0n3
MCP servers · Twilio · MCP server

Connect Codex CLI to Twilio

One line gives Codex CLI your Twilio account as tools: 3 endpoints, send sms, make call, list messages, called with your own connection. No key in the prompt, a receipt for every call, revoke Codex CLI's access alone any time.

Get the line for Codex CLIConnect Twilio first

Three steps

  1. Create a free 0n3 account and connect Twilio. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into Codex CLI. OpenAI's terminal agent reads 0n3 over Streamable HTTP with a token from your environment.
  3. Ask Codex CLI: whoami. Then: "Send sms in Twilio".
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 Twilio

Send sms · Send SMS messages1
Send smsPOST /Accounts/{accountSid}/Messages.json
Make call · Initiate phone calls1
Make callPOST /Accounts/{accountSid}/Calls.json
List messages · List sent messages1
List messagesGET /Accounts/{accountSid}/Messages.json

Twilio in other AI clients

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Codex CLI with other apps

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