---
name: integrate-whatsapp
description: "Connect WhatsApp to your product with Kapso: onboard customers with setup links, detect connections, receive events via webhooks, and send messages/templates/media. Also manage WhatsApp Flows (create/update/publish, data endpoints, encryption). Use when integrating WhatsApp end-to-end."
---

# Integrate WhatsApp

## Setup

Env vars:
- `KAPSO_API_BASE_URL` (host only, no `/platform/v1`)
- `KAPSO_API_KEY`
- `META_GRAPH_VERSION` (optional, default `v24.0`)

Auth header (direct API calls):
```
X-API-Key: <api_key>
```

Install deps (once):
```bash
npm i
```

## Connect WhatsApp (setup links)

Typical onboarding flow:

1. Create customer: `POST /platform/v1/customers`
2. Generate setup link: `POST /platform/v1/customers/:id/setup_links`
3. Customer completes embedded signup
4. Use `phone_number_id` to send messages and configure webhooks

Detect connection:
- Project webhook `whatsapp.phone_number.created` (recommended)
- Success redirect URL query params (use for frontend UX)

Provision phone numbers (setup link config):
```json
{
  "setup_link": {
    "provision_phone_number": true,
    "phone_number_country_isos": ["US"]
  }
}
```

Notes:
- Platform API base: `/platform/v1`
- Meta proxy base: `/meta/whatsapp/v24.0` (messaging, templates, media)
- Use `phone_number_id` as the primary WhatsApp identifier

## Receive events (webhooks)

Use webhooks to receive:
- Project events (connection lifecycle, workflow events)
- Phone-number events (messages, conversations, delivery status)

Create a webhook:
- Project-level: `node scripts/create.js --scope project --url <https://...> --events <csv>`
- Phone-number: `node scripts/create.js --phone-number-id <id> --url <https://...> --events <csv>`

Common flags for create/update:
- `--url <https://...>` - webhook destination
- `--events <csv|json-array>` - event types (Kapso webhooks)
- `--kind <kapso|meta>` - Kapso (event-based) vs raw Meta forwarding
- `--payload-version <v1|v2>` - payload format (`v2` recommended)
- `--buffer-enabled <true|false>` - enable buffering for `whatsapp.message.received`
- `--buffer-window-seconds <n>` - 1-60 seconds
- `--max-buffer-size <n>` - 1-100
- `--active <true|false>` - enable/disable

Test delivery:
```bash
node scripts/test.js --webhook-id <id>
```

Always verify signatures. See:
- `references/webhooks-overview.md`
- `references/webhooks-reference.md`

## Send and read messages

### Discover IDs first

Two Meta IDs are needed for different operations:

| ID | Used for | How to discover |
|----|----------|-----------------|
| `business_account_id` (WABA) | Template CRUD | `node scripts/list-platform-phone-numbers.mjs` |
| `phone_number_id` | Sending messages, media upload | `node scripts/list-platform-phone-numbers.mjs` |

### SDK setup

Install:
```bash
npm install @kapso/whatsapp-cloud-api
```

Create client:
```ts
import { WhatsAppClient } from "@kapso/whatsapp-cloud-api";

const client = new WhatsAppClient({
  baseUrl: "https://api.kapso.ai/meta/whatsapp",
  kapsoApiKey: process.env.KAPSO_API_KEY!
});
```

### Send a text message

Via SDK:
```ts
await client.messages.sendText({
  phoneNumberId: "<PHONE_NUMBER_ID>",
  to: "+15551234567",
  body: "Hello from Kapso"
});
```

### Send a template message

1. Discover IDs: `node scripts/list-platform-phone-numbers.mjs`
2. Draft template payload from `assets/template-utility-order-status-update.json`
3. Create: `node scripts/create-template.mjs --business-account-id <WABA_ID> --file <payload.json>`
4. Check status: `node scripts/template-status.mjs --business-account-id <WABA_ID> --name <name>`
5. Send: `node scripts/send-template.mjs --phone-number-id <ID> --file <send-payload.json>`

### Send an interactive message

Interactive messages require an active 24-hour session window. For outbound notifications outside the window, use templates.

1. Discover `phone_number_id`
2. Pick payload from `assets/send-interactive-*.json`
3. Send: `node scripts/send-interactive.mjs --phone-number-id <ID> --file <payload.json>`

### Read inbox data

Use Meta proxy or SDK:
- Proxy: `GET /{phone_number_id}/messages`, `GET /{phone_number_id}/conversations`
- SDK: `client.messages.query()`, `client.conversations.list()`

### Template rules

Creation:
- Use `parameter_format: "NAMED"` with `{{param_name}}` (preferred over positional)
- Include examples when using variables in HEADER/BODY
- Use `language` (not `language_code`)
- Don't interleave QUICK_REPLY with URL/PHONE_NUMBER buttons
- URL button variables must be at the end of the URL and use positional `{{1}}`

Send-time:
- For NAMED templates, include `parameter_name` in header/body params
- URL buttons need a `button` component with `sub_type: "url"` and `index`
- Media headers use either `id` or `link` (never both)

## WhatsApp Flows

Use Flows to build native WhatsApp forms. Read `references/whatsapp-flows-spec.md` before editing Flow JSON.

