WhatSync
WhatsApp for Grok
Add WhatSync as a custom connector and Grok can read the chats you choose, catch you up on groups and reply when you approve.
How do you connect WhatsApp to Grok?
Go to grok.com/connectors, click New Connector, choose Custom, and paste the WhatSync URL. Sign in and link your WhatsApp. In Grok Build, xAI's terminal agent, add the same URL as an MCP server.
- Works in
- Grok on the web and Grok Build in your terminal
- You need
- A Grok account. WhatsApp on your phone, or a WhatsApp Business API number.
- WhatSync server
- Hosted for you. Nothing to run yourself.
What Grok can do with your WhatsApp
Fast catch-ups
Ask what you missed and get the short version of every busy chat.
Find the message
Search every saved chat for a name, price or link.
Ship and tell the team
In Grok Build, finish the fix and post a short update to the team group.
Add WhatSync to Grok
You sign in to WhatSync once. No API keys to paste. Check what you need above first.
Add a custom connector
Open grok.com/connectors, click New Connector, then Custom, and paste the server URL.
https://whatsync.app/api/mcpSign in to WhatSync
Finish the sign-in with Google or your email. Grok then finds the WhatSync tools.
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
On the What's saved page, enable message saving, pick the groups to include and keep any person out. Groups stay off until you tick them. The agent can read permitted messages saved since you enabled saving; linking does not import your entire WhatsApp history.
Using Grok Build?
Inside a Grok Build session, run
/mcps, open the MCP tab and paste the URL. Or add it from the command line. Rungrok mcp --helpif your version uses different flags.grok mcp add --transport http whatsync https://whatsync.app/api/mcp
Things to ask Grok
Copy one, change the names, and try it.
Use WhatSync. What did I miss in my WhatsApp groups today?
Find the link Sam sent me about the apartment.
Who asked me a question this week that I never answered?
The bug Priya reported on WhatsApp: find her message and fix it.
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.
- On Grok Business and Enterprise, a team admin may need to allow the connector first.
- Grok Build can run many steps in a row. Keep it asking before it sends.
- Sends are real WhatsApp messages and run when your AI app allows the tool call. Keep send tools on manual approval and review the recipient and text. Asking the agent to wait is not an enforced approval setting.
- Use the Business API for campaigns to customers who opted in. The Business API does not permit unsolicited messages. Linked personal accounts can be restricted for violating WhatsApp's rules.
- Search covers saved message text, file names and captions. WhatSync does not index document contents, transcribe voice notes or read text inside images. A download link is available only when WhatSync saved the file.
- Group searches and replies require a linked personal WhatsApp. WhatsApp Business API tools work with customer conversations, templates and campaigns.
- An unanswered conversation means its latest saved message in the checked period is incoming. It is a follow-up signal, not proof that a question is unanswered or that you owe a reply.
Personal WhatsApp or the Business API
Grok can tell which one you have and uses the right tools for it.
Your personal WhatsApp
- Link the WhatsApp you already use, like WhatsApp Web
- 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.
Does Grok support custom MCP servers?
Is Grok Build different from Grok?
Do I need to install anything?
Does it work with the WhatsApp Business API?
Is WhatSync made by xAI?
How much does it cost?
Sources
We checked these steps against Grok's own docs on October 13, 2026. Menus change, so a screen may look a little different. WhatSync is not made or endorsed by xAI.
Use it in your other AI apps too
One WhatSync account works in all of them. Each guide says what you need.
Put your WhatsApp to work in Grok
Your WhatsApp keeps working on your phone as normal. Unlink it whenever you like.