WhatsApp Business API Integration in Chennai on Meta Cloud API

1. Templates get rejected for the wrong category

The most common issue is submitting an Authentication or Utility template with promotional wording, or missing the required variable-placeholder formatting. Meta rejects it outright, or worse, approves it and then restricts your account later for miscategorised sending. I write templates to match Meta's category rules precisely before submission.

2. Webhook verification silently fails

Meta requires your server to correctly echo back a challenge value during webhook setup, and to keep responding within its timeout window on every subsequent event. A slow database call inside the webhook handler, or a missing signature check, causes delivery and status events to stop arriving without an obvious error anywhere in your app.

3. Messaging tier limits get hit without warning

New WhatsApp Business Accounts start on a capped daily messaging tier. Businesses that scale a campaign or notification volume quickly, without pacing sends or completing Meta Business verification, hit that ceiling and messages start silently failing. I structure sending through a queue with rate limiting built in, so growth doesn't outrun your tier.

4. The 24-hour customer service window gets misunderstood

You can only send free-form messages within 24 hours of a customer's last message; outside that window, only an approved template goes through. Integrations that don't track this window correctly end up dropping messages, or paying for template sends they didn't need to. I track window state server-side so the right message type goes out automatically.

Note: These are typical ranges, not quotes. You'll get an exact estimate after a free review of your Meta Business Account status, existing systems, and template needs.

Permanent access tokens. I generate long-lived tokens through a System User in Meta Business Settings, so your server's API calls stay authorised without needing to refresh short-lived tokens every 24 hours.

Webhook verification & signature checks. Every incoming webhook is verified against Meta's signature before your app trusts it, and the handshake challenge is echoed back correctly during setup so delivery and status events keep arriving.

Template categories. Marketing, Utility, and Authentication templates each follow different approval rules and pricing. I match the message content to the correct category upfront to avoid rejections or account restrictions later.

The 24-hour session window. Free-form replies are only allowed within 24 hours of the customer's last message. I track this state server-side so your system automatically falls back to an approved template outside that window.

Messaging tiers & quality rating. Your account's daily messaging limit grows as message quality and volume stay healthy. I structure sends through a queue with rate limiting, so growth doesn't outrun your current tier.

Being based in Chennai, Tamil Nadu means we work in the same hours. When a webhook stops firing during your morning order rush, you get a reply in minutes — not a response from an outsourced queue the next day.

I work with businesses across Anna Nagar, Velachery, Adyar, Guindy, Ambattur, Porur, and OMR, and I'm familiar with the Indian payment gateways and delivery services most Chennai businesses actually connect to their WhatsApp notifications.

I'm also available across Tambaram, Avadi, Chromepet, Perambur, KK Nagar, Ashok Nagar, Sholinganallur, and Medavakkam — and remotely for businesses in the Middle East, Europe, and the US, entirely over WhatsApp and email.