Socialync MCP Server

Official documentation and registry manifest for the Socialync hosted MCP server. Socialync is a cross-posting and scheduling tool for creators: upload once, publish to TikTok, Instagram, YouTube, Facebook, X (Twitter), LinkedIn, Threads, and Bluesky.

This MCP server lets Claude, ChatGPT, and any MCP-compatible AI agent draft, schedule, and publish social media posts through your own OAuth-authorized Socialync account, with human-in-the-loop approval built into the workflow.

Every platform integration runs on the official platform API. No browser automation, no scraping, no unofficial endpoints. Your agent cannot get your account restricted on our behalf.

Duplicate protection means a retry can never publish twice, and failed posts are retried automatically. Both matter when an agent is posting unattended.

Note: Socialync's server is hosted (remote) and closed source. This repository contains the documentation and the MCP Registry manifest only. There is nothing to install or run from here.

Endpoint

https://mcp.socialync.io/mcp

Transport: Streamable HTTP. Authentication: OAuth 2.0 with dynamic client registration. You sign in with your Socialync account in the browser; no API keys are pasted into your client.

MCP and API access are on the free plan. $0, no credit card, 5 posts a month across all 8 platforms. Your agent can connect and publish without anyone reaching for a card. Paid plans start at $20/month for unlimited posts and 5 connected accounts. Plans and pricing.

Limits worth knowing: 1 API key per brand, and 10 AI-created posts per day per brand.

Connect

Claude (claude.ai): Settings, then Connectors, then "Add custom connector", and paste the endpoint URL above. Full walkthrough: Socialync MCP connector guide.

Claude Code:

claude mcp add --transport http socialync https://mcp.socialync.io/mcp

OpenClaw:

openclaw mcp add socialync --url https://mcp.socialync.io/mcp --transport streamable-http
openclaw mcp login socialync

Other MCP clients (generic config):

{
  "mcpServers": {
    "socialync": {
      "type": "streamable-http",
      "url": "https://mcp.socialync.io/mcp"
    }
  }
}

What your agent can do

Text and image posts publish to Instagram, Facebook, X, LinkedIn, Threads, and Bluesky. Video posts, including TikTok and YouTube (title required), are supported through scheduled posts using media hosted in your Socialync library or a public video URL.

Full reference, including recommended call order, per-platform limits, and error handling: docs/tools.md.

How the human stays in the loop

The intended workflow is draft first, publish second. Agents create drafts with create_post_draft; nothing reaches a social network until the draft is approved and explicitly published or scheduled. Posts go out through OAuth connections you authorized in Socialync and can be revoked at any time from your account settings. AI assistants help you draft, schedule, and publish; they do not operate accounts you have not connected and approved.

Agent skill

An OpenClaw skill wrapping this server is published on ClawHub:

openclaw skills install @jackvitick/social-media-scheduler

Links

• Website: socialync.io
• MCP feature overview: socialync.io/features/mcp
• Connector setup guide: socialync.io/mcp-connector-guide
• Terms of Service: socialync.io/terms-of-service
• Developer Agreement (API and MCP): socialync.io/developer-terms
• Privacy Policy: socialync.io/privacy-policy

Support

Questions or issues: open an issue here or email support@socialync.io.

Follow Socialync

• X: https://x.com/Socialync_io
• Instagram: https://www.instagram.com/socialync.io/
• TikTok: https://www.tiktok.com/@socialync.io
• YouTube: https://www.youtube.com/@Socialync-io
• LinkedIn: https://www.linkedin.com/company/socialync
• Threads: https://www.threads.com/@socialync.io
• Bluesky: https://bsky.app/profile/socialync.bsky.social