8 platforms in v1. Twenty plus next.
v2 API · 280-grapheme tweets (t.co-aware) · 4 images OR 1 video OR 1 GIF · alt text best-effort via v1.1 metadata
AT Proto · 300-grapheme posts · 4 images or 1 video · video routes through the dedicated transcoding service automatically
v5 API · image + video pins · cover image required for video · destination URL reachability checked locally
Versioned REST · 3,000-grapheme commentary · personal posts in v1 · org posts via Marketing Developer Platform (MDP)
Meta Graph · 2,200-grapheme captions · JPEG-only photo path · 2–10 mixed-media carousels
Meta Graph · text up to 63,206 chars · single video OR up to 10 photos · video posts via /videos endpoint
Threads Graph API · 500-grapheme posts · 60-day token · containers expire after 24 h
Content Posting API · video uploads · creator OAuth · audit-gated production access