Mellow Hub

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Mellow Hub publishes one post to nine social networks: Instagram, TikTok, YouTube, X, LinkedIn, Threads, Bluesky, Pinterest and Facebook. You write it once in the web composer or hand it to an AI agent such as Claude or ChatGPT through MCP or REST, and Hub checks every network's own rules (caption length, media count and type, required title or board) before anything is sent, listing every problem at once. Each network succeeds or fails on its own and returns its own link. An agent publishes under a key or an approval its owner created: the channels it may touch, review or autopilot mode, a daily ceiling and an expiry. Every action is journaled, and revoking takes effect on the next request. Hub also has free browser tools: a carousel maker, character and hashtag counters, image and video checkers, a thumbnail tester, and AI writers for hashtags, captions, X posts, YouTube titles and descriptions and LinkedIn posts. Plans start at $19 a month after a 7-day trial; publishing is unlimited under a fair-use ceiling. Not included: team seats, an inbox, or comment and message management.