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v2026.09.27

Custom Cover Frames, YouTube Thumbnails, and a LinkedIn Mentions Fix

This release gives you finer control over how your TikTok and YouTube posts look, and fixes a LinkedIn tagging bug:

  • Pick the TikTok cover frame: Set videoCoverTimestampMs when posting a video to TikTok to choose exactly which frame becomes the cover, instead of letting TikTok pick one for you. Sending a timestamp of 0 now correctly selects the very first frame instead of being ignored.
  • Custom YouTube thumbnails: Add youtube.thumbnailUrl to a post to set a custom thumbnail image (JPEG or PNG, up to 50MB) on your uploaded video. No reconnection is required for existing YouTube accounts. If the thumbnail can't be applied (for example on an unverified channel), your video still publishes normally with a default thumbnail.
  • Tag LinkedIn company pages you don't administer: Mentioning an organization in a LinkedIn post no longer fails with a 403 error when you're not an admin of that page. Tagging now works the same whether or not you manage the page, as long as the mentioned name matches.
  • Clearer LinkedIn error messages: Failed LinkedIn requests now surface the actual error details from LinkedIn instead of an unhelpful generic message, making it easier to diagnose account or permission issues.
  • Easier discovery for AI tools and agents: Our API and MCP server are now easier for AI assistants and agents to find and understand, with a published API catalog and server metadata alongside our public site.