### Create and publish a flow

1. Create flow: `node scripts/create-flow.js --phone-number-id <id> --name <name>`
2. Update JSON: `node scripts/update-flow-json.js --flow-id <id> --json-file <path>`
3. Publish: `node scripts/publish-flow.js --flow-id <id>`
4. Test: `node scripts/send-test-flow.js --phone-number-id <id> --flow-id <id> --to <phone>`

### Attach a data endpoint (dynamic flows)

1. Set up encryption: `node scripts/setup-encryption.js --flow-id <id>`
2. Create endpoint: `node scripts/set-data-endpoint.js --flow-id <id> --code-file <path>`
3. Deploy: `node scripts/deploy-data-endpoint.js --flow-id <id>`
4. Register: `node scripts/register-data-endpoint.js --flow-id <id>`

### Flow JSON rules

Static flows (no data endpoint):
- Use `version: "7.3"`
- `routing_model` and `data_api_version` are optional
- See `assets/sample-flow.json`

Dynamic flows (with data endpoint):
- Use `version: "7.3"` with `data_api_version: "3.0"`
- `routing_model` is required (defines valid screen transitions)
- See `assets/dynamic-flow.json`

### Data endpoint rules

Handler signature:
```js
async function handler(request, env) {
  const body = await request.json();
  // body.data_exchange.action: INIT | data_exchange | BACK
  // body.data_exchange.screen: current screen id
  // body.data_exchange.data: user inputs
  return Response.json({
    version: "3.0",
    screen: "NEXT_SCREEN_ID",
    data: { }
  });
}
```

- Do not use `export` or `module.exports`
- Completion uses `screen: "SUCCESS"` with `extension_message_response.params`
- Do not include `endpoint_uri` or `data_channel_uri` (Kapso injects these)

### Troubleshooting

- Preview shows `"flow_token is missing"`: flow is dynamic without a data endpoint. Attach one and refresh.
- Encryption setup errors: enable encryption in Settings for the phone number/WABA.
- OAuthException 139000 (Integrity): WABA must be verified in Meta security center.

## Scripts

### Webhooks

| Script | Purpose |
|--------|---------|
| `list.js` | List webhooks |
| `get.js` | Get webhook details |
| `create.js` | Create a webhook |
| `update.js` | Update a webhook |
| `delete.js` | Delete a webhook |
| `test.js` | Send a test event |

### Messaging and templates

| Script | Purpose | Required ID |
|--------|---------|-------------|
| `list-platform-phone-numbers.mjs` | Discover business_account_id + phone_number_id | — |
| `list-connected-numbers.mjs` | List WABA phone numbers | business_account_id |
| `list-templates.mjs` | List templates (with filters) | business_account_id |
| `template-status.mjs` | Check single template status | business_account_id |
| `create-template.mjs` | Create a template | business_account_id |
| `update-template.mjs` | Update existing template | business_account_id |
| `send-template.mjs` | Send template message | phone_number_id |
| `send-interactive.mjs` | Send interactive message | phone_number_id |
| `upload-media.mjs` | Upload media for send-time headers | phone_number_id |

### Flows

| Script | Purpose |
|--------|---------|
| `list-flows.js` | List all flows |
| `create-flow.js` | Create a new flow |
| `get-flow.js` | Get flow details |
| `read-flow-json.js` | Read flow JSON |
| `update-flow-json.js` | Update flow JSON (creates new version) |
| `publish-flow.js` | Publish a flow |
| `get-data-endpoint.js` | Get data endpoint config |
| `set-data-endpoint.js` | Create/update data endpoint code |
| `deploy-data-endpoint.js` | Deploy data endpoint |
| `register-data-endpoint.js` | Register data endpoint with Meta |
| `get-encryption-status.js` | Check encryption status |
| `setup-encryption.js` | Set up flow encryption |
| `send-test-flow.js` | Send a test flow message |
| `delete-flow.js` | Delete a flow |
| `list-flow-responses.js` | List stored flow responses |
| `list-function-logs.js` | List function logs |
| `list-function-invocations.js` | List function invocations |

### OpenAPI

| Script | Purpose |
|--------|---------|
| `openapi-explore.mjs` | Explore OpenAPI (search/op/schema/where) |

