Get a Slack alert when a price drops

Alerts turn a dataset into something that tells you when to look. This tutorial adds a rule to the price tracker from the previous tutorial and sends it to Slack. The same steps work for any dataset and any channel.

A rule evaluates on every publish and fires to the channels you pick.

1. Connect Slack

Create an incoming webhook in Slack. In Slack, open the channel you want alerts in and add an Incoming Webhook app to it. Copy the webhook URL.
Add the integration in Jsonify. Open Integrations → Add integration → Slack, paste the webhook URL and give the integration a name such as #market-radar-alerts.
Test it. Use the test action on the integration; a message arrives in the channel within a few seconds. The integration shows as connected.

Integrations page with a connected Slack integration named market-radar-alerts — A connected Slack channel. One integration can serve many rules.

The webhook URL is a secret. Anyone with it can post to your channel. Keep it in the integration only.

2. Write the rule

Open Alert Rules → New alert rule.
Describe the condition. Either pick a quick-start chip or describe what you want. Jason proposes the rule; you confirm it.

Alert me when a product’s current price is at least 10% below its previous price in the Live product offers dataset.
Choose the channels. Tick In-app and the Slack integration you connected. Add email if you want a copy.
Confirm. The rule appears as a card with its toggle on.

Alert Rules page with the Meaningful price drops rule card showing severity, condition summary and Slack channel — The rule as a card. Toggle it off any time without deleting it.

3. See it fire

The rule evaluates the next time the dataset publishes. When it matches, one alert is created per event: it appears on the Alerts page and the bell badge, and the Slack message lands in the channel with a link back to the rows that triggered it.

Alerts page showing a fired alert for 18,420 meaningful price drops with time, channel and rule — The alert as it appears in Jsonify.

What the Slack message looks like:

Meaningful price drops · Market Radar Prices fell by at least 10% across 18,420 tracked offers. Top: Sony WH-1000XM6 (Amazon) $348 → $279. Open the rows →

Variations

Run failures. “Tell me in Slack when any pipeline in this workspace fails.” Useful for hearing about escalated repairs.
New items. “Alert when a new product appears in the catalogue.”
A specific value. “Alert when any product from Apple goes out of stock at Best Buy.”
Jason’s judgement. “Alert when a promotion looks like a clearance.” Jason evaluates each new row against the description.

See Alert rules for every condition type and channel.

Alert rules

All six condition types, channels and the rule editor.

Slack and email

Everything about the Slack integration and email digests.

Alert history

The Alerts page, the bell, browser push.