Hermoso is a marketing MCP server: 922+ tools over one OAuth’d endpoint that let an agent research the ads already running in a market, generate finished image and video ads, publish them, and build the paid campaigns behind them. ChatGPT reaches all of it through one connection. This page covers one slice of that: what ChatGPT can actually do on Instagram, and what Instagram will not let it do.
Connect Hermoso to ChatGPT
- Open Hermoso in ChatGPT’s app directory. Hermoso in the ChatGPT app directory, or search for Hermoso under Plugins in the ChatGPT sidebar.
- Add it, connect and approve. Click Add, then sign in with your Hermoso account when the consent page opens. There is no key to paste.
- Ask ChatGPT for something. “Pull my three closest competitors’ longest-running ads and remix the best hook into a 9:16 video,” or “post this render to the channel.” The agent picks the tools; you approve the spend.
Prefer to add it by hand? Developer mode still works: Plugins → Add → Create MCP App, Server URL https://app.hermoso.ai/mcp, Authentication OAuth. It is the same endpoint every other client uses.
Then connect Instagram itself, once, under Settings → Connectors in Hermoso. That is an OAuth consent screen, so it is the one step that needs a browser. Everything after it is a tool call.
The Instagram tools ChatGPT gets
post_to_meta: publishes to Instagram withtarget: "instagram". Instagram is a visual channel and the API agrees: a post needs an image or a video.schedule_post: queues it on the shared calendar, with a per-channel caption if the copy should differ from your Facebook or LinkedIn version.list_meta_comments / reply_to_meta_comment / moderate_meta_comment: read, reply and moderate under a post.meta_page_insights / meta_post_insights: reach, impressions, saves and engagement, per account and per post.search_instagram: keyword search across public Instagram Reels, for research rather than publishing.
Two Instagram facts worth knowing before you automate anything. There is no native Instagram scheduling in Meta’s API, so a schedule is Hermoso’s queue rather than Instagram’s, and passing Facebook’s scheduleAt for Instagram is refused rather than silently posted now. And an Instagram caption cannot be edited once the post is live: the only thing Meta lets you change on a published post is whether comments are enabled. Deleting one is supported: manage_meta_post removes ordinary posts, Stories, Reels and entire carousel albums, though never a single card out of an album.
Instagram limits worth knowing before you automate anything
| Text | An Instagram caption is capped at 2,200 characters. It is enforced when the post is created or queued, so an overlong post is refused while you are still there to fix it instead of being silently cut on the way out. |
|---|---|
| Visibility | Public only. Meta’s Content Publishing API publishes immediately or not at all, and Instagram “has no unlisted, private or draft post.” If you want a review step on Instagram, it has to happen before the call, not after. |
| Carousel | 2 to 10 slides, and images and video may be mixed. That upper bound is Meta’s own, quoted in the capability table it enforces: “Carousels are limited to 10 images, videos, or a mix of the two.” The floor of 2 is ours, because one slide is not a carousel on any platform. A single-slide ask publishes as an ordinary post rather than being refused. |
| Which account | pageId. Instagram publishes through the connected Facebook Page, so the same identity field selects it. |
Try it in ChatGPT
Ask for it in ordinary language. These are plain sentences, not a DSL:
“Look at what is working in skincare Reels right now, then build a 9:16 video ad and a 5-slide carousel from the same angle and post the carousel to Instagram.”
That walks search_instagram → plan_ad → render_ad → post_to_meta (target: "instagram"). Tool calls run in the chat and you approve them there, so nothing publishes without you seeing the caption first.
ChatGPT on Instagram: the part that bites
Two things to hold in mind. Instagram takes an image or a video (there is no text-only post), and once something is published the caption is final, because Meta lets you change nothing on a live post except whether comments are on. You can still take the whole post down with manage_meta_post. So the moment to check the caption is while it is still in the chat. If Create MCP App is missing in ChatGPT, that is the Developer mode toggle under Settings → Plugins → Developer mode, not anything at our end.
ChatGPT is the only client that renders Hermoso’s inline widgets; anywhere else the same tools return plain structured results.
Research Instagram before you post
search_meta_ads covers Instagram placements as well as Facebook, since it is one library. For organic, search_instagram searches public Reels by keyword, which is the surface where the format actually moves; profile and hashtag pulls go through fetch_social_data and search_instagram_hashtag.
The paid half
Instagram placements are bought through the same Meta campaign tree as Facebook: create_meta_campaign → create_meta_adset → create_meta_ad, with placements selectable per platform and position. preview_meta_ad shows the real rendered ad per placement before you spend, and meta_insights breaks results down by age, gender, placement and country. That breakdown is what shapes the next creative.
What ChatGPT cannot do on its own
An agent with a budget is only useful if the blast radius is bounded, so the fence is in the server rather than in a prompt. Every ad campaign, ad set, ad group and ad is created paused, and the status switches that arm real money refuse to run without an explicit confirmation flag. Every render is quoted first (hermoso_capabilities publishes each model’s exact credit cost before anything spends). Credits are reserved before the first provider call and settled at the exact cost afterwards, so a failed dispatch refunds rather than leaving you billed for nothing. Deletes are confirm-gated too, and every campaign tree is read back from the ad platform before your agent tells you what it built.
One step is deliberately not headless: linking an account is an OAuth consent screen, so you connect the channel once in a browser. Everything after that is a tool call.
The rest of the matrix
From ChatGPT, post to: Facebook · Threads · TikTok · YouTube · X · LinkedIn · Pinterest · Bluesky · Telegram. Or see everything ChatGPT can publish to.
Post to Instagram from: Claude · Claude Code · Cursor · Codex · Cline · OpenClaw · Grok Bot · Hermes · Gemini CLI · Perplexity · Le Chat · Claude Cowork · Perplexity Computer · Paperclip
Frequently asked questions
Can ChatGPT post to Instagram?
Yes, through Hermoso's MCP server. In ChatGPT, add https://app.hermoso.ai/mcp as a custom connector and approve it with your Hermoso account. There is no key to paste. ChatGPT then has 922+ tools, including the ones that publish to Instagram, plus the ones that research the ads already running in your market and render the creative in the first place.
How do I connect Instagram to ChatGPT?
Two steps, once each. In ChatGPT, add https://app.hermoso.ai/mcp as a custom connector and approve it with your Hermoso account. There is no key to paste. Then connect Instagram inside Hermoso under Settings → Connectors, which is an OAuth consent screen in a browser. After that ChatGPT publishes to Instagram as an ordinary tool call.
Can ChatGPT post privately or as a draft to Instagram?
No. Instagram’s Content Publishing API publishes or does nothing. There is no unlisted, private or draft post. A published caption also cannot be edited; the only field Meta lets you change on a live post is whether comments are enabled. Deleting a post is supported, and covers ordinary posts, Stories, Reels and entire carousel albums. Hermoso refuses a visibility Instagram cannot honour at the moment you ask for it, rather than quietly publishing something weaker.
Can ChatGPT research Instagram before it posts?
Yes. search_meta_ads covers Instagram placements in the Meta Ad Library, and search_instagram searches public Reels by keyword.
What is the Instagram caption limit when posting from ChatGPT?
An Instagram caption is capped at 2,200 characters, and the limit is enforced when the post is queued rather than when it fires. Hermoso enforces it when the post is created or queued, so ChatGPT is told immediately rather than failing later when nobody is watching.
Can ChatGPT run Instagram ads as well as posting?
Yes, through the Meta campaign tree. Instagram placements are selected inside a Meta ad set. preview_meta_ad renders the real ad per placement before you spend.
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