Example prompt
“Here are four photos from Saturday's market. Make an Instagram carousel with a short caption and no more than five hashtags, and hold it for my review on Friday at 8am.”
ChatGPT + Wahlu
Post to Instagram from ChatGPT with Wahlu
Connect ChatGPT to Wahlu once, then plan, draft and schedule posts for Instagram professional accounts (Business or Creator) connected to Wahlu from a conversation. Every schedule can wait for your approval.
Feed post
One to 10 images or videos. Two or more make a carousel.
Reel
One video, with a caption.
Story
One image or video. Stories don't take a caption.
Ask ChatGPT for Instagram posts
Example prompts and the steps to expect. These are illustrations, not recorded conversations.
Example prompt
“Turn this video into a Reel for Tuesday evening, add @northroasters as a collaborator and leave the schedule for me to approve.”
Example prompt
“What's on Instagram for this brand next week? Find the quiet day and draft a Story to fill it.”
What Wahlu does on Instagram
ChatGPT works through Wahlu's tools, so it can set the Instagram options Wahlu supports.
Instagram settings on a draft
- Post type
- Feed post, Reel or Story.
- Collaborators
- Invite up to five accounts by their handle.
- Trial Reel
- Share a Reel with non-followers first, then share it to followers yourself or let Instagram decide based on how it performs.
Wahlu doesn't add a first comment, location or tagged people to Instagram posts.
The tool calls, in order
- 01
list_targetsFinds the brand's connected Instagram 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 andinstagram_settings, such as the post type. - 04
preflight_draftChecks the draft against Instagram's rules without changing it. - 05
create_schedulePuts it on the calendar atpending_review, held for your approval.
Instagram limits to know
Wahlu checks these before a post is scheduled, so the agent finds out early.
Captions up to 2,200 characters, with no more than 30 hashtags and 20 @ mentions.
Instagram Graph API: IG User mediaInstagram now uses up to five hashtags on a post, so Wahlu warns above five.
Instagram @creators, 19 December 2025Feed images must be JPEG, up to 8 MB, between 4:5 and 1.91:1.
Instagram Graph API: IG User mediaReels: up to 300 MB and between 3 seconds and 15 minutes.
Instagram Graph API: IG User mediaStory videos: up to 100 MB and between 3 and 60 seconds.
Instagram Graph API: IG User media
Getting images and video to Instagram
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 ChatGPT to Wahlu
Set this up once and ChatGPT can work on every network you've connected, not just Instagram.
- 1
On chatgpt.com, open Settings → Security and login and turn on Developer mode.
- 2
Go to chatgpt.com/plugins and select the + button.
- 3
Name it Wahlu, paste
https://mcp.wahlu.com/mcpas the MCP server URL and choose OAuth if asked how to authenticate. - 4
Create the connection and sign in to Wahlu when asked.
- 5
Start a new conversation and add Wahlu from the tools menu.
Checked against the OpenAI developer docs on 24 September 2026. Menus can change; if a step doesn't match what you see, follow the vendor's current instructions.
Set this up on the ChatGPT website; the desktop apps don't have developer mode. Whether developer mode is available depends on your ChatGPT plan and workspace settings, and a workspace admin may need to allow it.
You stay in control.
Every Wahlu plan includes 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 the Wahlu calendar.
Publishing is its own permission
Publish to social accounts 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.
Some things stay in the app
Queues, general edits to existing drafts, approvals and connecting social accounts happen in the Wahlu app, not through your agent.
Keep going
Other networks from ChatGPT
Your next Instagram post, drafted by ChatGPT.
Connect your Instagram account in Wahlu, then give ChatGPT a specific brief.