AI agents
M91
Human-in-the-loop approval for AI agents
- 0community votes
- 73DR by Ahrefs no change since last check
Ahrefs Domain Rating signal 13 Nov 2026, signal shifted 25 Oct 2026.
M91 sends urgent alerts to the right person's phone, breaking through silent mode and Do Not Disturb, with answer buttons that send responses back to your AI or
What it is
M91 is a human-in-the-loop approval system for AI agents and software. When your AI or software needs a person to approve, decide or act on something, M91 notifies them on their phone as a full-volume alert that breaks through silent mode and Do Not Disturb on iPhone and Android. The alert includes answer buttons you or your AI set, and keeps ringing until somebody responds. If nobody answers, M91 escalates to a phone call for high and critical alerts. The person's answer goes back to your software via a webhook so waiting for human approval becomes an ordinary step in your code. You can set it up by pasting a prompt into your coding agent, use your send link in workflow tools, or integrate via SDK and HTTP API. Every feature is free forever with no trial, card requirement or seat count.
Systems
- Alerts on iPhone and Android with answer buttons
- Phone call escalation for high and critical alerts
- Breaks through silent mode and Do Not Disturb
- Attachments and notes on every alert
- Broadcast to a channel with one person taking ownership
- See who acted and who ignored alerts
- Answer buttons set by you or your AI
- Callback webhooks to return answers to your code
- Setup via pasted prompt or API key-free send link
- Integration with AI frameworks, automation platforms and HTTP API
Pricing
Pricing model: Free
Free forever with all features included
Want to see what M91 does next? Follow them for milestones, new products and stories by email.
M91 metrics
Signal readout for m91.msg91.com: Ahrefs Domain Rating and Majestic link signals, arrows for the change since the last scan.
- 73 Domain Rating no change since last check
- 1 Trust Flow no change since last check
- 1 Citation Flow no change since last check
- 0 Referring domains no change since last check
- 0 External backlinks no change since last check
Ahrefs Domain Rating signal 13 Nov 2026, signal shifted 25 Oct 2026. Strongest signal topic: Computers/Internet/Web Design and Development (1). Majestic signal 25 Oct 2026, signal shifted 25 Oct 2026. Link signals from Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
M91 domain signal
Show the signal details
Public RDAP record, last read 13 Nov 2026, 14:09 UTC.
- Domain age 18 years
- Registered
- Expires
- Registrar PDR Ltd. d/b/a PublicDomainRegistry.com
- DNSSEC Not signed
M91 post-launch signal
The record for M91 after its launch on Nexora Launch (25 October 2026), from the readings we keep.
- 73 Domain Rating (Ahrefs) no change since launch
at launch: 73 (25 Oct 2026); latest: 12 Nov 2026 - 1 Trust Flow (Majestic)
first measured 25 Oct 2026 - 0 Referring domains (Majestic)
first measured 25 Oct 2026
Day 18 since launch. Next receipt: day 30, 24 Nov 2026. A change here is a reading, not a claim about its cause; lots of things move these figures. Anything we do not measure is not shown.
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Quick answers
- What is human-in-the-loop approval for AI agents?
- It is a step where an AI agent or software stops and asks a person before it acts, such as approving a refund, confirming a deploy, or answering a question it cannot decide. With M91, the question arrives on the right person's phone as an alert with your answer buttons, and their answer goes back to the software.
- What happens if nobody answers?
- M91 keeps trying by ringing the alert again, and for high and critical alerts it escalates to a phone call. If the schedule runs out, the channel owner is told and the alert stays open rather than being marked as handled, and everything stops the moment somebody responds.
- Does it ring when my phone is on silent or Do Not Disturb?
- Yes. An M91 alert is a full-volume interruption that breaks through silent mode and Do Not Disturb on iPhone and Android, and it keeps going until somebody answers.
- How does my AI agent get the person's answer?
- Add a callbackUrl to the alert, and M91 sends a signed request to it when a person answers and again when the alert closes, so waiting for a human becomes an ordinary step in your code.
- Is M91 free?
- Yes. Every feature, every alert and every person on your team is free forever with no trial, no card requirement and no seat count.
M91 has a free listing. The owner can unlock the full profile with a paid launch for $5:
- Founder story (locked)
- Milestones (locked)
- Demo video (locked)
- Dofollow website link (locked)
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