MCP servers and skills that let AI agents write, publish and schedule social media posts. Each repo connects Claude, ChatGPT, Cursor, Codex or any MCP client to one platform through its official API via PostOnce, and ships Agent Skills for writing content that works there. No scraping, no browser automation, no developer app.
| Platform | Repo | Skills for |
|---|---|---|
| All 9 platforms | postonce-skills | one post written natively for every platform, content calendars, hooks, viral formats |
| linkedin-mcp | posts, carousels, formatting, headlines, profile | |
| instagram-mcp | captions, carousels, Reel scripts, bios, hashtags | |
| TikTok | tiktok-mcp | scripts, hooks, captions, photo slideshows |
| YouTube | youtube-mcp | titles, descriptions, tags, scripts, Shorts, thumbnails |
| facebook-mcp | Page posts, Reels, Page copy | |
| X (Twitter) | x-mcp | tweets, threads, formatting, bios |
| Threads | threads-mcp | posts, crossposts, bios |
| Bluesky | bluesky-mcp | posts, bios, custom domain handles |
| pinterest-mcp | pins, descriptions, keywords, boards, blog-to-pins |
Every repo also includes a content calendar skill that plans and schedules a few weeks of posts.
Claude and ChatGPT: add https://postonce.to/mcp as a custom connector and sign in with PostOnce.
Claude Code:
claude plugin marketplace add postoncehq/plugins
claude plugin install postonce@postoncehqSetup for every client: postonce.to/integrations · Try PostOnce free for 7 days, no card.