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LazyApp is WhatsApp-only. Everything in these docs — sends, webhooks, templates, platform customers — sits on Meta’s WhatsApp Cloud API. You connect a WhatsApp Business Account (WABA) and phone number once; LazyApp holds credentials and gives you a stable REST surface. Most teams start with quickstart, then read connecting WhatsApp when they need console or platform onboarding.

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Quick reference

Do not hard-code calling, block lists, or India payments. Ask capabilities per connection — Meta can flip flags without a deploy on your side.

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Before you start

WhatsApp requires a WhatsApp Business Account (WABA), not a personal WhatsApp account.You need:
  • A Meta Business Portfolio (business.facebook.com)
  • A WABA (created during Embedded Signup)
  • At least one phone number on that WABA
  • Approved templates to start business-initiated conversations
  • Awareness of the 24-hour rule — free-form replies only within 24 hours of the contact’s last message; outside that window you must use an approved template
New numbers often start in Meta’s sandbox tier (TIER_250 — about 250 unique contacts per 24 hours). The limit rises automatically as messaging history and quality improve. Watch messaging_limit_tier and quality_rating on capabilities and the phone_number.quality_changed webhook.

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In this section

Sandbox

Test mode, claim a pool number, test recipients, webhook simulation

Connecting WhatsApp

Console Embedded Signup, platform setup links, coexistence, reconnect

Messages

Every send type, the 24-hour window, scheduling

Calling

Permission requests, call webhooks, and history — not a PSTN/SIP bridge.

Phone numbers

Connect your own number, monitor quality and limits, recover from disconnects.

Contacts & profile

Upsert contacts, record consent, business profile via Meta proxy.

Inbox

List conversations, fetch messages, reply with POST /v1/messages.

Group chats

Create groups and send with group_id — capability-gated; no participant APIs yet.

Templates

Create, submit for Meta review, sync status

Media

Upload, retention, Meta’s ~30-day expiry

Broadcasts

Template sends to a segment with quiet hours

Flows

Create, publish, send interactive forms — and collect submissions

Verify

OTP send and check with fraud controls

Webhooks

Signed delivery, retries, event catalogue

Capabilities

What each connected number supports today

Media & limits

Upload caps, tiers, analytics, and common Meta error codes

Build a platform

One workspace per customer, setup links, scoped keys

WhatsApp rates

Meta’s rates, billed to you by Meta. LazyApp adds 0%

Migrate from Kapso

Keep Meta-shaped sends on the proxy, move webhooks and setup links

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What we skip (Zernio-style)