Docs / Alerting

Alerts

Each monitor alerts the channels you pick on its form. New monitors alert every channel by default.

#Channels

Channel	What you need
Slack, Discord, Microsoft Teams	An incoming webhook URL from the app.
Telegram	A bot token from @BotFather and your chat ID.
PagerDuty	An Events API v2 routing key. Incidents open and resolve automatically.
incident.io	An HTTP alert source ID and token. Alerts resolve automatically.
ntfy	A topic name (pick one that's hard to guess) and the free ntfy app.
Pushover	Your user key and an application token.
Email	Up to 10 addresses. Addresses outside your team get a confirmation link first.
SMS and phone call	Team and Business plans (3 during the free trial, to try it). Verify the number under Phone numbers first.
Webhook	Any URL that accepts a POST.

Use Send test on a channel to check it works.

#Phone calls and SMS

Team includes 100 calls and texts a month, Business 500. Numbers must be verified with a code before they can receive alerts. Calls are only made for outages, not recoveries, and read the alert twice.

#Webhooks

A webhook channel POSTs every alert as JSON to your URL, optionally signed. The payload, delivery rules, custom body templates and signature checks in Python, Node and Go are in Webhooks.

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