Examples:
```bash
node scripts/openapi-explore.mjs --spec whatsapp search "template"
node scripts/openapi-explore.mjs --spec whatsapp op sendMessage
node scripts/openapi-explore.mjs --spec whatsapp schema TemplateMessage
node scripts/openapi-explore.mjs --spec platform ops --tag "WhatsApp Flows"
node scripts/openapi-explore.mjs --spec platform op setupWhatsappFlowEncryption
node scripts/openapi-explore.mjs --spec platform search "setup link"
```

## Assets

| File | Description |
|------|-------------|
| `template-utility-order-status-update.json` | UTILITY template with named params + URL button |
| `send-template-order-status-update.json` | Send-time payload for order_status_update |
| `template-utility-named.json` | UTILITY template showing button ordering rules |
| `template-marketing-media-header.json` | MARKETING template with IMAGE header |
| `template-authentication-otp.json` | AUTHENTICATION OTP template (COPY_CODE) |
| `send-interactive-buttons.json` | Interactive button message |
| `send-interactive-list.json` | Interactive list message |
| `send-interactive-cta-url.json` | Interactive CTA URL message |
| `send-interactive-location-request.json` | Location request message |
| `send-interactive-catalog-message.json` | Catalog message |
| `sample-flow.json` | Static flow example (no endpoint) |
| `dynamic-flow.json` | Dynamic flow example (with endpoint) |
| `webhooks-example.json` | Webhook create/update payload example |

## References

- [references/getting-started.md](references/getting-started.md) - Platform onboarding
- [references/platform-api-reference.md](references/platform-api-reference.md) - Full endpoint reference
- [references/setup-links.md](references/setup-links.md) - Setup link configuration
- [references/detecting-whatsapp-connection.md](references/detecting-whatsapp-connection.md) - Connection detection methods
- [references/webhooks-overview.md](references/webhooks-overview.md) - Webhook types, signature verification, retries
- [references/webhooks-event-types.md](references/webhooks-event-types.md) - Available events
- [references/webhooks-reference.md](references/webhooks-reference.md) - Webhook API and payload notes
- [references/templates-reference.md](references/templates-reference.md) - Template creation rules, components cheat sheet, send-time components
- [references/whatsapp-api-reference.md](references/whatsapp-api-reference.md) - Meta proxy payloads for messages and conversations
- [references/whatsapp-cloud-api-js.md](references/whatsapp-cloud-api-js.md) - SDK usage for sending and reading messages
- [references/whatsapp-flows-spec.md](references/whatsapp-flows-spec.md) - Flow JSON spec

## Related skills

- `automate-whatsapp` - Workflows, agents, and automations
- `observe-whatsapp` - Debugging, logs, health checks

<!-- FILEMAP:BEGIN -->
```text
[integrate-whatsapp file map]|root: .
|.:{package.json,SKILL.md}
|assets:{dynamic-flow.json,sample-flow.json,send-interactive-buttons.json,send-interactive-catalog-message.json,send-interactive-cta-url.json,send-interactive-list.json,send-interactive-location-request.json,send-template-order-status-update.json,template-authentication-otp.json,template-marketing-media-header.json,template-utility-named.json,template-utility-order-status-update.json,webhooks-example.json}
|references:{detecting-whatsapp-connection.md,getting-started.md,platform-api-reference.md,setup-links.md,templates-reference.md,webhooks-event-types.md,webhooks-overview.md,webhooks-reference.md,whatsapp-api-reference.md,whatsapp-cloud-api-js.md,whatsapp-flows-spec.md}
|scripts:{create-flow.js,create-function.js,create-template.mjs,create.js,delete-flow.js,delete.js,deploy-data-endpoint.js,deploy-function.js,get-data-endpoint.js,get-encryption-status.js,get-flow.js,get-function.js,get.js,list-connected-numbers.mjs,list-flow-responses.js,list-flows.js,list-function-invocations.js,list-function-logs.js,list-platform-phone-numbers.mjs,list-templates.mjs,list.js,openapi-explore.mjs,publish-flow.js,read-flow-json.js,register-data-endpoint.js,send-interactive.mjs,send-template.mjs,send-test-flow.js,set-data-endpoint.js,setup-encryption.js,submit-template.mjs,template-status.mjs,test.js,update-flow-json.js,update-function.js,update-template.mjs,update.js,upload-media.mjs,upload-template-header-handle.mjs}
|scripts/lib:{args.mjs,cli.js,env.js,env.mjs,http.js,output.js,output.mjs,request.mjs,run.js,whatsapp-flow.js}
|scripts/lib/webhooks:{args.js,kapso-api.js,webhook.js}
```
<!-- FILEMAP:END -->