TikTok

Caveats

Short-form video powerhouse. Algorithm rewards early engagement velocity.

Last verified: 2026-04-11

⚠ Aging — may be out of date — last verified 2026-04-11. Ping platforms@flayr.social if you need a fresh check.

Overview

TikTok is the most aggressive algorithm in social — early engagement velocity within the first 60 minutes decides whether a post reaches 500 views or 500,000. Flayr optimizes for posting during audience-specific peak windows.

Daily posting limits

Videos per day
30 videos
Caption length
2,200 characters
Hashtags per post
100 hashtags (pragmatic: 5-8)

New account rules

New accounts are capped near 5 videos/day for the first week. TikTok soft-blocks accounts that post >10 videos/day in the first 14 days. Flayr throttles the queue accordingly.

Content type restrictions

Video length
15s – 10 minutes
Video file size
1GB mobile / 4GB desktop
Aspect ratio
9:16 preferred (full-screen)

Rate limits

Content Posting API: 6 posts per day per account (official hard cap at the API level). Research API: 1,000 calls/day. Flayr uses the Content Posting API through Zernio for authenticated posts.

Known issues

API caps posts at 6/day even if platform UI allows 30. Flayr surfaces the limit pre-publish.
Music from the Commercial Music Library only — consumer music gets stripped on API uploads.
Scheduled posts via the API can lag up to 5 minutes vs the requested time.

Recent platform changes

2026-03-25
Content Posting API daily cap was temporarily reduced to 4/day for 48 hours during a stability rollback. Zernio auto-absorbed the difference.

How Flayr handles this

Flayr caps daily posts at the API limit (6) regardless of platform UI claims, auto-swaps consumer music for Commercial Music Library tracks, and warns on aspect ratios that will letterbox.