Which Mastodon instance should I connect?

Whichever one you actually post from. PostHub stores the instance alongside your handle, so @you@hachyderm.io and @you@fosstodon.org can sit side by side in the same workspace and queue.

Is the 500-character limit enforced per server?

Server limits can vary slightly, so the composer uses 500 as the default ceiling and drops to your server's own maximum if it is stricter. The counter turns amber as you approach it, and a scheduled toot never fails on length.

Do content warnings and polls survive scheduling?

Yes. The CW text, the hidden body and any attached polls are stored with the draft and rebuilt when PostHub publishes, exactly as you wrote them.

Can I post to more than one instance at a time?

Toot Scheduling, Multi-Instance Support, Smart Scheduling, Community Focused all work across multiple connected instances. Write once, pick the instances, and each one publishes with its own handle.

How do I disconnect an instance?

Revoke the application from your instance preferences (Preferences → Development → Authorized applications) or remove it in PostHub. Both sides clear immediately, and scheduled posts for that instance are cancelled.

All platforms/platforms/mastodon Mastodon

Fediverse · ActivityPub

Mastodon Schedulerstarts with your server

Pick your instance, queue your toots, and let federation carry them — PostHub schedules Mastodon posts with content warnings, images and multi-instance publishing built in. Pick the instance that shares your rules, then queue toots that fan out across the whole federation on time, every time.

Start Posting

See pricing

0

characters per toot

0

networks live

0

ads injected anywhere

Choose your home serverstep 1 of 2

You will publish as

@you@hachyderm.io

No harassmentCredit artists

PostHub posts to this instance · move later, keep your followers

PH

Maya · @maya@mastodon.social

just now · 3 instances

live

relay

Queued from PostHub, published to every instance that follows you — one draft, no copy-paste.

relay3 / 3

How federation works

Post once, land on every server

Federation mapliveactivitypub

home instanceremote instancerelay

Federated timeline3 servers

HA

hachyderm.iohome

Animals, art, kind moderation

84,200

FO

fosstodon.orgrelay

Open source & tech folk

112,400

MA

mastodon.socialremote

The flagship general server

692,000

HA

hachyderm.ioqueue

Animals, art, kind moderation

84,200

FO

fosstodon.orghome

Open source & tech folk

112,400

MA

mastodon.socialrelay

The flagship general server

692,000

HA

hachyderm.ioremote

Animals, art, kind moderation

84,200

FO

fosstodon.orgqueue

Open source & tech folk

112,400

MA

mastodon.socialhome

The flagship general server

692,000

HA

hachyderm.iorelay

Animals, art, kind moderation

84,200

FO

fosstodon.orgremote

Open source & tech folk

112,400

MA

mastodon.socialqueue

The flagship general server

692,000

streaminglive

01 · hachyderm.io

Your instance

PostHub authenticates here and drops the toot on your own server.

02 · ActivityPub

The federation

Your server pushes it to every remote server that follows you.

03 · any instance

Everyone else

Readers on fosstodon, mastodon.social or a tiny self-hosted box all see it.

One toot, written once. Federation is the part users never have to think about — PostHub just needs to know which of your instances to call home.

Your instance, your rules

Trust is a setting you actually control

Instance rulespinned

1No ads, no engagement bait — your post order is the order it was written.
2Your admin is a person you can actually message, not a support queue.
3Content warnings stay attached through scheduling, images and all.
4Move instance later: followers can come with you, drafts stay in PostHub.

moderation shield active

01Toot SchedulingQueue toots with images, alt text and content warnings attached, so a CW still hides the body exactly as you wrote it.

02Multi-Instance SupportConnect hachyderm, fosstodon or your own self-hosted box and publish to any of them from a single dashboard.

03Smart SchedulingBest-time suggestions per instance, drag-and-drop slots and auto-publish that runs whether or not your dashboard is open.

04Community FocusedConsistent posting keeps your instance’s timeline alive without living in it — draft once, let the queue show up for you.

How it works

Three steps to your first scheduled post

Connect

Sign in through Mastodon's own flow. The account lands in your workspace and stays there.

Compose

Write once. The composer counts down the 500-character limit and previews the post exactly as it will publish.

Publish

Pick a slot or let best-time suggestions place it. PostHub publishes and reports the result back.

In the workspace

Run it like a server console

posthub · mastodon@hachyderm.iorelay online

$ posthub connect mastodon

✓ instance authorized · scopes: write:statuses

$ posthub queue --list

$

Schedule toots with images and CWs01
Post to multiple Mastodon instances02
Track boosts and favorites03
Cross-post to other platforms04
Best-time posting recommendations05
Preview posts before publishing06
Queue posts from one composer07
Keep your handle and server history08

08 jobs queuedauto-publish on

Questions

PostHub

Mastodon Schedulerstarts with your server

Post once, land on every server

Your instance

The federation

Everyone else

Trust is a setting you actually control

Three steps to your first scheduled post

Connect

Compose

Publish

Run it like a server console

Servers, boosts and the fine print