Connect WhatsApp Business to Claude and ChatGPT
Yes — Claude and ChatGPT can both read, search and reply to your WhatsApp Business messages through Mailopoly, which is listed in the Claude Connectors Directory and is an approved app in the ChatGPT app directory. Connect WhatsApp Business to Mailopoly through Meta's embedded sign-up, add Mailopoly in Claude or ChatGPT, and ask. The whole setup takes about a minute. You need a WhatsApp Business number, not a personal WhatsApp account, and business channels are a Pro or Business plan feature.
Before you start
- A Mailopoly account — 7-day free trial, no credit card.
- A Mailopoly Pro or Business plan — messaging channels aren't on the email-only plans.
- You need a WhatsApp Business number, not a personal WhatsApp account, and business channels are a Pro or Business plan feature.
- Claude on any plan, including Free, or ChatGPT with apps enabled.
Connect WhatsApp Business to Claude or ChatGPT in three steps
1Connect WhatsApp Business to Mailopoly
- Start a Mailopoly account at mailopoly.com/sign-up on a Pro or Business plan.
- In the Mailopoly web app open Profile → Apps and choose Connect WhatsApp.
- Complete Meta's embedded sign-up with the Facebook account that manages your WhatsApp Business number. Mailopoly is a verified Meta Tech Provider, so the whole flow happens on Meta's own pages.
- Your number keeps working in the WhatsApp Business app — Mailopoly runs alongside it (WhatsApp Business coexistence), and new conversations arrive in your Mailopoly inbox next to your email.
Already signed in? Open Profile → Apps in the Mailopoly web app ↗
2Add Mailopoly to Claude or ChatGPT
This part is the same whatever you connected in step 1. Mailopoly is listed in both directories, so it's a search and a tap — no endpoint URL to paste.
Claude
- Open Settings → Connectors on claude.ai or in the Claude app — or choose Add connectors from the + menu in any chat.
- Search the directory for Mailopoly and choose Connect.
- Sign in with your Mailopoly account when prompted, then choose what Claude is allowed to do. Reading, making changes and sending are separate permissions.
- Back in the chat, make sure the Mailopoly connector is switched on, then ask.
One listing covers Claude.ai, Claude Desktop, Claude mobile, Claude Code and Cowork, and it works on every Claude plan, including Free. In Claude Code you can also run claude mcp add --transport http mailopoly https://fastapi.prod.aws.mailopoly.com/mcp-server/ and then /mcp to sign in.
ChatGPT
- Open the Apps directory in ChatGPT — from the + menu in any chat, or Settings → Apps & Connectors.
- Search for Mailopoly and choose Connect.
- Sign in with your Mailopoly account when prompted, then choose what ChatGPT is allowed to do. Reading, making changes and sending are separate permissions.
- In any chat, type
@Mailopolyand ask.
Mailopoly is an approved app in the ChatGPT app directory, so there's no developer mode and no endpoint URL to paste. Once connected it's available in every ChatGPT conversation on the web and in the mobile apps.
Using something else? Claude Code, Cowork, Codex and any client that supports remote MCP servers connect the same way — the Mailopoly MCP page has the endpoint and per-client steps.
3Ask about your WhatsApp
Whatever you've connected to Mailopoly is what your assistant can reach. Some things people ask on day one:
- What WhatsApp messages came in from customers today?
- Summarise the WhatsApp conversation with the caterer this week.
- Reply on WhatsApp to the last customer message — tell them the order ships Monday.
What Claude and ChatGPT can do with WhatsApp Business through Mailopoly
- Read and search your WhatsApp Business conversations alongside your email, in one question.
- Catch up on a week in a channel. "What happened on WhatsApp this week?" comes back as a summary, not a scroll.
- Find the message you half remember — by person, date or topic, across WhatsApp and every inbox you've connected.
- Reply back out through WhatsApp, from the account or handle the message came in on. Sending is a separate permission and a confirm-first action.
- One feed, one task list. WhatsApp messages that need action land in My Day next to the emails that do.
- Unified with your email. Ask about a customer and get their WhatsApp thread and their emails in the same answer.
Reading, making changes and sending are separate permissions you grant when you connect, and you can revoke an assistant at any time from Settings → Security in the Mailopoly app. More on the security page.
What goes wrong with WhatsApp Business, and the fix
- Personal WhatsApp accounts can't be connected. Meta's platform only works with WhatsApp Business numbers.
- A number already registered to another WhatsApp Business Platform account can't be added until it's released there.
- Business-initiated messages need an approved template. Replying inside a customer's 24-hour window is free-form; starting a conversation uses a WhatsApp template you've had approved.
- Coexistence keeps the app working. Connecting to Mailopoly doesn't move the number off your phone.
7-day free trial, no credit card. Connect WhatsApp Business in about a minute.
Frequently asked questions
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