ChatGPT can connect to remote MCP servers with OAuth sign-in. Add Kaption’s server and ask ChatGPT to search your chats, summarize a group or find a contact.
MCP server address
https://mcp.kaptionai.com/mcpA WhatsApp MCP server lets an AI assistant such as Claude, ChatGPT or Cursor search your WhatsApp chats, summarize conversations, find contacts and set reminders; Kaption’s is at https://mcp.kaptionai.com/mcp and works through Kaption running on your computer. Turn on Cloud MCP in the Kaption extension or desktop app, add the address as a custom connector in your assistant and sign in with a code sent on WhatsApp; the assistant can schedule a message after you confirm it, and it can send one from your computer unless you turn off “Let assistants send messages from this computer” in Kaption.
Unlimited for your first 60 days; after that Claude and ChatGPT need a plan: Lifetime local AI 20 actions a week, Pro (US$11.99 a month) 250 credits a month, Business (US$19.99 a month) 500 with its 2 numbers plus 250 per extra number; Business Agent: included, fair use.
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ChatGPT reads the answer from your WhatsApp through Kaption on your computer. Kaption’s relay checks your sign-in and cannot read your messages.
Open WhatsApp Web in Chrome or Edge with the Kaption extension, then AI assistants (MCP) › Cloud Bridge › Enable. In the Kaption desktop app, switch on Cloud MCP in Settings. In Kaption 0.95 and later, open AI assistants (MCP), click Add an assistant and choose Claude or ChatGPT. Keep Kaption open while the assistant works: the tools only reach WhatsApp while Kaption runs.
Open ChatGPT Settings › Apps (Connectors on some plans) › Advanced settings and turn on Developer mode. The menu names vary by plan; OpenAI’s help center has the current path.
Click Create (or Add custom connector), name it WhatsApp, paste the address below and choose OAuth as the authentication.
The app opens Kaption’s sign-in page. Enter your phone number, type the 6-digit code Kaption sends you on WhatsApp, and choose how long the connection lasts: while you use it (it ends after 90 days without use), 1 year, or until you disconnect it.
MCP server address
https://mcp.kaptionai.com/mcpCustom MCP apps depend on your ChatGPT plan and workspace settings, and OpenAI changes them often. If you don’t see developer mode, ask your workspace admin or check OpenAI’s help center.
Pick the WhatsApp app from the tools menu in a conversation, then ask about your chats.
Search and read chats, summarize conversations, look up contacts and groups, manage labels, notes and reminders, and schedule a message after you confirm it.
Eight jobs ChatGPT can do with your WhatsApp through Kaption, each with the setup, prompts to copy and the limits.
Catch up on a busy group or a long thread in a few lines.
Ask who said what, when, and what they agreed to.
Get the point of long voice notes without playing them.
Have a message go out at the right time, after you check it.
Turn “I’ll get back to you” into a reminder with a time.
Get your contacts, a group’s members or a chat as CSV or JSON.
Plan a week of WhatsApp Channel updates in one request.
Create a community, link groups and send announcements.
Yes, unless you turn it off. Sending from your computer is on by default, and Kaption tells you the first time an assistant sends. The assistant can send to an existing person chat or an eligible group, with one attachment up to 8 MiB. The message is queued for the earliest permitted delivery, within 8 an hour and 20 a day, and your computer and WhatsApp must stay open. To stop it, turn off “Let assistants send messages from this computer” in Kaption → AI assistants (MCP) → Connections; the assistant cannot turn it back on. With it off, the assistant can still schedule one message to one 1:1 chat, up to 800 characters. Either way, it should confirm the text and the recipient with you first. Locked chats are never visible to it.
No. The 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.
Kaption is closed, or Cloud MCP is off. Open WhatsApp Web with the Kaption extension, or the desktop app, and turn the connection on.
Turn on Cloud MCP in Kaption, create the app in ChatGPT, and sign in.