SignalBotOne – Notification Webhooks for Signal

[mig39]

"Houti Alert" is a hilarious sample notification.

[mikepurvis]

Combined with the demo phone being at zero battery, I'm getting a lot of "early April Fools" energy off of this one.

[28304283409234]

"However, it is not recommended to use the API to send passwords or war plans."

[ryanisnan]

Cease and desist from Signal incoming, from their legal terms:

> "Signal", Signal logos, and other trademarks are trademarks or registered trademarks of Signal Technology Foundation in the United States and other countries (more info here).

[vlovich123]

This isn’t an official thing from Signal?

[cuu508]

My SaaS is sending monitoring notifications using signal-cli, and I regularly run into rate limits (enforced by Signal servers, not signal-cli), especially when sending to new numbers/usernames.

To the author--do you have any plans on how to work around that?

[stavros]

I guess they've hit the limit, because the bot isn't responding for me.

[inetknght]

Why should the author work around Signal's rate limiting? Are you asking the author to enable spamming?

[0x073]

Doesn't signal ban third party clients?

Personal i wouldn't rely on those notifications and just stick with good working notification services.

[ranger_danger]

Doesn't appear to be open source... absolutely not.

[gruez]

Does it matter? It's a SaaS anyways, so if they wanted to go rogue and use it to eavesdrop on your chats open source wouldn't really prevent that. They even specifically recommend using a dedicated group chat for notification purposes. For self-hosted deployments there's already a multitude of projects that expose an API to send signal messages.

[npodbielski]

Seems interesting but it looks like some cli with web server running on someone else's machine, so basically no security, no encryption. Also probably this bot have an access to your entire chat history.

[gwillem]

The bot has access to any sent messages to yourself, plus any chatter in group chats if you have enabled that. So don't use it for sensitive stuff, and use a dedicated group. It was developed to relay sensor data and such, not war plans.

[Krasnol]

I love the Signal Home Assistant Add-On. Now home assistant delivers all messages.

I use it for RSS news, device notifications, debugging,...

This so good, I'm afraid it might go away.

https://www.home-assistant.io/integrations/signal_messenger/

[atmanactive]

What is the advantage of using Signal for notifications compared to just using notifications built-in into Home Assistant mobile app?

[aeblyve]

Nice! I was considering setting up telegram/slack/discord for personal push notifications of events in personal IT infrastructure, since Signal is fairly undercooked in this department, but this might be a good solution for me.

[aeblyve]

Unfortunately I did not receive an instant webhook url... presumably the service was crushed to death.

[theshrike79]

Still waiting for a native bot API for Signal before I can fully start using it :/

[bionhoward]

Better docs would be appreciated! Can you guide us to use it? I’m not a slack guy because it’s too distracting, but easy secure chat integrations could be big … keep it up!

[throwaway-blaze]

Maybe I'm just dense but is there a sample curl somewhere for how to send something to the API URL I just got in my signal chat with BotMaster.1000?

[eddythompson80]

The curl command on the homepage?

curl -d 'something' <your url>

[laidoffamazon]

> However, it is not recommended to use the API to send passwords or war plans.

Very good

[karparov]

Who is behind this and how does it work?

Why is this information not present on the front page?

And why does somebody who thinks people would start using and relying on it not immediately understand that that's important information?

[gruez]

pretty clear to me.

>Who is behind this

SignalBot − built by gwillem © 2025

contact (link to a signal group)

>and how does it work?

"Receive messages on Signal via a simple API. Perfect for notifications and alerts."

"curl -d ' Houthi alert' https://signalbot.one/api/..."

If you don't know what "API" or "webhooks" are, then you're probably not the target audience. That's fine. Your aunt probably doesn't know what an "enterprise workload engine"[1] is, but that doesn't mean vmware needs to provide a dumbed down description so everyone can understand.

https://www.vmware.com/products/cloud-infrastructure/vsphere

[andrewinardeer]

Not working for me. Even with a Houthi alert.

[gwillem]

Contact me via the support link?

[mmh0000]

I'm suprised "privacy conscience" people use Signal.

Like... Sure! let me just give you my PHONE NUMBER THAT LINKS DIRECTLY BACK TO MY REAL-WORLD IDENTITY so that I can send "secure" text messages.

Signal promoters are clowns.

[droopyEyelids]

Do you think its possible that they could be optimizing for a different problem domain than the one you judge them for?