Post to Mastodon from Grok Bot
Grok Bot can post to Mastodon on Mastodon through ClipSpeed. Add the ClipSpeed connector, sign in, and then ask Grok Bot to post to Mastodon, pick the time, and apply Mastodon's settings, without leaving always-on Bots with their own cloud computer. Mastodon is on the roadmap on ClipSpeed's rail; this page describes how it works and says so.
Keep a human in the loop: Grok Bot shows the plan and asks before anything is public. Posting today: YouTube, TikTok, Instagram, X (Twitter) and LinkedIn.
Also try
How to post Mastodon from Grok Bot
ClipSpeed's Grok Bot plugin is in progress. Until it lands, a Bot that can register an MCP server can add the ClipSpeed URL; a Bot that only installs plugins waits for the plugin. Connect Mastodon in ClipSpeed, then describe the post. Setup takes about a minute.
# One-time setup: Bot chat
Add the ClipSpeed MCP server at https://api.clipspeed.ai/mcp and sign me in. Then list my connected channels.
# Then ask Grok Bot:
> Post the announcement to Mastodon at 9am
Grok Bot: Preview — nothing booked yet. Mastodon — text under 500. Book it?Status: coming. The plugin is in progress and ClipSpeed has not verified Grok Bot end to end. The badge on this page changes when either happens.
- In a Bot chat, ask it to add the ClipSpeed MCP server at https://api.clipspeed.ai/mcp.
- Complete the sign-in link it sends back, or store a ClipSpeed API key as a Bot secret.
- Ask the Bot to list your channels.
- Connect Mastodon in the ClipSpeed app, or ask Grok Bot for a connect link: it is private, valid for ten minutes, and Mastodon signs you in itself.
What can Grok Bot do on Mastodon?
On Mastodon, Grok Bot can post 500-character text, images and video to a Mastodon account on any server. Every booking runs through the same rules as the ClipSpeed app.
Text, Image and Video posts
Mastodon takes text, image and video through ClipSpeed. Video: MP4 or WebM. Image: JPG, PNG or GIF; up to four per post on Mastodon.
500 characters, checked at booking
Mastodon's own arithmetic, with every link counted as 23. Too long is refused with the real count, never trimmed at send time.
Exact time or refused
Name the minute and Grok Bot books it, or you are told why not and offered the next open slot. A booked Mastodon post is never moved behind your back.
Preview before anything posts
preview: true runs the whole booking and writes nothing. Grok Bot shows the plan, with each slot and the day's remaining cap, and books only on your yes.
Clips cut in the same chat
Submit a video or stream link, get captioned 9:16 clips with a viral score, and post the best as native video on Mastodon. No download, no re-upload.
Pacing and numbers
Planned: Text posts on Mastodon are at least 30 minutes apart, up to 10 a day. Video on Mastodon is at least 4 hours apart, up to 4 a day under your plan. After a post goes out, Grok Bot can read back views and engagement where Mastodon provides them.
How does Grok Bot post to Mastodon through ClipSpeed?
You describe what you want in plain language and Grok Bot makes the ClipSpeed calls. A typical conversation has three beats.
Find your Mastodon channel
Ask Grok Bot whether Mastodon is connected. It calls list_channels and reads platform_settings, so it also knows what Mastodon accepts and the limits before you write a word.
Compose within the rules
Describe the post. Grok Bot drafts within Mastodon's limits, counting links as 23; mention a clip or a file and it attaches it.
Schedule or publish
Name a time, or say now. The slot is booked exactly or refused with the next open one, and the reply carries the id you can cancel or edit by.
Mastodon settings reference
These are the schedule_post fields that apply to Mastodon. Mention any of them in plain language and Grok Bot sets them; the server checks them at booking. Fields marked planned land with the Mastodon release.
| Field | Type | Required | What it does on Mastodon |
|---|---|---|---|
platforms | string[] | Yes | Include "mastodon". Up to ten platforms per call; each books its own slot. |
text | string | Yes for a text post | Up to 500 characters on a default server; links count as 23. |
visibility | public | unlisted | followers | Planned | Mastodon's post visibility. |
media_kind | text | image | video | No | Detected from the file when omitted. |
clip_id or media_url | string | No | A clip or a public link. |
scheduled_at | ISO 8601 | No | Exact or refused with the next open slot. |
preview | boolean | No | Plan only. |
Common Mastodon configurations
Ask Grok Bot for any of these and it applies the matching settings.
