Let Grok Bot answer your iMessages through an open-source bridge with an allowlist and a kill switch
Tomas Vykruta built imessage-agent-bridge over a weekend and released it under the MIT license. A helper on their Mac checks for new iMessages (every 15 seconds by default) and passes them to their Grok Bot agents, which text people back on their own. Per the README, the Mac enforces a recipient allowlist, 30 texts an hour, a 1,000-character cap and a kill switch, without giving the bots system access to the Mac.
Try it yourself
What you get
A Mac helper that relays new iMessages to your agent and only lets it text approved numbers, within hourly and length limits.
Tools
- Grok Bot
- imessage-agent-bridge (MIT)
- macOS Messages
- ntfy (default relay)
Steps
- Install the bridge on your Mac using the README.
- Add a short allowlist of numbers your agent may text.
- Keep the default limits: 30 texts an hour and 1,000 characters.
- Know the kill switch: touch ~/.smsbridge/DISABLED or set "enabled": false.
Copy-ready prompt
Help me install imessage-agent-bridge from https://github.com/tvykruta/imessage-agent-bridge on my Mac. Walk me through each step and wait for me to paste command output. Set the allowlist to only these numbers: [NUMBERS]. Keep max_sends_per_hour at 30 and max_body_len at 1000. Then show me how to use the kill switch. When replying to texts, never send money, codes, addresses or links, and ask me first if a message asks for anything unusual.
Watch out: A malicious text can push your agent to send something bad to an approved number. Keep your allowlist short.
Proof / source
Open-source code MIT-licensed GitHub repository and README, plus the author's X post (Oct 14, 2026).
In their words
A malicious text can push your agent to send something bad to an approved number. Keep your allowlist short.
Read the original source ↗ Discussion ↗
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