WhatsApp Business API: the complete plain-English guide

The WhatsApp Business API (now officially called the WhatsApp Business Platform) is a set of cloud endpoints Meta exposes so that businesses can send and receive WhatsApp messages programmatically. There is no app to download — you access it through a Business Solution Provider that builds the dashboard, automation engine, chatbot, and inbox on top. Every message your business sends goes through Meta's official infrastructure, encrypted end-to-end, with full delivery receipts.

The free WhatsApp Business app runs on one phone, supports a single agent, and caps broadcasts at 256 contacts per list with no automation, no CRM sync, and no analytics. The Business API removes every one of those ceilings: unlimited broadcasts, shared inbox for any number of agents, chatbots, click-to-WhatsApp ads, catalog and payments, webhooks into your CRM, and verified green-tick branding. If you send more than ~100 customer messages a week or have more than one person replying, you need the API.

Meta bills businesses per conversation, not per message. A 'conversation' is a 24-hour window opened either by you (business-initiated) or the customer (user-initiated). Rates vary by country and category (marketing, utility, authentication, service) and Meta updates them roughly twice a year. On top of Meta's conversation fee, your BSP charges a software subscription. LandinChat passes Meta's costs through at-cost so you only pay our flat platform fee — see /pricing for the current breakdown.

Bulk broadcasts to opted-in lists of any size, no-code chatbot flows that handle FAQs and qualify leads 24/7, shared team inbox with assignment and SLAs, message templates approved by Meta for proactive notifications, click-to-WhatsApp ads from Facebook and Instagram, in-chat product catalogs and payments, two-way webhooks into your CRM, segmentation, analytics dashboards, and the green verified tick once you complete Meta business verification.

1) Choose a BSP and sign up. 2) Connect a phone number that is NOT currently active on the WhatsApp app (you'll need to deregister it first if it is). 3) Complete Meta business verification by uploading your business registration documents inside Meta Business Manager. 4) Submit your display name for approval. With LandinChat the whole process takes 10–30 minutes for the setup and 1–3 business days for Meta's verification.

Don't pick a BSP that marks up Meta's conversation pricing — you'll overpay forever. Don't try to use the API for cold outreach to people who never opted in; Meta will rate-limit and eventually ban your number. Don't skip the green-tick application — verified branding measurably improves open and reply rates. And don't underestimate template approval times — submit them early and keep a fallback approved template ready.