Public post
Unlisted test
Clip as video
Day of posts, previewed
Example prompts for Mastodon in Grok Bot
Type these into always-on Bots with their own cloud computer, or pass one to routine in a script. Grok Bot calls ClipSpeed and confirms before publishing.
Post Mastodon with a scheduled time
Post the announcement to Mastodon at 9am. Keep the text under 500 characters with links counted as 23. Preview first.
Cut the clips, then post the best
Clip this link, keep the top three by viral score, and schedule them to Mastodon at 11am, 3pm and 7pm tomorrow. Show me the plan before booking.
Check and adjust the Mastodon calendar
What is scheduled on Mastodon this week? Cancel tomorrow's post and tell me the next open Mastodon slot on Friday.
Mastodon limits and gotchas to know
Mastodon enforces a few rules that Grok Bot and ClipSpeed respect automatically, but knowing them helps you phrase requests.
- 500 characters is the default limit, with every link counted as 23. Some servers allow more; ClipSpeed will use your server's limit at booking.
- Your account lives on one server; you connect that server, not mastodon.social in general.
- Mastodon is on ClipSpeed's roadmap, not the next rail. Bookings are refused plainly until it posts.
- Content warnings and alt text are planned fields.
- Planned pacing: ten text posts a day 30 minutes apart, video four hours apart.
| Rule | Mastodon |
|---|---|
| Accepts | Text, Image, Video |
| Text limit | 500 characters; every link counts as 23 (500 is the default; your server may allow more) |
| Title | No title field |
| Links in the caption | Kept; every link counts as 23 characters |
| Pacing | Planned: Text posts on Mastodon are at least 30 minutes apart, up to 10 a day. Video on Mastodon is at least 4 hours apart, up to 4 a day under your plan. |
| Formats | Image: JPG, PNG or GIF; up to four per post on Mastodon. Video: MP4 or WebM. Aspect: any |
| Status | On the roadmap; described here, not yet bookable |
What Postiz-style schedulers cannot do
Cut the clips first
Grok Bot does not need finished video to start. Hand it a YouTube link, a podcast, a stream VOD or a local export. ClipSpeed finds the moments, cuts them to 9:16 with word-by-word captions, scores each one 0 to 100 for shareability, and returns them in the same conversation. Grok Bot picks by score, writes the caption from the transcript, and books the clips on Mastodon. Three tool calls, one approval, no download and no re-upload.
- Clips arrive with a title written from the hook, a transcript and a viral score, so the agent can choose and caption without watching the footage.
- Live streams can be clipped while they are still on air; the agent books the highlights for the next morning before the stream ends.
- Every clip is already hosted, so
schedule_posttakes its id directly. Nothing moves through your laptop.
submit_to_clipspeedPaste the link. ClipSpeed starts the job and returns a project id.check_clipsPoll with the project id. Back come the finished 9:16 clips with titles, transcripts, viral scores and preview links.schedule_postPass the clip id, the platforms, a caption and a time. Grok Bot shows the plan with preview: true, you say yes, it books.generate_image or generate_videoDescribe the shot. ClipSpeed runs it on the model that fits (Seedance, Kling, Veo, Nano Banana Pro, GPT Image and others) and quotes the credits first.wait_for_generationReturns the hosted result link and a preview the agent can show you.schedule_post with media_urlThe result link goes straight into the booking on Mastodon. The caption, the time and the file are approved together.The other half nobody else has
Generate the image or video, then post it
A product shot for Instagram, a 16:9 announcement graphic for X, a six-second opener before a clip: Grok Bot can make an image or a short video with ClipSpeed's image and video models and book the result in the same reply. There is no separate design tool, no export, no upload page. The generated file is hosted, so media_url is the only thing the booking needs.
- The price in credits is quoted before anything renders, within the per-generation and daily caps you set in Settings.
- Results are previewed in the conversation, so you approve the picture and the post at once.
- Images post as JPG, PNG or WebP up to 25 MB; video posts as MP4, MOV or WebM up to 1 GB.
What is Grok Bot?
