X API pricing in 2026: pay-per-use credits, $0.015 per post or $0.20 with a link, posting rate limits, OAuth setup and posting from an AI agent.

Buffer alternatives for founders and small teams, checked 28 October 2026: price at 5 and 12 accounts, free plans, team seats and AI agent (MCP) access.

TikTok Content Posting API: who can post, what the audit requires, caps and error codes, from TikTok's own docs (checked 26 Oct 2026).

Instagram API posting limits and requirements: 100 posts per 24 hours, professional accounts, JPEG only, 10-item carousels. Checked in Meta's docs.

Schedule LinkedIn posts with ChatGPT using LotsSocial. Follow the tested workflow, choose the right account and timezone, and check the live post.

Let clients connect their own accounts and approve posts by link, with no LotsSocial login. How agencies do it from an AI agent or the dashboard.