posterly

MCP connector

LinkedIn MCP server

Schedule LinkedIn posts, PDFs, and polls from Claude or ChatGPT, as yourself or as a company Page.

This is the posterly MCP server, used for LinkedIn. The same connection works from Claude, ChatGPT, Cursor, and other MCP clients. It is not a separate LinkedIn-only download.

Get Starter + API · $10/moHow to connect the MCP server

What you can do on LinkedIn

Connect a personal profile to post as yourself, or a company Page to post as the brand. Your AI client then publishes text, images, video, multi-image posts of up to 20 items, PDF documents, and polls, with captions up to 3,000 characters.

LinkedIn rewards native formats, and the assistant can use all of them. A PDF goes up as a document post with a title of up to 100 characters. A poll takes a question of up to 140 characters and 2 to 4 options, open for 1 day, 3 days, 1 week, or 2 weeks, and it cannot carry media. You can also add a link preview, a custom video thumbnail, a Buy now or Shop now button, and mention companies by name.

The same connection reads LinkedIn analytics. On the Pro plan or higher, the inbox reads comments on your company Page posts and can send public replies. LinkedIn has no direct messages here, and comments on personal profiles cannot be read, so those stay out of reach.

  • Text posts
  • Images
  • Video
  • Multi-image
  • PDF posts
  • Custom cover
  • Polls
  • Extra tagging tools
  • Analytics
  • Comments

Post types: text, image, video, carousel, document. Analytics can be read for this platform. On the Pro plan or higher, the inbox tools can read and reply to comments.

Tools

These are the tools your AI client uses for LinkedIn. Ask it to call list_platforms with view=schema and the account_id before it sets anything specific to LinkedIn.

Account and connection

  • whoamiWho am I

  • list_accountsConnected accounts

  • list_platformsPlatforms

  • create_connect_sessionStart a connect session

Posts

  • validate_postValidate a post

  • create_postCreate a post

    Show the caption, account, and time, then wait for confirmation before confirm=true.

  • create_posts_batchCreate posts in bulk

    1 to 25 posts in one confirmed request.

  • update_postEdit a post

    Show the caption, account, and time, then wait for confirmation before confirm=true.

  • list_postsPosts

  • get_postOne post

  • delete_postDelete posts

    Live removal needs an eligible connection and confirm_published. A refusal keeps the posterly record.

  • find_available_slotFind a free slot

  • generate_captionsGenerate captions

Media

  • upload_mediaUpload media

    Hosted requests are about 4MB, so this path is for small files. Large files use create_signed_upload or create_media_drop.

  • create_signed_uploadSigned upload link

  • create_media_dropMedia drop link

  • list_mediaMedia library

Analytics

  • list_analyticsAnalytics

    Includes: Account analytics, Post analytics, Post insights.

Platform helpers

  • trigger_platform_helperRun a platform helper

Inbox comments (Pro plan or higher)

  • list_commentsComments

    Includes: List comments, One comment with its replies.

  • manage_commentManage comments

    Includes: Reply to a comment, Hide or mark read, Delete a comment.

Helpers for trigger_platform_helper

  • linkedin.recent_mentionsReturn recent LinkedIn organization mentions used by this user.

How to connect

  1. Add the hosted server in Claude, ChatGPT, Cursor, or another MCP client. Server URL: https://www.poster.ly/api/mcp. Sign in with posterly OAuth and press Allow. Use the www host. In ChatGPT, write actions need a Business, Enterprise, or Edu plan.
  2. Or, in a client that can run a local process (Cursor, Claude Code, Windsurf, and similar), use npx -y posterly-mcp-server@latest with a POSTERLY_API_KEY placeholder in that client's MCP config.
  3. Call whoami and list_accounts so you know which workspace the client is using.
  4. Connect LinkedIn with the method below, then call list_platforms with view=schema and the account_id.

LinkedIn Personal

Ask your AI client to start a connection, open the link it gives you, and approve access on the platform.

Connect LinkedIn Personal in the dashboard

LinkedIn Page

Ask your AI client to start a connection, open the link it gives you, and approve access on the platform.

Connect LinkedIn Page in the dashboard

Example prompts

  • Schedule this PDF to my company Page on LinkedIn on Tuesday at 8am, titled "2026 hiring report", with a short intro caption.
  • Post a LinkedIn poll tomorrow asking which topic we should cover next, with four options, open for a week.
  • Show me the comments from the past week on our LinkedIn Page posts and draft a public reply to each one.

LinkedIn limits

Caption or text
3,000 characters.
Media count
Up to 20 media items.

Request rates depend on your plan. The posterly MCP page lists them.

Pricing

API and MCP access is an add-on to any posterly plan. Starter plus API is $10 a month, charged now with no free trial on this checkout.

Get Starter + API · $10/moSee every plan

FAQ

What is the LinkedIn MCP server?

It is the posterly MCP server, not a separate product. Connect it once and the same connection covers LinkedIn and 17 other platforms, from Claude, ChatGPT, Cursor, and other MCP clients.

How do I connect LinkedIn?

Add the hosted server at https://www.poster.ly/api/mcp and sign in with posterly, or run npx -y posterly-mcp-server@latest in a client that can start a local process. LinkedIn Personal: Ask your AI client to start a connection, open the link it gives you, and approve access on the platform. LinkedIn Page: Ask your AI client to start a connection, open the link it gives you, and approve access on the platform.

Can I post as my company Page instead of my profile?

Yes. posterly has separate connections for a personal profile and a company Page, and your AI client posts to whichever account you name. Connect the Page when you want brand posts, Page mentions, and Page comments in the inbox.

Can Claude publish a PDF or a poll on LinkedIn?

Yes. A PDF is published as a document post and needs a title of up to 100 characters. A poll needs a question and 2 to 4 options, with a duration of 1 day, 3 days, 1 week, or 2 weeks, and cannot include an image, video, or document.

Keep reading

MCP

posterly MCP server

Hosted OAuth setup, the local npm package, and the full tool list.

Scheduler

LinkedIn scheduler

Schedule LinkedIn from the posterly calendar and composer.

Guide

LinkedIn guide

Read the long LinkedIn guide, then come back to connect it.

Pricing

posterly pricing

Compare plans, then add API and MCP at checkout.

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