01
Turn on Cloud MCP in Kaption
In WhatsApp Web with the Kaption extension (Chrome or Edge), open AI Assistants (MCP) › Cloud Bridge › Enable. In the Kaption desktop app, switch on Cloud MCP in Settings. Keep Kaption open while ChatGPT works.
MCP · ChatGPT
Summarize WhatsApp chats with ChatGPT
Connect WhatsApp to ChatGPT through Kaption, then ask for a summary of any chat or group by name. ChatGPT reads the recent messages, with the text of transcribed voice notes, and tells you what was decided and what is waiting for you.
MCP server address
https://mcp.kaptionai.com/mcpShort answer
How do I summarize a WhatsApp chat with ChatGPT?
Turn on Cloud MCP in Kaption, add https://mcp.kaptionai.com/mcp to ChatGPT and sign in with a code on WhatsApp. Then ask “summarize today’s Sales group”: ChatGPT finds the chat, reads its recent messages through Kaption on your computer, or asks Kaption for its own summary of up to 500 messages, and answers in the conversation. It is unlimited in your first 60 days; after that it uses your plan’s monthly credits.
What do I need to do this in ChatGPT?
Kaption open on your computer (the extension in WhatsApp Web, in Chrome or Edge, or the Kaption desktop app) with Cloud MCP on, a Kaption account (every account starts with 60 days of Business, unlimited; after that, a plan with credits), and ChatGPT. Setup takes three steps:
- 02
Create the app in ChatGPT
Turn on Developer mode in Settings › Apps › Advanced settings (Connectors on some plans), click Create, name it WhatsApp, paste https://mcp.kaptionai.com/mcp and choose OAuth.
- 03
Sign in and pick it in a chat
Enter your phone number and the 6-digit code Kaption sends you on WhatsApp. Then pick the WhatsApp app from the tools menu in a ChatGPT conversation.
What should I ask ChatGPT?
Copy a prompt, paste it into ChatGPT and change the names to your own chats and contacts.
Summarize today’s messages in the Sales group: decisions, open questions, and anything addressed to me.
What happened in my chat with Marta this week? Give me five bullet points.
Which of my unread chats need a reply from me today? One line each.
Summarize the last 200 messages in the Family group and list any dates or plans mentioned.
Summarize my five busiest chats this week in a table: chat, main topic, what they need from me.
What can ChatGPT do here, and what can’t it?
It can
- Find a chat or group by name and read its recent messages, with the text of voice notes Kaption has transcribed.
- Get Kaption’s summary of a conversation, built from up to 500 recent messages, or write its own from the messages it read.
- List your unread chats and tell you which ones look like they need you.
- Keep going from the summary: set a reminder, or draft a reply for you to check.
- Work wherever your ChatGPT plan and workspace allow custom MCP apps. If you don’t see Developer mode, ask your workspace admin or check OpenAI’s help center.
It can’t
- Read locked chats. They are never visible to the assistant.
- Summarize audio that has no transcript: it reads text, so transcribe the voice notes in Kaption first.
- Work while Kaption is closed. Open WhatsApp Web with the extension, or the desktop app, or the tools answer “Extension not connected”.
- Promise a perfect summary. AI can miss sarcasm, inside jokes and who replied to whom, so check the messages before you act on anything important.
What leaves my computer?
ChatGPT receives the messages it reads, or the summary Kaption returns. When Kaption writes the summary, only the text of those messages goes to Kaption’s AI, without your name, number or contacts, and it is never used to train AI models.
Kaption’s relay at mcp.kaptionai.com checks your sign-in and passes each request to Kaption on your computer, which runs it against your WhatsApp and sends back only the answer; the relay does not keep your chats. What comes back, such as message text, names and numbers, goes to ChatGPT, which handles it under its own privacy terms. Locked chats are never visible to the assistant, and you can disconnect at any time.
How many credits does my plan include?
Claude and ChatGPT are unlimited in every account’s first 60 days; after that they need a plan, counted in credits per calendar month: Lifetime local AI 50, Pro 250, and Business 500 with its 2 numbers plus 250 for each extra number, shared by all its numbers, the plan to pick when an assistant uses WhatsApp every day. Business Agent includes them with fair use. A read uses 1 credit, a send 2 and a summary 3. See plans and prices
Questions
Can ChatGPT summarize a WhatsApp group?
Yes. Name the group in your request. ChatGPT looks it up with Kaption, reads its recent messages and summarizes them. For a busy group, say how far back to go, for example “since this morning” or “the last 300 messages”.
How far back can it read?
As far back as you ask, in batches: ChatGPT can ask Kaption for earlier messages before a date. Kaption’s own summary uses up to 500 recent messages. Each batch is a read and uses 1 credit, so long reads use more of your monthly credits.
Does it work with WhatsApp Business?
Yes. Kaption works with personal and WhatsApp Business accounts. With more than one number connected, ChatGPT can pick the account to read from.
Which ChatGPT plan do I need?
One that lets you add a custom MCP app with developer mode. OpenAI changes which plans and workspaces allow it, so if the option is missing, check OpenAI’s help center or ask your workspace admin.
Connect WhatsApp to ChatGPT
Turn on Cloud MCP in Kaption, add the address to ChatGPT and sign in with a code on WhatsApp.
Set up WhatsApp in ChatGPT