In Feishu, open the group where you want to receive alerts. Go to the group settings, find the bot section, and add a custom bot.
After adding the bot, copy its Webhook URL. It usually starts with https://open.feishu.cn/.
For extra security, go to the bot's security settings, enable signature verification, and copy the secret key.
Go back to the Reminders page on the website, find the Feishu bot card, and make sure Enable is turned on.
Paste the address into the Webhook URL field. If you enabled signature verification, paste the key into Sign secret; otherwise leave it blank.
Click Save changes at the bottom of the page, then click "Send test message" and check your Feishu group.

The Webhook URL only accepts the official Feishu domains open.feishu.cn or open.larksuite.com (https). Any other address will be rejected to protect against phishing.

Whether Feishu delivers alerts and whether it makes a sound during do-not-disturb hours is controlled by the Feishu app's own settings — we have no control over that. Encrypted credentials are used for storage; only a masked value is shown on the page.

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