What can I automate with WhatsApp in Sim?

You can send message, send template, send media, send interactive, and send reaction with WhatsApp in Sim, plus 3 more WhatsApp tools listed on this page. Each runs as a tool inside an AI agent, so the agent can combine WhatsApp with any other connected service and apply LLM reasoning between steps.

How do I connect WhatsApp to Sim?

(1) Create a free account at sim.ai. (2) Create an agent in your workspace. (3) Drag a WhatsApp block onto the workflow builder. (4) Paste your WhatsApp API key to authenticate. (5) Pick a tool such as "Send Message", wire up its inputs, and click Run.

Can WhatsApp events start a Sim agent automatically?

Yes. Sim supports 1 trigger for WhatsApp: WhatsApp Webhook. Add a WhatsApp trigger to your agent, and every matching WhatsApp event starts a run with the event data available to the rest of the workflow.

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WhatsApp integration for AI agents

Q: How do I send message with WhatsApp in Sim?

Add a WhatsApp block to your agent and select "Send Message" as the tool. Send a free-form text message through the WhatsApp Cloud API. Only works inside the 24-hour customer service window — use Send Template to start a conversation. Fill in the required fields. Inputs can reference outputs from earlier steps, such as text generated by an AI block or data fetched from another integration.

Send WhatsApp messages

View docs

Last updated October 14, 2026

What Sim agents can do with WhatsApp

Send text, template, media, and interactive messages, react to messages, and mark messages as read through the WhatsApp Cloud API. Free-form messages only reach a recipient within 24 hours of their last message to you — outside that window WhatsApp requires a pre-approved template.

Category: Communication
Authentication: API key
Tools: 8
Triggers: 1
Documentation: WhatsApp docs

How to automate WhatsApp with Sim

Create a free account
Sign up at sim.ai in seconds. No credit card required. Your workspace is ready immediately.
Add a WhatsApp block
Open your workspace, drag a WhatsApp block onto the workflow builder, and paste in your WhatsApp API key.
Configure, connect, and run
Pick the tool you need, wire in an AI agent for reasoning or data transformation, and run. Your WhatsApp automation is live.

WhatsApp triggers

Add a WhatsApp trigger to a Sim agent and it starts a run whenever one of these WhatsApp events occurs.

WhatsApp Webhook

Trigger workflow from WhatsApp incoming messages and message status webhooks

Agent templates

Ready-to-use templates featuring WhatsApp. Click any to build it instantly.

WhatsApp tools

8 WhatsApp tools available to Sim agents.

Send Message

Send a free-form text message through the WhatsApp Cloud API. Only works inside the 24-hour customer service window — use Send Template to start a conversation.

Send Template

Send a pre-approved WhatsApp template message. Required to start a conversation or to message a user outside the 24-hour customer service window.

Send Media

Send an image, document, video, audio, or sticker message. Accepts an uploaded file, a media ID, or a public link.

Send Interactive

Send an interactive WhatsApp message with reply buttons or a selectable list.

Send Reaction

React to a WhatsApp message with an emoji. Send an empty emoji to remove an existing reaction.

Mark As Read

Mark a received WhatsApp message as read so the sender sees blue checkmarks, optionally showing a typing indicator.

Upload Media

Upload a file to WhatsApp and get a media ID for sending. Uploaded media is retained for 30 days and can back many sends.

Download Media

Download media a customer sent you. Takes the media ID from an incoming WhatsApp message and stores the file in the workflow.

Frequently asked questions

Sim's WhatsApp integration adds 8 tools and 1 trigger to the AI agents you build in Sim's visual workflow builder. Send WhatsApp messages.