Hermoso is a marketing MCP server: 876+ 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. Perplexity Computer reaches all of it through one connection. This page covers one slice of that: what Perplexity Computer can actually do on Facebook, and what Facebook will not let it do.
Connect Hermoso to Perplexity Computer
- Copy the connector URL.
https://app.hermoso.ai/mcp - Perplexity → Customize → Connectors. In the left sidebar open Customize, then the Connectors tab → Custom connector → Add MCP connector.
- Fill in the connector. Name it Hermoso and paste the URL. Under Advanced: Authentication OAuth with Client ID and Client Secret left empty, Transport Streamable HTTP, Network access Public. Tick the risk notice and press Add.
- Sign in. On the Hermoso card click + and approve on the Hermoso consent page with your Hermoso account.
- Give Computer the job. Start a Computer task and name Hermoso in it. Perplexity’s changelog says custom connectors feed both conversations and Computer workflows, so the connector you just added is the one Computer calls.
- Ask Computer 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.
Custom connectors, and Computer itself, are on Perplexity’s paid plans: Pro, Max and Enterprise. Computer runs on Perplexity’s own credits, which are separate from Hermoso’s. In an Enterprise organization, member-added connectors stay off until an admin allows them. We ran the connector setup end to end from a Perplexity Pro account on 2026-09-28; the Computer step is documented by Perplexity rather than run here. Hermoso is not affiliated with or endorsed by Perplexity.
Then connect Facebook 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 Facebook tools Perplexity Computer gets
post_to_meta: publishes text, an image, a video or a multi-photo post to the Page, and takespageIdso it never has to guess which Page.schedule_post: queues the same post for a time you choose, on one calendar shared with every other channel.list_meta_pages: lists the Pages the account has connected, with their ids.manage_meta_post: edits the copy of a published post, or deletes it.list_meta_comments / reply_to_meta_comment / moderate_meta_comment: reads the comments under a post, replies as the Page, and hides or deletes what should not be there.meta_page_insights / meta_post_insights: Page-level and per-post reach, impressions and engagement.upload_meta_asset: puts a finished render into the ad account’s asset library.
Facebook is also the one channel with native remote scheduling. post_to_meta takes a scheduleAt between ten minutes and thirty days out and hands the timing to Meta itself. Instagram and Threads have no such thing in Meta’s API, and passing it for them is refused rather than quietly posted immediately.
Facebook limits worth knowing before you automate anything
| Text | A Facebook post can run to 63,206 characters, which is effectively no limit. 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 or draft. A draft is a genuinely unpublished Page post, which is the useful one for review: it exists in Meta Business Suite and nobody outside can see it. There is no unlisted and no private option: “a Facebook Page post is either published or held as an unpublished draft”. |
| Carousel | 2 slides and up, photos only. Meta publishes no maximum for attached_media that we could source, so Hermoso does not invent one and attribute it to Facebook. The only bound is ours, at 30 slides, and the refusal says whose it is: “Facebook publishes no documented maximum for attached_media, so this bound is ours, not theirs.” Video cannot ride in a Facebook photo carousel; that is a different edge on Meta’s API and Hermoso refuses rather than silently dropping the clip. |
| Which account | pageId. It matters the moment a brand connects more than one Page: the publish path refuses by name instead of picking one for you, and a schedule that could not carry the answer would turn that refusal into a failure hours later with nobody watching. |
Try it in Perplexity Computer
Ask for it in ordinary language. These are plain sentences, not a DSL:
“Research what the longest-running Facebook ads in our category have in common, make two image ads from that angle, and hold both on our Page as drafts.”
That walks find_competitors → search_meta_ads → plan_ad → render_ad → list_meta_pages → post_to_meta. How often Computer checks in is Perplexity’s setting, not ours. Hermoso’s gates hold either way: campaigns are born paused, spend switches and deletes need an explicit confirmation, and every render is priced before it runs.
Perplexity Computer on Facebook: the part that bites
A Computer task runs its subtasks without you, so end it on a draft. A Facebook draft is a real unpublished Page post you can read in Business Suite, and search_meta_ads reads the Meta Ad Library directly, so the angle rests on what competitors pay to run rather than on articles about them.
Computer’s sandbox can run code, so it could drive the hermoso command line as well, but the connector is the simpler path: it signs in with OAuth, keeps no key in the sandbox, and reaches the same tools. Pick Streamable HTTP, not SSE, when you add it, because Hermoso has no SSE endpoint.
Research Facebook before you post
The Meta Ad Library is the richest public creative archive there is, and search_meta_ads reads it by keyword or by page, covering both Facebook and Instagram placements. pull_competitor_ads and competitor_teardown build on it, and find_competitors works out who to point them at.
The paid half
Facebook is the deepest paid surface Hermoso has. create_meta_campaign, create_meta_adset and create_meta_ad build the whole tree with real targeting: geography down to a city radius, interests, behaviours, custom audiences and lookalikes, placements, dayparting, bid and cost caps. Everything is created PAUSED with no caller override, and the summary your agent reports is built from a read-back of what Meta actually stored, never from what was requested. Before a budget is committed, preview_meta_ad renders the real ad per placement as a link you can look at and estimate_meta_reach says how many people the targeting actually reaches. One warning that saves money: an ad set created with no locations defaults to the United States only, and the read-back says so loudly.
What Perplexity Computer 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 Perplexity Computer, post to: Instagram · Threads · TikTok · YouTube · X · LinkedIn · Pinterest · Bluesky · Telegram. Or see everything Perplexity Computer can publish to.
Post to Facebook from: Claude · ChatGPT · Claude Code · Cursor · Codex · Cline · OpenClaw · Grok Bot · Hermes · Gemini CLI · Perplexity · Le Chat · Claude Cowork · Paperclip · Hermoso in Perplexity chat
Frequently asked questions
Can Perplexity Computer post to Facebook?
Yes, through Hermoso's MCP server. In Perplexity, add https://app.hermoso.ai/mcp as a custom remote connector with OAuth and approve it with your Hermoso account. Computer tasks use the same connector, and there is no key to paste. Perplexity Computer then has 876+ tools, including the ones that publish to Facebook, plus the ones that research the ads already running in your market and render the creative in the first place.
How do I connect Facebook to Perplexity Computer?
Two steps, once each. In Perplexity, add https://app.hermoso.ai/mcp as a custom remote connector with OAuth and approve it with your Hermoso account. Computer tasks use the same connector, and there is no key to paste. Then connect Facebook inside Hermoso under Settings → Connectors, which is an OAuth consent screen in a browser. After that Perplexity Computer publishes to Facebook as an ordinary tool call.
Can Perplexity Computer post a carousel to Facebook?
Yes, as a Facebook multi-photo post: two slides and up, photos only. Meta publishes no maximum for it that we could source, so Hermoso applies its own bound of 30 slides and says the bound is ours rather than attributing it to Facebook. Perplexity Computer calls the same publish tool either way, and a channel that cannot carry a carousel is refused with the real reason attached.
Can Perplexity Computer run Facebook ads as well as posting?
Yes. The full Meta campaign tree is buildable (campaign, ad set, ad, targeting, audiences, budgets), with preview and reach-estimate tools before a budget is committed.
Does Perplexity Computer need my Facebook password?
No. You connect Facebook to Hermoso once through an OAuth consent screen in a browser, and Perplexity Computer then reaches it as a tool call. Linking an account is the one step that is not headless; nothing after it needs a password, and no credential is ever handed to the model.
Can Perplexity Computer research Facebook before it posts?
Yes. The Meta Ad Library is searchable through search_meta_ads by keyword or by page, and it covers Facebook and Instagram placements together.
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