will combine short promotional text with an attached video, so the solution must fully support media messages without compression issues or delays.

My workflow is simple: I will manually paste or type each recipient number before sending, so I’m not looking for CRM integrations right now—just a clean interface or endpoint where numbers can be entered in batches and dispatched immediately.

Key expectations:
• API or panel must originate in India and comply with WhatsApp policies.
• Unlimited or high-volume throughput suitable for periodic campaign bursts.
• Successful delivery reporting, basic analytics (delivered / failed), and an opt-out mechanism.
• Clear instructions for authentication, message formatting, and media upload limits.

Please outline how quickly you can provision the account, any daily sending caps, and the steps I’ll follow to get up and running. If you have a live demo or screenshots, that will speed up my decision.