Socialync

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.

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://socialync-mcp-ntgtgrzanq-ue.a.run.app/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 access is included on the Socialync Premium and Business plans. Plans and pricing.

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://socialync-mcp-ntgtgrzanq-ue.a.run.app/mcp

Other MCP clients (generic config):

{
  "mcpServers": {
    "socialync": {
      "type": "streamable-http",
      "url": "https://socialync-mcp-ntgtgrzanq-ue.a.run.app/mcp"
    }
  }
}

What your agent can do

Tool	What it does
list_profiles	List your Socialync brand profiles
list_connections	Show which social accounts are connected
check_quota	Check your remaining post quota
generate_content	Generate platform-native captions with AI
create_post_draft	Draft a post (text, image, or video) for one or more platforms
schedule_post_draft	Attach a publish time to a draft
approve_draft	Human approval step before anything goes live
get_draft_status	Check where a draft is in the pipeline
publish_now	Publish an approved draft immediately
publish_scheduled	Queue an approved draft for its scheduled time
get_scheduled_posts	List upcoming scheduled posts
delete_scheduled_post	Cancel a scheduled post
get_post_history	Review published post history and status
get_top_posts	Surface your best-performing content
get_analytics	Pull follower and engagement analytics
list_media	Browse media you have uploaded to Socialync
create_media_upload / finalize_media_upload	Upload images for posting

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.

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.

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 [email protected].

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