Hermoso is a marketing MCP server: 912+ 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 reaches all of it through one connection. This page covers one slice of that: what Perplexity can actually do on LinkedIn, and what LinkedIn will not let it do.
Connect Hermoso to Perplexity
- Copy the connector URL.
https://app.hermoso.ai/mcp - Perplexity → Customize → Connectors. In the left sidebar open Customize, then the Connectors tab → Custom connector (top right) → Add MCP connector.
- Fill in the connector. Name it Hermoso and paste the URL as the MCP server URL. Expand Advanced: Authentication OAuth, leaving Client ID and Client Secret empty (Perplexity reads Hermoso’s OAuth endpoints from its discovery document and identifies itself with its own client metadata, so there is nothing to create or paste), Transport Streamable HTTP, Network access Public. Tick I understand custom connectors can introduce risks and press Add.
- Sign in. On the Hermoso card click + (Add connector) and approve on the Hermoso consent page with your Hermoso account.
- Switch it on in a chat. A custom connector is off until you pick it: + (Add files or tools) → Connectors → tick Hermoso.
- Ask Perplexity 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 are on Perplexity’s paid plans. In an Enterprise organization, members can add their own only if an admin has switched on Allow members to add custom connectors, which is off by default, and an admin can instead add Hermoso once for everyone. We ran these steps end to end on 2026-09-28 from a Perplexity Pro account: the connector signed in and answered with the account’s credit balance and brand list. Hermoso is not affiliated with or endorsed by Perplexity.
Then connect LinkedIn 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 LinkedIn tools Perplexity gets
post_to_linkedin_page: publishes text, an image, a video or a multi-image post to a company Page, with alt text.post_to_linkedin: publishes to a personal profile, which stays switched off until you explicitly share that identity.list_linkedin_pages: the Pages you have shared with this brand, with their organization ids.schedule_post: queues it, carryinglinkedinOrganizationIdso the right identity posts.manage_linkedin_post: edit the copy of a post, or delete it.linkedin_page_analytics: organic Page performance: follower gains, Page views, and post impressions, clicks and engagement, per Page or per post.search_linkedin_ads: the LinkedIn Ad Library, the one public ad library that exposes real impression counts.
LinkedIn is the channel where identity is a permission rather than a preference. One person usually administers several companies’ Pages, so Hermoso makes the postable identities an explicit choice: only the Pages you have ticked under Manage accounts can be posted to, an unticked Page is refused server-side rather than in the UI alone, and the personal profile is off unless you turn it on. An agent that asks which Page rather than assuming is doing the right thing.
LinkedIn limits worth knowing before you automate anything
| Text | A LinkedIn post is capped at 3,000 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. A LinkedIn post publishes to the profile or the company Page, and “LinkedIn has no unlisted, private or draft post.” |
| Carousel | 2 to 20 images, from a company Page. Both bounds are LinkedIn’s own: “A MultiImage post is a post containing multiple images (minimum of 2 images and maximum of 20 images)”, and the schema adds “Only supports images”. Two refusals follow from that and both are by name rather than by silent downgrade: a video slide is refused because LinkedIn’s multi-image post cannot carry one, and a personal-profile carousel is refused with the way forward: pass linkedinOrganizationId (from list_linkedin_pages), because “a personal-profile carousel is not something Hermoso can publish.” |
| Which account | linkedinOrganizationId. Unset means the member’s own profile, never “probably the company”. The field is how you say which Page, and leaving it out is a decision rather than an accident. |
Try it in Perplexity
Ask for it in ordinary language. These are plain sentences, not a DSL:
“Write a LinkedIn post for our company Page on what changed in our market this quarter, with sources, and publish it with a 4-image carousel of the charts.”
That walks list_linkedin_pages → plan_ad → render_ad → post_to_linkedin_page → linkedin_page_analytics. How Perplexity confirms a tool call is Perplexity’s setting, not ours. Hermoso’s own 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 on LinkedIn: the part that bites
In a Perplexity Enterprise organization an admin can add Hermoso once for everyone, and choose between one sign-in for the whole org or a sign-in per member. Pick per member. One shared sign-in would put everyone on one Hermoso account, its credits and its brand, and which LinkedIn Pages a person may post to is decided per person for a reason.
Choose Streamable HTTP, not SSE, when you add the connector. Hermoso has no SSE endpoint, so an SSE connector fails the check Perplexity runs when you save it. In an Enterprise org, a connector an admin adds does not show up for members until it is shared from the Permissions screen.
Research LinkedIn before you post
search_linkedin_ads reads the LinkedIn Ad Library, which is unusual among public ad libraries in exposing real impression counts, so B2B competitor research on LinkedIn can be ranked by actual delivery rather than by guesswork about what is running.
The paid half
create_linkedin_ads_campaign_group → create_linkedin_ads_campaign → create_linkedin_ads_creative builds the tree, and everything is born as a draft. set_linkedin_ads_status is the only switch that arms real money and it refuses without an explicit confirmation. One access note that is better said than discovered: LinkedIn meters ad writes by the API tier your own ad account holds. Reporting and reads are unrestricted, and on the development tier an app may edit a small number of ad accounts, each registered by hand.
What Perplexity 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, post to: Facebook · Instagram · Threads · TikTok · YouTube · X · Pinterest · Bluesky · Telegram. Or see everything Perplexity can publish to.
Post to LinkedIn from: Claude · ChatGPT · Claude Code · Cursor · Codex · Cline · OpenClaw · Grok Bot · Hermes · Gemini CLI · Le Chat · Claude Cowork · Perplexity Computer · Paperclip
Frequently asked questions
Can Perplexity post to LinkedIn?
Yes, through Hermoso's MCP server. In Perplexity, add https://app.hermoso.ai/mcp as a custom connector and approve it with your Hermoso account. There is no key to paste. Perplexity then has 912+ tools, including the ones that publish to LinkedIn, plus the ones that research the ads already running in your market and render the creative in the first place.
How do I connect LinkedIn to Perplexity?
Two steps, once each. In Perplexity, 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 LinkedIn inside Hermoso under Settings → Connectors, which is an OAuth consent screen in a browser. After that Perplexity publishes to LinkedIn as an ordinary tool call.
What is the LinkedIn caption limit when posting from Perplexity?
A LinkedIn post is capped at 3,000 characters. Hermoso enforces it when the post is created or queued, so Perplexity is told immediately rather than failing later when nobody is watching.
What does it cost to post to LinkedIn from Perplexity?
Publishing to LinkedIn costs no credits; LinkedIn charges nothing per API call. Credits are spent on the render. Plans are $19, $49 and $149 a month for 1,000, 3,000 and 10,000 credits, and every feature is on every plan including Free. The only exception is enterprise SSO.
Can Perplexity post privately or as a draft to LinkedIn?
No. LinkedIn has no unlisted, private or draft post. A post publishes to the profile or the company Page. Hermoso refuses a visibility LinkedIn cannot honour at the moment you ask for it, rather than quietly publishing something weaker.
Can Perplexity schedule a LinkedIn post for later?
Yes. schedule_post queues it on one calendar shared with every other channel, with a per-channel caption if the copy should differ, and list_scheduled and cancel_scheduled read and pull it back. LinkedIn is one of the eleven channels that queue.
Start free with 30 credits at signup and 250+ more to earn. Every feature is on every plan. Credits are spent only on AI models and Ad Spy research; posting, scheduling, ads management and analytics are free.
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