Preflight

Preflight is a social media scheduler for 12 networks (Instagram, TikTok, YouTube, LinkedIn, Discord, Facebook, Threads, Bluesky, Mastodon, Pinterest, Tumblr and Telegram). Before a post goes out, it is checked against each network's real limits, such as text length, media size and format, hashtags and links, so you see a problem while you can still fix it instead of after a failed publish. It also has a REST API and an MCP server, so scripts and AI agents can schedule and publish through the same checks. Free plan available.