WhatsApp API Reference & Limits
A reference guide for Meta WhatsApp Business API integration details, messaging capabilities, and daily limits.
Official API
Meta WhatsApp Business
Professional cloud-hosted communication solution for high-volume customer broadcasting.
Bulk Campaigns Supported
Requires Template Approval
Supports Interactive Buttons
Supports Media Attachments
Real-time Webhook Logging
Authentication
Bearer Token
Endpoint
https://graph.facebook.com
Technical Integration Details
| Technical Field | Specification / Value |
|---|---|
| Platform | Meta WhatsApp Cloud API |
| Sender ID Model | Phone Number ID |
| Business Account Hub | WhatsApp Business Account (WABA) |
| Template Approval | Required (pre-screened by Meta) |
| Webhooks Eventing | Supported (delivered status, read status, errors) |
| Supported Media Types | Images, Videos, PDFs, Audio, Documents |
| Interactive Formats | Quick-reply Buttons, Lists, Call-To-Action (CTA) Buttons, Catalogs |
| Message State Tracking | Sent, Delivered, Read, Failed |
Meta Messaging Tiers & Scaling Limits
Limits dictate the number of new conversations your business can initiate in a rolling 24-hour period.
| Messaging Tier | Maximum Initiated Conversations (24 Hours) | Verification / Scaling Status |
|---|---|---|
| Unverified / New Business | 250 conversations | Starting state for unverified accounts. |
| Tier 1 | 1,000 conversations | Requires business verification to initiate scaling. |
| Tier 2 | 10,000 conversations | Automatic upgrade when message sending thresholds are met. |
| Tier 3 | 100,000 conversations | Consistently sending quality messages scaling up from Tier 2. |
| Tier 4 | Unlimited conversations | Maximum capacity limit status tier. |
How Meta Increases Your Limits
Meta automatically upgrades your business account to the next messaging limit tier when:
- Your Business verification status is completed.
- Your phone number rating is "Good" quality.
- You reach 50% or more of your current tier's messaging limit with verified recipients within a rolling 7-day period.