MCP servers · WhatsApp Business · MCP server
Connect Codex CLI to WhatsApp Business
One line gives Codex CLI your WhatsApp Business account as tools: 6 endpoints, send message, media, templates, called with your own connection. No key in the prompt, a receipt for every call, revoke Codex CLI's access alone any time.
Three steps
- Create a free 0n3 account and connect WhatsApp Business. Paste a key or sign in; it lands in your vault, encrypted.
- Install 0n3 into Codex CLI. OpenAI's terminal agent reads 0n3 over Streamable HTTP with a token from your environment.
- Ask Codex CLI: whoami. Then: "Send a text message in WhatsApp Business".
Put the token in your environment
export ON3_TOKEN="<your 0n token>"
Add it to your shell profile so Codex finds it next time.
The line above carries a placeholder; 0n3.app/install mints a real key named for Codex CLI and fills it in.
What Codex CLI can then do in WhatsApp Business
Send message · Send messages via WhatsApp4
Send a text message
POST /{phoneNumberId}/messagesSend a template message
POST /{phoneNumberId}/messagesSend a media message
POST /{phoneNumberId}/messagesList templates
GET /{businessId}/message_templatesMedia · Upload and retrieve media2
Upload a media
POST /{phoneNumberId}/mediaGet a media url
GET /{mediaId}Templates · Manage message templates0
Manage message templates
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