WhatSync
WhatsApp for Lindy
Lindy runs your busywork on its own. With WhatSync, it can keep an eye on your WhatsApp too.
How do you connect WhatsApp to Lindy?
In Lindy, open Integrations, click + Add and choose MCP. Paste the WhatSync server URL, name it WhatSync and click Connect, then sign in. Each WhatSync tool becomes a Lindy action your agents can use.
- Works in
- Lindy agents and workflows
- You need
- A Lindy account. WhatsApp on your phone, or a WhatsApp Business API number.
- WhatSync server
- Hosted for you. Nothing to run yourself.
What Lindy can do with your WhatsApp
Chats waiting on you
Lindy checks every half hour who is waiting on a reply and tells you, so nobody waits a day.
Replies you approve
It drafts the answer from the chat history and sends it once you approve.
WhatsApp in your workflows
Turn a WhatsApp request into a task, a calendar invite or a row in a sheet, next to Lindy's other integrations.
Add WhatSync to Lindy
You sign in to WhatSync once. No API keys to paste. Check what you need above first.
Add WhatSync as an MCP server
Open Integrations, click + Add and choose MCP, not Integration. Paste the server URL and set the display name to WhatSync. Leave Advanced empty: WhatSync signs you in itself.
https://whatsync.app/api/mcpConnect and sign in
Click Connect and sign in to WhatSync with Google or your email. WhatSync then shows in your list with its tool counts.
Link your WhatsApp
Open your WhatSync dashboard and link your personal WhatsApp from Linked devices on your phone, or connect the WhatsApp Business API. If you ask your agent something first, it replies with a sign-in link that works for 15 minutes.
Choose what it can see
In Settings, under What's saved, enable message saving, pick the groups to include and keep any person out. Groups stay off until you tick them. Your agent sees messages saved from the moment you turn saving on, not your whole WhatsApp history.
Set sends to ask first
In the server's Guardrails, choose Ask for approval, so Lindy checks with you before any WhatsApp message goes out. You can also turn off any tool you don't want in Actions.
Things to ask Lindy
Copy one, change the names, and try it.
Use WhatSync. Every 30 minutes, check which WhatsApp chats are waiting on my reply and send me the list.
When a new client messages me on WhatsApp, draft a reply from our past chats and ask me before sending it.
Find what Sara said about the delivery date and add it to the order notes.
Good to know
You choose which chats are saved, and you can unlink WhatsApp from your phone at any time. How we handle your data.
- Lindy connects to WhatSync with OAuth sign-in, and WhatSync customers run Lindy agents on their WhatsApp today.
- Every enabled tool is one Lindy considers on each task. If an agent only needs to read, turn off the send and campaign tools in Actions.
- Shared with your workspace, other members' agents can use your WhatsApp too. Keep Availability on Only you unless that's what you want.
- Sends are real WhatsApp messages. Set the send tool to ask you every time in your AI app's settings. Telling the agent "ask me first" in a chat is not the same thing.
- Messaging many customers? Use the Business API, and only message people who agreed to hear from you. Bulk messages from a personal number can get it restricted by WhatsApp.
- Search looks at message text, file names and captions. On Pro and up it also covers voice notes turned into text and the words in photos and scanned documents.
- Groups only work on a personal WhatsApp linked from your phone. The Business API covers customer chats, templates and campaigns.
- "Waiting on you" means the last message in a chat came from the other person. It's a hint to check, not a to-do list.
Personal WhatsApp or the Business API
Lindy can tell which one you have and uses the right tools for it.
Your personal WhatsApp
- Link the WhatsApp you already use
- Chats, groups, files, polls and reactions
- For normal one-to-one use, not bulk sending
WhatsApp Business API
- Templates and campaigns your agent can send
- Meta reviews templates and charges per message
- Only for customers who opted in
Questions
Something else? Ask us.
Can Lindy use WhatsApp?
Do I need an API key for Lindy?
Will Lindy message people without asking?
Do I need to install anything?
Does it work with the WhatsApp Business API?
Is WhatSync made by Lindy?
How much does it cost?
Sources
We checked these steps against Lindy's own docs on October 22, 2026. Menus change, so a screen may look a little different. WhatSync is not made or endorsed by Lindy.
Use it in your other AI apps too
One WhatSync account works in all of them. Each guide says what you need.
Add WhatSync to Lindy
Your WhatsApp keeps working on your phone as normal. Unlink it whenever you like.