Example prompt
“Write a Facebook post for our Page about the new winter hours, with the shopfront photo from our media library. Schedule it for Monday at 7am, held for my review.”
Grok + Wahlu
Post to Facebook from Grok with Wahlu
Connect Grok to Wahlu once, then plan, draft and schedule posts for Facebook Pages connected to Wahlu from a conversation. Every schedule can wait for your approval.
Page post
One image or video with a caption.
Reel
One vertical video.
Story
One image or video. Stories don't take a caption.
Ask Grok for Facebook posts
Example prompts and the steps to expect. These are illustrations, not recorded conversations.
Example prompt
“Turn this clip into a Facebook Reel and a matching Story for Thursday. Keep the Reel caption short.”
Example prompt
“List what's scheduled on our Facebook Page this month and tell me which weeks have nothing.”
What Wahlu does on Facebook
Grok works through Wahlu's tools, so it can set the Facebook options Wahlu supports.
Facebook settings on a draft
- Post type
- Page post, Reel or Story.
Wahlu posts to Facebook Pages, not personal profiles or groups, and a Page post carries one image or video rather than an album.
The tool calls, in order
- 01
list_targetsFinds the brand's connected Facebook account and checks it's ready. - 02
import_media_from_url,upload_mediaorlist_mediaBrings in the image or video, or picks one from your media library. - 03
create_draftCreates the draft with its caption andfacebook_settings, such as the post type. - 04
preflight_draftChecks the draft against Facebook's rules without changing it. - 05
create_schedulePuts it on the calendar atpending_review, held for your approval.
Facebook limits to know
Wahlu checks these before a post is scheduled, so the agent finds out early.
Page photos can be JPEG, BMP, PNG, GIF or TIFF, up to 10 MB.
Graph API: Page photosReels are 9:16 video between 3 and 90 seconds. Wahlu keeps Reel captions to 2,200 characters.
Meta: Reels publishingStory videos are 9:16, at least 540 × 960, between 3 and 60 seconds.
Meta: Page Stories APIMeta documents no caption limit for Page posts through the API; Wahlu uses Facebook's own composer limit of 63,206 characters.
Graph API: Page photos
Getting images and video to Facebook
The hosted connection can't open files on your computer. Give the agent a public link to import, pick from your brand's media library, or attach an image the agent can pass on as data. For video, a public link or your media library is usually easiest.
Connect Grok to Wahlu
Set this up once and Grok can work on every network you've connected, not just Facebook.
- 1
Go to grok.com/connectors.
- 2
Click New Connector, then select Custom.
- 3
Paste
https://mcp.wahlu.com/mcpas the MCP server URL. - 4
Sign in to Wahlu when asked, then choose the workspace, brands and permissions Grok can use.
Checked against the xAI docs: Connectors on 3 November 2026. Menus can change; if a step doesn't match what you see, follow the vendor's current instructions.
xAI's documentation describes this on grok.com. On Grok Business and Enterprise plans, a team admin first adds the connector in the xAI console (console.x.ai, Grok Business → Connectors → + Add Connector → Other); members then connect it on grok.com/connectors. Grok signs in with dynamic client registration, which Wahlu accepts for Grok.
You stay in control.
Every Wahlu plan and the $1 trial include agent access, through MCP and the API. You choose the workspace, brands and permissions each connection gets, and can disconnect it at any time.
Held until you approve
Agents create schedules at pending_review unless you've told them to publish. A held schedule can't publish until you approve it in Wahlu or ask an agent with Publishing permission to approve it.
Publishing is its own permission
Publishing is separate from Manage your schedule. Leave it unticked and nothing your agent schedules can go out on its own.
Checked before it's scheduled
preflight_draft reports anything that would stop a post, such as media the network won't accept or a caption that's too long, without changing anything. Autopilot's lines to check reach your agent too, and approving past them takes an explicit acknowledgement.
Some things stay in the app
Use the app for queues, draft media and platform settings, and connecting social accounts. Agents can change the name or caption of an unused draft and approve held schedules with the right permissions.
Keep going
Other networks from Grok
Your next Facebook post, drafted by Grok.
Connect your Facebook account in Wahlu, then give Grok a specific brief.