Does this post tweets from Slack?

No. The direction is Twitter/X → Slack. XFlux is a read API plus monitors.

Do I need a custom Slack bot?

No. An Incoming Webhook is enough for channel text. Use a bot only if you need Block Kit or threads.

Is the free test the same as live alerts?

The test proves the URL. Live messages when new tweets appear require Starter or higher.

Blog/2026-10-17

Connect Slack to Twitter Alerts with an Incoming Webhook

Step-by-step: watch a public X/Twitter account and post new tweets into a Slack channel. Free test ping, live delivery on Starter. Read-only — this does not post to Twitter.

What you are connecting

This recipe sends public X/Twitter posts into Slack. It does not post from Slack to Twitter, and it is not the official X Account Activity API.

XFlux watches a public @handle. When a new matching post appears, it POSTs a Slack Incoming Webhook body: { "text": "*@author* posted:\n…\nhttps://x.com/…" }. Free can send a test ping. Live hits start on Starter ($19/mo).

Shorter product page: /connect-slack-to-twitter. Webhook reference: /docs/webhooks.

1. Create a Slack Incoming Webhook

In Slack: Apps → Incoming Webhooks → Add to Slack → pick the channel → copy the URL. It looks like https://hooks.slack.com/services/T…/B…/…

Keep that URL secret. Anyone with it can post into the channel.

2. Create a free XFlux monitor

Register at /register?src=blog_slack_recipe (no card on Free). Open Dashboard → Monitors. Add one public @username. Optional keywords limit alerts to posts that mention a ticker or phrase.

Paste the Slack URL as the webhook. Click Test. Slack should show: XFlux test OK — monitor @handle is connected.

3. Turn on live delivery

Free stores hits in the Dashboard and can send the test ping. Starter and above deliver a Slack message when a new matching tweet is detected.

The same monitor accepts a Discord webhook or your own HTTPS URL. Swap the URL; do not build a second poller.

FAQ

Does this post tweets from Slack?: No. The direction is Twitter/X → Slack. XFlux is a read API plus monitors.
Do I need a custom Slack bot?: No. An Incoming Webhook is enough for channel text. Use a bot only if you need Block Kit or threads.
Is the free test the same as live alerts?: The test proves the URL. Live messages when new tweets appear require Starter or higher.

Build with XFlux

Free tier for reads and one monitor. Starter from $19/mo for signed webhooks and faster polling.