The "do I need WhatsApp API" question has two answers depending on what you're trying to do.
If you're a developer building a custom system
Yes — you need WhatsApp Business API access through Meta or an authorised BSP (Business Service Provider) like Twilio, Gupshup, or 360Dialog. Steps:
- Submit business verification with Meta.
- Get a phone number registered to the API.
- Submit message templates for approval (24-48 hour turnaround per template).
- Pay per-conversation fees (₹0.30-₹0.80 per message, depending on country and category).
Total time: 1-3 weeks for a fully approved sender.
If you're a clinic that wants to send patient reminders
Skip all of the above. Use a clinic management tool with WhatsApp built in. The tool handles:
- API approval (already done at the platform level).
- Pre-approved templates for clinic use cases (reminders, follow-ups, prescriptions).
- Sender reputation management.
- Per-message billing wrapped into a flat monthly cost.
Time to first reminder sent: ~10 minutes.
What you can NOT do without API
- Send bulk marketing blasts to non-opted-in patients.
- Use WhatsApp Web automation tools — these violate Meta's terms and risk number bans.
- Send messages outside the 24-hour customer service window without an approved template.
Vaidya OS includes WhatsApp reminders, follow-ups, and prescription sharing at ₹999/month flat — no per-message charges.