WhatSync
WhatsApp for Claude Code
Your bug reports arrive on WhatsApp. Your fixes happen in Claude Code. One command connects the two.
How do you connect WhatsApp to Claude Code?
Run claude mcp add --transport http whatsync https://whatsync.app/api/mcp, then run /mcp inside Claude Code and sign in. Link your WhatsApp from the dashboard, and Claude Code can read your chats and send messages you approve.
- Works in
- Claude Code in your terminal and editor
- You need
- Claude Code. WhatsApp on your phone, or a WhatsApp Business API number.
- WhatSync server
- Hosted for you. Nothing to run yourself.
What Claude Code can do with your WhatsApp
Bug reports from the source
Pull the exact message, screenshot name and steps a user sent on WhatsApp.
Tell people it is fixed
After the fix ships, Claude Code drafts the update to the team group for you to approve.
Build on WhatsApp
Test your own WhatsApp bot or campaign flow with real tools, without writing an API client.
Add WhatSync to Claude Code
You sign in to WhatSync once. No API keys to paste. Check what you need above first.
Add the server
Run this in your terminal. Add
--scope userto use WhatSync in every project.claude mcp add --transport http whatsync https://whatsync.app/api/mcpSign in
Start Claude Code, run
/mcp, pick whatsync and sign in with Google or your email./mcpLink 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.
Things to ask Claude Code
Copy one, change the names, and try it.
Use WhatSync to find the checkout bug Rahul described on WhatsApp yesterday, then find it in this repo.
Read the last 20 messages in the Dev team group and list open questions about the API.
When the tests pass, draft a short WhatsApp to the QA group saying the fix is on staging.
List our WhatsApp Business templates and check which ones Meta approved.
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.
- Claude Code asks before each tool call unless you allow it. Do not auto-allow the send tools.
- Use
--scope userto keep the server out of a shared project's .mcp.json. - 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
Claude Code 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.
How do I add a WhatsApp MCP server to Claude Code?
claude mcp add --transport http whatsync https://whatsync.app/api/mcp, then /mcp to sign in. No local install, no Python, no Go.Do I need to keep anything running?
Can I use it in headless mode or CI?
Do I need to install anything?
Does it work with the WhatsApp Business API?
Is WhatSync made by Anthropic?
How much does it cost?
Sources
We checked these steps against Claude Code's own docs on October 13, 2026. Menus change, so a screen may look a little different. WhatSync is not made or endorsed by Anthropic.
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 Claude Code
Your WhatsApp keeps working on your phone as normal. Unlink it whenever you like.