# Slack alerts aren't showing up. What should I check?

> Open Where alerts go on the Leads tab, press Send a test under Slack alerts, and read the answer your portal shows. Slack said HTTP 404 (no_service) means the webhook was removed, channel_is_archived means the channel was archived, and action_prohibited means a Slack admin limits posting there. Connect the channel again, pick another channel, or ask your Slack admin.

Reviewed 2026-10-27.

## Read the test

- Posted. Check the channel in Slack: the test worked, and Posting to shows the channel that gets alerts.
- Slack said HTTP 404 (no_service): the webhook was removed or turned off in Slack. Connect the channel again with Change channel, or paste a new webhook after Change.
- An answer with channel_is_archived: the channel was archived. Pick another channel.
- An answer with action_prohibited: a Slack admin limits who can post in that channel. Ask them, or pick another channel.
- Couldn't reach Slack: the test didn't get an answer. Press Send a test again.
- That's enough tests for this hour: Send a test works 6 times an hour.
- No Send a test button: the webhook isn't saved yet. Press Save at the bottom of Where alerts go.

![Slack alerts once connected: Posting to #demo-leads in Northwind, with Send a test, Change channel, and Turn off.](https://storage.googleapis.com/demopage-media/docs/slack-connected.bf9c549cc6b5.webp)

## After Add to Slack

- Slack is connected, but the test message didn't post: the channel is saved, but the first message didn't go through. Press Send a test and read its answer.
- Slack wasn't connected: the install was cancelled in Slack. Press Add to Slack again, then Allow.
- That Slack link expired or was started from another account: start again with Add to Slack, in your own portal.
- Slack didn't finish connecting: press Add to Slack again, or paste a webhook instead.
- Add to Slack isn't switched on yet: paste a webhook instead. How do I set this up? shows the steps.
- If your workspace only allows approved apps, Slack sends your admin a request instead of installing. Once they approve DemoPage, press Add to Slack again.

[Clip: Opening How do I set this up? beside Slack alerts in Where alerts go, then pointing at the Add to Slack button.](https://storage.googleapis.com/demopage-media/docs/slack-tip.df314c8d6f6f.mp4)

## Pasting a webhook

The address has to start with https://hooks.slack.com/services/. Anything else says Paste a Slack incoming webhook, which starts with https://hooks.slack.com/services/. Paste it, press Save, then press Send a test.

![The Slack alerts field in Where alerts go, with a webhook address that starts with https://hooks.slack.com/services/ pasted in.](https://storage.googleapis.com/demopage-media/docs/slack-field.26b3a10dcf4e.webp)

## If the test posts but alerts don't

- The channel gets finished live demos, live demo requests, people watching the recording, and requests for pricing or a follow-up. Demos made for CRM leads and pages kept out of demos post there too.
- A live demo posts when it ends, not when it starts.
- Watching and follow-up alerts post once a day for each visitor. Every finished live demo and every live demo request posts.
- Turn off stops Slack alerts, and email alerts and Latest leads keep working. [Pause alerts](https://demopage.io/help/pause-alerts.md)
- Email works alongside Slack. [Alert emails aren't arriving](https://demopage.io/help/no-alert-emails.md)

## Still stuck?

[Talk to us](https://demopage.io/help/contact-us.md) with your demo link, the channel name, and the answer Send a test showed.

Step by step: [If nothing shows up](https://demopage.io/docs/slack-alerts.md#troubleshooting).

## Related questions

- [How do I get demo lead alerts in Slack?](https://demopage.io/help/slack-alerts.md)
- [I'm not getting lead alert emails. What should I check?](https://demopage.io/help/no-alert-emails.md)
- [How do I stop lead alerts for a while?](https://demopage.io/help/pause-alerts.md)
- [Where do my demo leads go?](https://demopage.io/help/where-leads-go.md)

Still stuck? Email hello@demopage.io. All questions: [Help center](https://demopage.io/help.md).