StreamLive ProPost to a Discord or Slack channel with a webhook
Send posts from StreamLive Pro to a Discord or Slack channel through a webhook: how to create the webhook, what each one accepts, file sizes and common errors.
Discord and Slack connect through a webhook: a private web address that lets an app post into one channel. You create the webhook in Discord or Slack, paste it into Connections, and the channel becomes a tick box on Publish everywhere. Discord takes text and one file. Slack takes text and links, but no files.
Before you start
- Access to create a webhook. In Discord that is the channel settings; in Slack it is adding an app to the workspace. If you do not see these options, ask the server or workspace admin.
- One webhook per channel. A webhook posts to exactly one channel. For two channels, create and connect two webhooks.
- Treat the address as a password. Anyone with a webhook address can post to that channel. Paste it only into StreamLive Pro.
Steps
- Create a Discord webhook. Open the Discord channel's settings, go to Integrations, then Webhooks, create one and click Copy Webhook URL. It starts with https://discord.com/api/webhooks/.
- Or create a Slack webhook. In Slack open Apps and add Incoming Webhooks (or, on api.slack.com/apps, open your app and turn on Incoming Webhooks). Click Add New Webhook, pick the channel and copy the address. It starts with https://hooks.slack.com/services/. Slack's own guide: Sending messages using incoming webhooks.
- Connect it. In Connections choose Discord or Slack and paste the whole address. StreamLive Pro checks it with Discord or Slack before saving. A Discord webhook appears as Discord channel webhook. For Slack, give it a name you will recognise, for example the channel name.
- Write the post. On Publish everywhere write the text in the Text box. For Discord you can add one file on Drop a video or photo here; for Slack, put links in the text.
- Pick the channels. Under Post to click the Discord or Slack channel, next to any other networks.
- Publish or schedule. Under When choose Now, or Schedule and a date and time, then click the button at the bottom. The result appears in Activity, lower on the same page.
What each one accepts
| Feature | Discord | Slack |
|---|---|---|
| Text | Up to 2,000 characters; longer text is shortened, with a note | Sent as a formatted message |
| A file | One file, up to 10 MB on a server without boosts | Not possible: Slack webhooks cannot attach files |
| A video you post | Sent as a file if it fits the size | Sent as a link when a lasting public link exists; otherwise the text goes alone and the result says so |
| Mentions like @everyone in your text | Shown as text; nobody is notified | Shown as text |
| Link to the posted message | Yes, in the result | No: Slack webhooks do not return one |
A practical way to share a long video: post it to YouTube in the same publish, then put the YouTube link in the text for Discord and Slack with Adjust per network. Your community gets a playable link instead of a file that is too large.
Removing a webhook
Removing the connection in StreamLive Pro deletes our copy of the address. The webhook itself belongs to you; delete it in Discord or Slack if you no longer want it to work. Delete everywhere does not remove messages from Discord or Slack.
What can go wrong
| Symptom | Likely cause | Fix |
|---|---|---|
| "Paste the whole webhook URL from Discord" | Part of the address is missing | Copy it again with Copy Webhook URL |
| "Discord says this webhook does not exist" | The webhook was deleted in Discord | Create a new one and connect it |
| "Discord webhooks accept files up to 10 MB" | The video is too large | Send a shorter clip, or a link to the video |
| "Slack webhooks cannot attach files" | You added a file for Slack | Add a link to the text, for example your YouTube post |
| "The Slack webhook was removed or its channel archived" | The channel or the webhook is gone | Create a new webhook and connect it |
| "Discord is limiting this webhook" or "Slack is limiting this webhook" | Too many messages in a short time | Wait a minute, then Retry |
Related pages
- Post to Threads, Bluesky and Telegram at the same time: a Telegram channel through a bot.
- Adjust the post for each network: a different text for Discord or Slack.
- Schedule social media posts to several networks at once
Frequently asked questions
Can StreamLive Pro post a video to Discord?
Yes, as a file of up to 10 MB on a server without boosts. For longer videos, post a link instead.
Can StreamLive Pro post a video file to Slack?
No. Slack webhooks cannot attach files. The message goes out with your text, and a link to the media when one is available.
Will @everyone in my text notify the whole Discord server?
No. Mentions in posts from StreamLive Pro are shown as text and do not notify anyone.
Can I post to several Discord channels at once?
Yes. Create a webhook in each channel, connect each one, and tick them all in the same post.
Is it safe to paste my webhook address?
The address works like a password for that channel. Paste it only into StreamLive Pro, and delete the webhook in Discord or Slack if it leaks.
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