Bluesky Scheduler: Queue Posts to Bluesky From One Calendar

The Bluesky app vs Social Magnum

The native column states what Bluesky’s own scheduling does, verified against Bluesky's own app and API (AT Protocol), checked 22 Aug 2026.

What you can schedule to Bluesky

Text only

Yes

Images

Up to 4 images

Video

Not accepted

Bluesky posts are limited to 300 characters.

Why Bluesky needs a scheduler at all

Bluesky's app and website have no schedule button: a post goes out the moment you submit it. A feature request has been open since 2024 and the team has not committed to a date. Until then, scheduling on Bluesky means a third-party tool that holds the queue and posts through the AT Protocol at the set time.

That is what Social Magnum does, with one difference from single-network tools: the Bluesky post sits on the same calendar as Mastodon, Threads and the rest, so a launch written once can go everywhere at the same slot, adapted to Bluesky's 300-character limit.

How scheduling a Bluesky post works here

Bluesky has no permission scopes, so it is connected with an app password rather than your account password.

1. 1In Bluesky, open Settings, then Privacy and security, then App passwords, and create one for Social Magnum. It can be revoked there whenever you like.
2. 2Connect the account with your handle and that app password. The password is stored encrypted and never shown again.
3. 3Write the post; the composer counts to 300 characters and accepts up to four images. Video is refused before you schedule, not after.
4. 4Pick the slot on the calendar, in your workspace timezone, and optionally route it through approval.
5. 5At the slot it publishes through the AT Protocol. Failures are marked with the reason and can be retried.
6. 6Replies land in the Engage inbox next to your other networks.

Post to Bluesky from your AI agent

The Social Magnum MCP server lets Claude, ChatGPT, Gemini or Cursor draft and schedule Bluesky posts and read replies through your account, after a single browser approval.