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Launching with TikTok

Schedule TikTok posts with AI

Postnavo is launching with TikTok scheduling for videos and photo carousels: upload once, write the caption with Navo, and schedule the same video to Reels and Shorts alongside it.

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Formats at launch

  • Videos
  • Photo carousels

Captions up to 2,200 characters via the posting API. TikTok counts UTF-16 units; the counter counts visible characters. Check your post length

At launch, Postnavo will

  • let you upload a video once and schedule it to TikTok, Reels and Shorts, each with its own caption
  • schedule photo carousels as well as videos
  • save hashtag sets as templates
  • let Navo or your agent write captions in your brand voice
TikTok’s own documentation

What TikTok allows a scheduler to do

Read on 2026-10-12. Where TikTok’s pages are silent, so is this one.

TikTok rules for scheduled posts
RuleWhat TikTok documents
Account and access A TikTok account that authorises the app for the video.publish scope, which TikTok must first approve for that app.1
Apps that are not audited Everything posted by a client that has not passed TikTok’s audit is restricted to private viewing.1
Caption A video caption is up to 2,200 characters, which TikTok counts in UTF-16 runes, hashtags and mentions included. A photo post has a title of up to 90 and a description of up to 4,000.23
Video MP4 (recommended), WebM or MOV, 23 to 60 frames a second, 360 to 4,096 pixels a side, up to 4 GB. All creators can post 3-minute videos; some can post 5 or 10 minutes.5
Photos Up to 35 images in one post, WebP or JPEG, 20 MB each and at most 1080p.35
Published limits 6 requests a minute for each user’s token. The reference also names a daily post cap for each user and a daily cap on publishing users for each app, without a figure.24
AI label Setting is_aigc marks a video or a photo post as AI generated, and TikTok adds a “Creator labeled as AI-generated” tag.23

What TikTok’s API lets a scheduler publish

Videos and photo posts, in two modes. Direct Post publishes to the creator’s profile. Upload sends the media to the creator’s TikTok inbox instead, where they open the notification, finish editing in the app and post it themselves.

A video arrives as a file sent in chunks or from a URL on a domain the app has verified with TikTok; a photo must come from a verified URL. Along with the caption, a direct post sets who can see it, whether comments, Duet and Stitch are off, which frame is the cover, and whether it promotes the creator’s own business or is a paid partnership.

Sources1235

The creator’s account sets the limits

Before each post a tool asks TikTok what this creator may do: the privacy levels on offer, whether comments, Duet and Stitch are available, and the longest video the account can post, which differs from one account to the next. A post that asks for a privacy level outside that list is refused.

Sources24

Two approvals before a post is public

TikTok checks an app twice. The video.publish scope has to be approved, and the client then has to pass an audit of its compliance with TikTok’s terms. Until that audit, all content it posts is restricted to private viewing.

Sources1

Sources, checked 2026-10-12

  1. TikTok Content Posting API: get started
  2. TikTok Content Posting API: direct post reference
  3. TikTok Content Posting API: photo post reference
  4. TikTok Content Posting API: query creator info
  5. TikTok Content Posting API: media transfer guide

Every figure is TikTok’s own, as its page stated it that day. The linked page has the last word.

Two ways to post to TikTok

With AI

Agentic

Ask ChatGPT, Claude, OpenClaw or Navo to write and schedule your TikTok posts. See supported agents

By hand

Classic

Write, preview and schedule TikTok posts yourself from the visual calendar.

FAQ

Frequently asked questions

Can I post the same video to TikTok, Reels and Shorts?

At launch, Postnavo will let you upload a video once and schedule it to each network with its own caption. The limits differ: TikTok takes a 2,200-character caption and YouTube a 100-character title.

How will my AI agent post to TikTok through Postnavo?

Once Postnavo launches, you upload the video and your agent, or Navo inside the app, writes the caption and hashtags in your brand voice and schedules it. TikTok’s API publishes only with the privacy levels your account offers, so the post follows your account’s own settings.

Why would a TikTok post from a tool stay private?

TikTok restricts everything posted by an app that has not passed its audit to private viewing. A post also has to use one of the privacy levels the creator’s account offers.

How long can a TikTok caption be?

Up to 2,200 characters for a video posted through TikTok’s API, counted in what its reference calls UTF-16 runes, with hashtags and mentions included. A photo post takes a 90-character title and a 4,000-character description.

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