Onepostly

Onepostly is a unified social media API that lets you publish, schedule, and manage content across X, Instagram, Facebook, Threads, LinkedIn, YouTube, TikTok, Pinterest, Bluesky, and more from one endpoint. Instead of building separate OAuth flows, media uploads, and rate limit handling for each platform, connect accounts once and ship social features in hours. Includes REST API, scheduling, webhooks, insights, engagement tools, and native MCP support for AI agents. Used by developers, SaaS products, agencies, and creators. Free to start.