Grok Bot is the always-on agent product from xAI and Cursor. You create named Bots with a job; each runs on its own persistent cloud computer with a browser, a filesystem and a terminal, and asks you for approval before changing outside systems. ClipSpeed is building a plugin for it; where a Bot can add an MCP server, the ClipSpeed URL works today.
How ClipSpeed works with Grok Bot
- The Bot gains the ClipSpeed tools by plugin or MCP
- Reads platform rules
- Exact-or-refused booking
preview: truefor routines that report first- Approvals keep a human in the loop
Grok Bot vs Grok Build vs Grok: Grok Bot (cloud, 24/7), Grok Build (terminal), Grok (x and grok.com). This page is about Grok Bot; the Grok Bot guide compares them.
Routine: evening-clips
Schedule: daily 23:00
Do: Clip today's stream VOD with ClipSpeed, keep the top three by score,
schedule them to TikTok and YouTube Shorts tomorrow at 11:00, 15:00
and 19:00 with preview first, and message me the plan for approval.# What the agent reads at connect time (tool descriptions, abridged)
list_channels Connected platforms, what each accepts, limits, your time zone
connect_channel A private 10-minute link to connect one platform
platform_settings Limits, title rules, link handling, pacing per platform
schedule_post clip_id | text | media_url → platforms[], scheduled_at, preview
list_scheduled_posts Scheduled, sending, posted, failed — with post links
update_scheduled_post Edit copy while still scheduled (the time never moves)
cancel_scheduled_post Cancel; undoable 72 h in the app
post_analytics Views, likes, comments, shares where the platform gives them
submit_to_clipspeed Start clipping a video or stream link → projectId
check_clips Finished 9:16 clips with titles, transcripts, viral scores
generate_image / generate_video / wait_for_generation
# Mastodon: text/image/video · text 500 (links = 23)Post to Mastodon and other platforms from Grok Bot
One request can book the same content to Mastodon and other channels, each keeping its own settings and its own slot. Every platform below has its own Grok Bot guide.
Also works with
Mastodon and Grok Bot: frequently asked questions
How do I post to Mastodon from Grok Bot?
In a Bot chat, ask it to add the ClipSpeed MCP server at https://api.clipspeed.ai/mcp. Complete the sign-in link it sends back, or store a ClipSpeed API key as a Bot secret. Connect Mastodon in ClipSpeed (or ask Grok Bot for a connect link; it is private and valid for ten minutes), then describe the post in plain language. Grok Bot reads the Mastodon rules, drafts within them, shows the plan and books on your yes. Mastodon is on the roadmap; until the badge changes, the booking is refused with a plain message.
What can Grok Bot post to Mastodon through ClipSpeed?
Post 500-character text, images and video to a Mastodon account on any server. Mastodon takes text, image and video posts. Text is limited to 500 characters, with every link counted as 23.
Which Mastodon settings can Grok Bot control?
The fields in the settings reference above: text, visibility, media_kind, clip_id or media_url, scheduled_at, preview. Mention any of them in plain language ("unlisted", "tomorrow at 9", "preview first") and Grok Bot sets the matching field before it books.
Do I need a Mastodon API key or developer account?
No. You connect Mastodon to ClipSpeed once through Mastodon's own sign-in, and Grok Bot talks to ClipSpeed over OAuth. No Mastodon developer key, bearer token or password is pasted anywhere.
How many Mastodon posts a day can Grok Bot schedule?
Planned: Text posts on Mastodon are at least 30 minutes apart, up to 10 a day. Video on Mastodon is at least 4 hours apart, up to 4 a day under your plan. When a time is taken, the booking is refused with the next open slot rather than moved. Ask for preview to see a day's plan and the remaining cap before anything is booked.
Can Grok Bot post to Mastodon from a script or a cron job?
Yes. Grok Bot's headless mode (routine) runs one prompt and exits, and the ClipSpeed server registered on that machine does the booking. On a runner with no browser, authenticate with a ClipSpeed API key header. Keep preview on so the run reports a plan before it books.
Is posting to Mastodon from Grok Bot different from Grok Build?
The booking is identical: the same rules, the same calendar, the same refusals. What differs is where you work. Grok Bot: in the cloud, on routines; chat from desktop and iphone. Grok Build: terminal, coding agent.