WhatsApp · AI agents
Third-party AI agents
inside WhatsApp
A new WhatsApp setting lets you add your own AI agent as a chat. Here is how it connects, what it can and cannot see, and when you need a connector that works on your whole account instead.
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What are WhatsApp third-party agents?
WhatsApp third-party agents are AI agents or bots, hosted by another service, that you add as a chat inside WhatsApp. WABetaInfo reported the feature on September 4, 2026 in WhatsApp beta for Android 2.26.35.3, rolling out gradually to more accounts.
You create an agent from the app settings: a name, an optional photo, and WhatsApp generates an API key. You paste that key into the service that runs the agent, which can be built on the agent platforms of companies like OpenAI, Google or Anthropic. From then on the agent answers you in its own chat.
The limits are clear. Up to five agents per account. Agents work in individual chats only, not in groups or communities. An agent sees what you share in its chat, not your other conversations, contacts or media. And those chats are not end-to-end encrypted: the agent's developer can access the messages, while your personal chats stay encrypted.
So a WhatsApp agent is someone you talk to, not something that acts on your account. If you want an assistant to read a thread with a client, draft the reply and send it from your number, or to send the same message by email, you need a different tool: an MCP connector on your linked account.
How it connects
Adding a third-party agent, step by step
- 01
Open the Agents setting
On an account that has the feature, create a new agent from the app settings.
- 02
Name it
Give it a name and, if you like, a profile photo. That is how it appears in your chat list.
- 03
Copy the API key
WhatsApp generates an API key for this agent.
- 04
Paste it where the agent runs
Enter the key in the service hosting your agent. It can then receive and answer the messages you send in its chat.
Two different jobs
WhatsApp agent chat or an MCP connector on your account
One is a chat with a bot. The other gives the assistant you already use tools to work on your WhatsApp and email.
| WhatsApp third-party agenta chat inside WhatsApp | MCP connectortools on your linked account | |
|---|---|---|
| Who the AI talks to | Only you, in its own chat | Your contacts, from your number, when you ask |
| Reads your other chats | No, only what you share with it | Yes, the conversations you point it to |
| Groups | No, individual chats only | Can read and send in your groups |
| Encryption | Agent chats are not end-to-end encrypted | Messages pass through the service and your AI provider |
| Availability | Rolling out gradually, starting with Android beta | Available now, any phone you can link |
| No | Yes, from your own mailbox |
Setup
Give your assistant your WhatsApp instead
- 01
Create a free account
Sign up at app.unlimitedmessaging.app, without a credit card, and link your WhatsApp number by QR code, like WhatsApp Web.
- 02
Add the connector
In Claude, ChatGPT, Claude Code or Cursor, add the MCP server https://mcp.unlimitedmessaging.app and approve the OAuth sign-in.
- 03
Ask in plain language
"Summarize what Paul sent me this week and draft a reply": the assistant reads the thread, shows the draft and sends it from your number when you confirm.
FAQ
WhatsApp third-party agents: your questions
Sources
Sources & references
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Written by
Ilian · Senior Software Engineer
A senior software engineer, he founds and runs several tech companies. He builds products around messaging APIs, automation and AI integration, and shares here what he learns while building.
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