Cursor MCP for Social Media: Post and Schedule From Your Editor

If you build in Cursor, you can ship the launch post from the same window you shipped the feature. Add the Creator OS MCP server to Cursor and its agent can publish and schedule to Instagram, TikTok, YouTube, X, LinkedIn, Facebook and Threads, answer comments, and pull analytics. It is one entry in mcp.json.

  git push  ->  feature live
                     |
                     v
  Cursor agent: "write the changelog post, add the demo gif,
                 post it to X, LinkedIn and Threads at 10am"
                     |
                     v  MCP (mcp.creatoros.ca/mcp)
          +----------+----------+
          v          v          v
          X      LinkedIn    Threads

Step 1: get an API key

Create a Creator OS account, connect your socials, and copy the workspace API key from Settings, API keys. It starts with cos_live_.

Step 2: add the server to Cursor

Open Cursor Settings, then MCP, then add a new server, or edit ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project):

{
  "mcpServers": {
    "creatoros": {
      "type": "http",
      "url": "https://mcp.creatoros.ca/mcp",
      "headers": { "Authorization": "Bearer cos_live_..." }
    }
  }
}

The server should show a green dot and its tool list. If you commit .cursor/mcp.json, keep the key out of it and load it from your environment.

Step 3: ask the agent

• “Read the last 10 commits and write a short ‘what shipped this week’ post. Post it to X and LinkedIn at 10am tomorrow.”
• “Take public/demo.mp4 and post it as a Reel and a TikTok with a caption about the new export feature.”
• “Write a 5-post X thread explaining how we built the search feature, from docs/search.md.”
• “Which of our launch posts this month got the most clicks?”

Why developers use it

Build in public consistently

The hardest part of building in public is the posting, not the building. When the agent already knows what changed (it can read the diff), a launch post is one sentence away.

No platform APIs to learn

Seven platforms have seven auth flows, upload formats and rate limits. The server hides all of that behind tools like create_post, upload_media_from_url and get_post_analytics. If you want the same thing in your own code, the Creator OS API is the REST version.

Webhooks for your app

Want your product to react when a post goes live or a comment arrives? Ask the agent to register a webhook. See social media webhooks.

Same config, other editors

Windsurf and VS Code take the same mcpServers block. Claude Code uses one command, see claude mcp add. Claude and ChatGPT use sign-in instead of a key, see the MCP docs.

Troubleshooting

• Red dot or 401: check the header is exactly Authorization: Bearer cos_live_....
• Tools missing: reload the window after editing mcp.json.
• Several clients: one key is one workspace. Add one server entry per client with different names.

Prefer to watch? The KevBuildsApps YouTube channel walks through builds like this one, start to finish.

Get started

Plans start at $19.99/month, API and MCP included. Sign up, paste the block above, and post your next release from Cursor.