Warp + Slack
Post to Slack from Warp
Ask Warp to write and schedule your Slack messages. BrokenPost connects the two, follows Slack's rules and posts at the time you pick.
How to connect Warp to Slack
- 1
Connect Slack in BrokenPost. Add BrokenPost to your Slack workspace and pick a channel for each post.
- 2
In BrokenPost, open Plugins and copy your MCP URL.
- 3
In Warp, go to Settings > MCP Servers > + Add and paste the config below.
- 4
Sign in to BrokenPost when asked and allow access.
- 5
Ask the agent to schedule a post.
{
"brokenpost": { "url": "<MCP_URL>" }
}What to ask Warp
Type these in Warp. Change the details to fit your messages.
- “Post this weekly update in #team on Slack every Monday at 9am.”
- “Share our launch post in #announcements when it goes live on LinkedIn.”
- “Send this chart to #marketing on Slack tomorrow morning.”
- “Write a Slack message about the file I just shared and schedule it for tomorrow at 9am.”
- “What Slack messages do I have scheduled for next week?”
What happens next
- 1
You ask in Warp, in plain words.
- 2
Warp lists the channels you connected in BrokenPost and picks your Slack account.
- 3
It reads Slack's rules and settings from BrokenPost, so the message fits Slack's limits before it is written.
- 4
If you shared a picture, a video or a link to one, it uploads it to your media library.
- 5
It creates the message as scheduled, as a draft, or to go out now, and gives you a preview link.
- 6
At the set time BrokenPost publishes it to Slack and it shows on your calendar.
Slack limits Warp follows
Warp reads these rules from BrokenPost before it writes, so the message fits the first time.
| Characters | 400,000 characters |
|---|---|
| Media | Pictures (PNG, JPG, GIF), no video |
| Video | Not supported |
| Channel | Pick one per post |
| Replies | Yes |
Slack settings you can ask for
Say them in plain words, like "channel", and Warp sets them on the message.
- Channel
If Slack rejects a message
Warp sees the same message and can fix the message for you.
| What you see | How to fix it |
|---|---|
| No video support for Slack, only images | Remove the video and attach a PNG, JPG or GIF. |
Good to know
- Slack only takes pictures here, not videos.
- Pick the channel in the Slack settings of the post.
- Warp only posts when you ask. Ask for a draft to check the message in BrokenPost first.
Questions people ask
Can Warp post to Slack directly?
Yes, through BrokenPost. Connect Slack in BrokenPost, connect BrokenPost to Warp, and Warp can schedule, draft or publish Slack messages.
Does Warp know the Slack limits?
Yes. Warp reads Slack's rules from BrokenPost before it writes: 400,000 characters and pictures (png, jpg, gif), no video. BrokenPost checks again before it posts.
Can Warp schedule Slack messages for later?
Yes. Give a day and time, like "Friday at 6pm", and the message goes out then. Ask for a draft if you want to check it first.
Is it free?
Warp with BrokenPost works on every plan. The Free plan includes 1 account on every app and 20 posts a month. Paid plans start at $19 a month with unlimited posts.
Which Slack settings can Warp set?
Channel.
Can Warp post a Slack thread or comments?
Yes. Ask for a thread or a first comment and BrokenPost posts each part as a reply, right after the first one.
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