> ## Documentation Index > Fetch the complete documentation index at: https://docs.lazyapp.in/llms.txt > Use this file to discover all available pages before exploring further. # WhatsApp > Send messages, manage templates and contacts, run broadcasts and flows — one API for WhatsApp Cloud. 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](https://docs.lazyapp.in/quickstart.md), then read [connecting WhatsApp](https://docs.lazyapp.in/guides/connecting-whatsapp.md) when they need console or platform onboarding. ## Quick reference | What | LazyApp | | - | - | | Message types | Text, template, image, video, audio, document, sticker, location, contacts, reaction, interactive | | Template required | Yes — outside the [24-hour window](https://docs.lazyapp.in/sending/messages.md#the-24-hour-window) | | Upload limit | **16 MB** per file by default (`MEDIA_MAX_SIZE_KB`). Meta may refuse a type or size WhatsApp does not accept for that message kind | | Scheduling | Yes — `send_at` on [`POST /v1/messages`](https://docs.lazyapp.in/sending/messages#scheduling) | | Broadcasts | Yes — [template campaigns](https://docs.lazyapp.in/sending/broadcasts.md) with segments and caps | | Inbox | Yes — [Inbox guide](https://docs.lazyapp.in/guides/inbox.md), conversations API, and console | | Group chats | Meta-gated — [`GET /v1/capabilities`](https://docs.lazyapp.in/concepts/capabilities); see [Group chats](https://docs.lazyapp.in/guides/groups.md) | | Flows | Yes — [Flows guide](https://docs.lazyapp.in/guides/flows.md). Disabled on [coexistence](https://docs.lazyapp.in/guides/connecting-whatsapp.md#whatsapp-business-app-coexistence) numbers | | Calling | Meta-gated — check [`GET /v1/capabilities`](https://docs.lazyapp.in/concepts/capabilities) | | Analytics API | No dedicated analytics endpoints | Do not hard-code calling, block lists, or India payments. Ask [capabilities](https://docs.lazyapp.in/concepts/capabilities.md) per connection — Meta can flip flags without a deploy on your side. ## Before you start > [!WARNING] > > WhatsApp requires a **WhatsApp Business Account (WABA)**, not a personal WhatsApp account. > > You need: > > * A Meta Business Portfolio ([business.facebook.com](https://business.facebook.com)) > * A WABA (created during Embedded Signup) > * At least one phone number on that WABA > * Approved [templates](https://docs.lazyapp.in/sending/templates.md) 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](https://docs.lazyapp.in/concepts/capabilities.md) and the `phone_number.quality_changed` [webhook](https://docs.lazyapp.in/webhooks/events.md). ## In this section > **[Sandbox](https://docs.lazyapp.in/guides/sandbox.md)** > > Test mode, claim a pool number, test recipients, webhook simulation > **[Connecting WhatsApp](https://docs.lazyapp.in/guides/connecting-whatsapp.md)** > > Console Embedded Signup, platform setup links, coexistence, reconnect > **[Messages](https://docs.lazyapp.in/sending/messages.md)** > > Every send type, the 24-hour window, scheduling > **[Calling](https://docs.lazyapp.in/guides/calling.md)** > > Permission requests, call webhooks, and history — not a PSTN/SIP bridge. > **[Phone numbers](https://docs.lazyapp.in/guides/phone-numbers.md)** > > Connect your own number, monitor quality and limits, recover from disconnects. > **[Contacts & profile](https://docs.lazyapp.in/guides/contacts.md)** > > Upsert contacts, record consent, business profile via Meta proxy. > **[Inbox](https://docs.lazyapp.in/guides/inbox.md)** > > List conversations, fetch messages, reply with POST /v1/messages. > **[Group chats](https://docs.lazyapp.in/guides/groups.md)** > > Create groups and send with group\_id — capability-gated; no participant APIs yet. > **[Templates](https://docs.lazyapp.in/sending/templates.md)** > > Create, submit for Meta review, sync status > **[Media](https://docs.lazyapp.in/sending/media.md)** > > Upload, retention, Meta's \~30-day expiry > **[Broadcasts](https://docs.lazyapp.in/sending/broadcasts.md)** > > Template sends to a segment with quiet hours > **[Flows](https://docs.lazyapp.in/guides/flows.md)** > > Create, publish, send interactive forms — and collect submissions > **[Verify](https://docs.lazyapp.in/sending/verify.md)** > > OTP send and check with fraud controls > **[Webhooks](https://docs.lazyapp.in/webhooks/overview.md)** > > Signed delivery, retries, event catalogue > **[Capabilities](https://docs.lazyapp.in/concepts/capabilities.md)** > > What each connected number supports today > **[Media & limits](https://docs.lazyapp.in/reference/media-and-limits.md)** > > Upload caps, tiers, analytics, and common Meta error codes > **[Build a platform](https://docs.lazyapp.in/platform/overview.md)** > > One workspace per customer, setup links, scoped keys > **[WhatsApp rates](https://docs.lazyapp.in/billing/whatsapp-rates.md)** > > Meta's rates, billed to you by Meta. LazyApp adds 0% > **[Migrate from Kapso](https://docs.lazyapp.in/migrating/from-kapso.md)** > > Keep Meta-shaped sends on the proxy, move webhooks and setup links ## Related endpoints * [`POST /v1/messages`](https://docs.lazyapp.in/api-reference/messages/send-a-message) — send any message type * [`GET /v1/templates`](https://docs.lazyapp.in/api-reference/templates/list-templates) — list and manage templates * [`GET /v1/contacts`](https://docs.lazyapp.in/api-reference/contacts/list-contacts) — contacts in the workspace * [`GET /v1/conversations`](https://docs.lazyapp.in/api-reference/conversations/list-conversations) — conversation threads * [`POST /v1/broadcasts`](https://docs.lazyapp.in/api-reference/broadcasts/create-a-broadcast) — start a broadcast * [`GET /v1/capabilities`](https://docs.lazyapp.in/api-reference/capabilities/list-connection-capabilities) — per-number features and limits * [`POST /v1/platform/setup-links`](https://docs.lazyapp.in/api-reference/platform/create-a-setup-link) — hosted connect for your customers ## What we skip (Zernio-style) | Zernio surface | LazyApp | | - | - | | Buy a phone number via API | Connect your own number through Embedded Signup | | Headless `POST /connect/whatsapp/credentials` | Console onboarding only — no public credentials-paste API | | Conversation-centric inbox create | Recipient-centric [`POST /v1/messages`](https://docs.lazyapp.in/sending/messages) | | Sandbox sessions + reply activation | [Test mode + console sandbox](https://docs.lazyapp.in/guides/sandbox.md) | | Full groups API (participants, join requests) | Partial — create/list/send only; see [Group chats](https://docs.lazyapp.in/guides/groups.md) | | Click-to-WhatsApp conversion API | Not documented | | Multi-network OAuth hub | WhatsApp only | This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.