Why Your AI Agent Still Can’t Schedule a Social Post — And Which Tools Actually Work in 2026
Six months, five platforms, and one Instagram password reset that was never going to work. Six of the nine major social platforms accept no future timestamp at all — which means your scheduler isn’t scheduling on Instagram, it’s scheduling on you. Here’s the real cause, the silent failures nobody documents, and an honest comparison of Ayrshare, Blotato, Zernio, Buffer and Postiz as of September 2026.