Post to X (Twitter) from Grok Build
Grok Build can post text, images and video on X (Twitter) through ClipSpeed. Add the ClipSpeed server with one config block, sign in, and then ask Grok Build to post text, images and video, pick the time, and apply X (Twitter)'s settings, without leaving xAI's coding agent and CLI.
Keep a human in the loop: Grok Build shows the plan and asks before anything is public. Posting today: YouTube, TikTok, Instagram, X (Twitter) and LinkedIn.
Also try
How to post X (Twitter) from Grok Build
Add ClipSpeed as an HTTP MCP server in Grok Build's configuration, complete the sign-in, and the tools appear. Connect X (Twitter) in ClipSpeed, then describe the post. Setup takes about a minute.
# One-time setup: Grok Build MCP config
{
"mcpServers": {
"clipspeed": { "url": "https://api.clipspeed.ai/mcp" }
}
}
# Then ask Grok Build:
> Post 'Shipped: scheduled posts from any AI agent. Details in the thread' to X
Grok Build: Preview — nothing booked yet. X (Twitter) — text only. Book it?ClipSpeed has not yet run an end-to-end check inside Grok Build. The server is standard MCP over HTTP; the configuration shape above is the common one and Grok Build's documentation is the reference for the file location.
- Add the clipspeed server with the URL to Grok Build's MCP configuration (see its docs for the file location).
- Start Grok Build; complete the ClipSpeed sign-in when prompted, or use an API key header.
- Ask it to list your channels.
- Connect X (Twitter) in the ClipSpeed app, or ask Grok Build for a connect link: it is private, valid for ten minutes, and X (Twitter) signs you in itself.
What can Grok Build do on X (Twitter)?
On X (Twitter), Grok Build can post text, images and video with X's 280-character rule applied at booking. Every booking runs through the same rules as the ClipSpeed app.
Text, Image and Video posts
X (Twitter) takes text, image and video through ClipSpeed. Text-only posts work today. Video: MP4, MOV or WebM up to 1 GB by public link, or a finished ClipSpeed clip. Image: JPG, PNG, WebP or GIF up to 25 MB by public link.
280 characters, checked at booking
X (Twitter)'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 Build books it, or you are told why not and offered the next open slot. A booked X (Twitter) post is never moved behind your back.
Preview before anything posts
preview: true runs the whole booking and writes nothing. Grok Build shows the plan, with each slot and the day's remaining cap, and books only on your yes.
Clips cut in the same session
Submit a video or stream link, get captioned 9:16 clips with a viral score, and post the best as native video on X (Twitter). No download, no re-upload.
Pacing and numbers
Text and image posts on X (Twitter) are at least 30 minutes apart, up to 10 a day. Video on X (Twitter) is at least 2 hours apart, up to 4 a day under your plan. After a post goes out, Grok Build can read back views and engagement where X (Twitter) provides them.
How does Grok Build post to X (Twitter) through ClipSpeed?
You describe what you want in plain language and Grok Build makes the ClipSpeed calls. A typical conversation has three beats.
Find your X (Twitter) channel
Ask Grok Build whether X (Twitter) is connected. It calls list_channels and reads platform_settings, so it also knows what X (Twitter) accepts and the limits before you write a word.
Compose within the rules
Describe the post. Grok Build drafts within X (Twitter)'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.
X (Twitter) settings reference
These are the schedule_post fields that apply to X (Twitter). Mention any of them in plain language and Grok Build sets them; the server checks them at booking.
| Field | Type | Required | What it does on X (Twitter) |
|---|---|---|---|
platforms | string[] | Yes | Include "x". Up to ten platforms per call; each books its own slot. |
text | string | Yes for a text post | Up to 280 characters. Every URL counts as 23 no matter its length; the count is checked at booking. |
hashtags | string[] | No | Appended to the text and counted toward 280. |
media_kind | text | image | video | No | Detected from the file when omitted; text when there is no file. |
clip_id or media_url | string | No | A ClipSpeed clip, or a public https link to an image up to 25 MB or a video up to 1 GB. Leave both out for a text post. |
scheduled_at | ISO 8601 | No | Exact or refused with the next open slot. Omit to post as soon as possible. |
preview | boolean | No | Plan only; returns each slot and the day's remaining cap. |
Common X (Twitter) configurations
Ask Grok Build for any of these and it applies the matching settings.
Plain text post now
Image post at a set time
Clip as native video
Ten posts, one day, previewed
Example prompts for X (Twitter) in Grok Build
Type these into xAI's coding agent and CLI. Grok Build calls ClipSpeed and confirms before publishing.
Post X (Twitter) with a scheduled time
Post 'Shipped: scheduled posts from any AI agent. Details in the thread' to X. Keep the text under 280 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 X (Twitter) at 11am, 3pm and 7pm tomorrow. Show me the plan before booking.
