A phone notification from a Slack workflow

Slack is a destination in YouLMK; it can also be a sender: a Workflow Builder step that sends a web request posts to your key.

Slack's own page was read on 12 September 2026 for every step below. If a menu has moved since, write to hello@youlmk.com and it is corrected the same day.

What Slack sends

Whatever the step's request body says: a title and a body at least.

What arrives in the inbox

Set it up

In YouLMK, create a source of type webhook named after the service, and copy its webhook URL: youlmk.com/w/k_7hq2nk3f9qd8w4 with your own key. Then:

1. In Slack, open Workflow Builder (Slack's help says workflows using webhooks are available on paid plans).
2. Add the step that sends a web request to a URL, paste your source's webhook URL from YouLMK, method POST, and a JSON body with title and body. Slack's help pages read on 12 September 2026 do not document that step's fields; if your plan does not show it, send from Zapier, Make or n8n instead.

Make it quiet where it should be

Everything above lands with the source's own rules: its Reach (Silent, Badge, Banner, Break through), whether quiet hours hold it, and grouping of repeats into one card. Set them once on the source, in the app or at app.youlmk.com; the service never has to change. Unknown fields arrive as rows on the card, up to six; the whole request is capped at 8 KB (Webhooks).

Try it

The trial is 10 notifications and 3 watches, no card. Get your key, or read the webhooks reference first.

Source

slack.com/help, workflows that start outside of Slack (paid plans), read 12 September 2026.