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WhatsApp API documentation

A REST API to send and receive WhatsApp messages through managed instances. Authenticate, make your first send and connect webhooks. Full interactive reference in the dashboard.

Authentication

Every request uses two headers, available in the dashboard under Settings and API:

  • x-api-key your API key
  • x-api-secret your API secret

Base URL

https://api.zapzapapi.com/api/v1/{instanceId}

Replace {instanceId} with the instance ID (shown in the dashboard). Account and instance management endpoints use /api/v1/instances / /api/v1/account.

First send

After connecting a number with a QR code in the dashboard, send a text message:

POST /send/text

curl -X POST https://api.zapzapapi.com/api/v1/{instanceId}/send/text \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "x-api-secret: YOUR_API_SECRET" \
  -d '{"number":"5511999999999","text":"Hello!"}'

Humanized sending by default

Every send shows the automatic typing indicator before delivering, for a duration proportional to the text, which lowers the risk of a ban. The response is still synchronous. To turn it off for a request, send "digitando": false.

Guides

Authentication

Keys, base URL and your first call.

View

Send a message

Text, media and buttons through the API.

View

Webhooks

Receive messages and events in real time.

View

What you can do

The API covers more than 140 endpoints. Main categories:

Account and InstancesSend MessagesConversationsContacts and ProfileGroupsNewsletters and ChannelsCampaignsCallsWhatsApp BusinessSettingsWebhooks and EventsAsync QueueChatbot and AICRM and LeadsChatwoot IntegrationFlows
WhatsApp API reference by endpoint
Full interactive reference in the dashboard

Get your API keys

Create your account, connect a number in minutes and start sending. R$15 per active number/month, with a welcome credit when you create the account, subject to the current campaign.

Create free accountView the documentation