Check and adjust the X (Twitter) calendar
What is scheduled on X (Twitter) this week? Cancel tomorrow's post and tell me the next open X (Twitter) slot on Friday.
X (Twitter) limits and gotchas to know
X (Twitter) enforces a few rules that Grok Build and ClipSpeed respect automatically, but knowing them helps you phrase requests.
- 280 characters, with every link counted as 23. ClipSpeed uses X's arithmetic at booking, so a post that is 290 characters by your editor's count but 275 by X's is accepted, and the reverse is refused with the real number.
- Threads are not a single call. Ask the agent for separate posts or wait for thread support; the page does not claim threads because they do not post today.
- Text posts are spaced 30 minutes apart and capped at ten a day per account; video posts are two hours apart under your plan's video cap. The reply names the next open slot when a time is taken.
- Hashtags count toward the 280. Ask for one or two, not a wall.
- X is one of the two platforms that take text-only posts through the agent tools today (LinkedIn is the other). Everything else needs a clip, an image or a video.
| Rule | X (Twitter) |
|---|---|
| Accepts | Text, Image, Video (text-only posts work today) |
| Text limit | 280 characters; every link counts as 23 |
| Title | No title field |
| Links in the caption | Kept and clickable; every link counts as 23 characters regardless of length |
| Pacing | Text and image posts on X (Twitter) are at least 30 minutes apart, up to 10 a day. Video on X (Twitter) is at least 2 hours apart, up to 4 a day under your plan. |
| Formats | Image: JPG, PNG, WebP or GIF up to 25 MB by public link. Video: MP4, MOV or WebM up to 1 GB by public link, or a finished ClipSpeed clip. Aspect: any; 16:9 or 1:1 reads best in the timeline |
| Status | Posting today |
What Postiz-style schedulers cannot do
Cut the clips first
Grok Build 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 Build picks by score, writes the caption from the transcript, and books the clips on X (Twitter). 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 Build 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 X (Twitter). 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 Build 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 Build?
Grok Build is xAI's coding agent and command-line tool. It runs tasks in your project and can call MCP servers. With ClipSpeed added, it can clip a video, generate media and schedule posts.
How ClipSpeed works with Grok Build
- Connects over HTTP
- Reads platform rules
- Exact-or-refused booking
preview: true- Same tools everywhere
Grok Build vs Grok Bot vs Grok: Grok Build (terminal), Grok Bot (cloud, always on), Grok (x and grok.com). This page is about Grok Build; the Grok Build guide compares them.
{
"mcpServers": {
"clipspeed": {
"url": "https://api.clipspeed.ai/mcp"
// or: "headers": { "Authorization": "Bearer csai_live_..." }
}
}
}# 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
# X (Twitter): text/image/video · text 280 (links = 23)Post to X (Twitter) and other platforms from Grok Build
One request can book the same content to X (Twitter) and other channels, each keeping its own settings and its own slot. Every platform below has its own Grok Build guide.
Also works with
X (Twitter) and Grok Build: frequently asked questions
How do I post to X (Twitter) from Grok Build?
Add the clipspeed server with the URL to Grok Build's MCP configuration (see its docs for the file location). Start Grok Build; complete the ClipSpeed sign-in when prompted, or use an API key header. Connect X (Twitter) in ClipSpeed (or ask Grok Build for a connect link; it is private and valid for ten minutes), then describe the post in plain language. Grok Build reads the X (Twitter) rules, drafts within them, shows the plan and books on your yes.
What can Grok Build post to X (Twitter) through ClipSpeed?
Post text, images and video with X's 280-character rule applied at booking. X (Twitter) takes text, image and video posts, and text-only posts work today. Text is limited to 280 characters, with every link counted as 23.
Which X (Twitter) settings can Grok Build control?
The fields in the settings reference above: text, hashtags, 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 Build sets the matching field before it books.
Do I need a X (Twitter) API key or developer account?
No. You connect X (Twitter) to ClipSpeed once through X (Twitter)'s own sign-in, and Grok Build talks to ClipSpeed over OAuth. No X (Twitter) developer key, bearer token or password is pasted anywhere.
How many X (Twitter) posts a day can Grok Build schedule?
Text and image posts on X (Twitter) are at least 30 minutes apart, up to 10 a day. Video on X (Twitter) is at least 2 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 posts go out to X (Twitter) while I am away?
Yes. Once booked, ClipSpeed publishes at the scheduled minute whether or not Grok Build is open. For unattended runs that decide what to post, use a headless agent such as Claude Code or Codex with the same account.
Is posting to X (Twitter) from Grok Build different from Grok Bot?
The booking is identical: the same rules, the same calendar, the same refusals. What differs is where you work. Grok Build: terminal. Grok Bot: cloud, always on, routines on a cloud computer.