PostOnce MCP Server
Crosspost to TikTok, Instagram, YouTube & more automatically
PostOnce is a Productivity MCP (Model Context Protocol) server: Crosspost to TikTok, Instagram, YouTube & more automatically. It is listed as Proprietary and available as a hosted endpoint, so it works with no local install. Listed on MCP Collection since October 2026.
About PostOnce
PostOnce is an automatic social media crossposting tool and post scheduler. Its hosted MCP server (Streamable HTTP, API key via Bearer auth) lets AI agents list connected social accounts, publish posts and set up automatic crossposting to TikTok, Instagram Reels, YouTube Shorts, Facebook, LinkedIn, X, Threads, Bluesky and Pinterest. Registry: io.github.postoncehq/postonce.
How to connect PostOnce to Claude, Cursor or VS Code
PostOnce runs as a hosted remote MCP server at https://postonce.to/mcp. Add that URL to your MCP client's config (Claude Code, Cursor, Windsurf or VS Code) and the tools appear immediately, no install required.
{
"mcpServers": {
"postonce": {
"url": "https://postonce.to/mcp"
}
}
}Claude Code: claude mcp add --transport http postonce https://postonce.to/mcp. Servers that require OAuth or an API key will prompt on first use.
PostOnce FAQ
What is PostOnce?
PostOnce is a Model Context Protocol (MCP) server in the Productivity category. Crosspost to TikTok, Instagram, YouTube & more automatically. MCP servers expose tools that AI assistants like Claude can call during a conversation.
How do I use PostOnce with Claude or Cursor?
PostOnce runs as a hosted remote MCP server at https://postonce.to/mcp. Add that URL to your MCP client's config (Claude Code, Cursor, Windsurf or VS Code) and the tools appear immediately, no install required.
Is PostOnce free to use?
PostOnce is listed as Proprietary software. Check the project homepage for pricing and terms.