Capacity
How many Notes you can have scheduled at once on each WriteStack plan, which Notes count toward the limit, and what happens when you reach it.
Your plan sets how many Notes can be scheduled at the same time. A slot frees up each time a scheduled Note publishes, so you can keep queueing as Notes go out.
Limits per plan
| Plan | Notes scheduled at a time |
|---|---|
| Hobbyist | 20 |
| Standard | 100 |
| Enterprise | Unlimited |
The Unlimited Schedules add-on removes the limit on any plan. It is a one-time payment. Prices and how to buy it are on Plans and limits.
What counts
A Note counts toward the limit when all of these are true:
- its status is scheduled,
- its posting time is in the future,
- it is synced to Substack.
These don't count: drafts, Ready Notes, published Notes, and scheduled Notes that are not synced to Substack yet. Moving a Note that is already scheduled to another time doesn't use a new slot.
When you reach the limit
| Where | What you see | What to do |
|---|---|---|
| Scheduling a Note in WriteStack | A dialog titled Schedule Limit Reached: "You have reached your limit of N active schedules." | Wait for a scheduled Note to publish, remove one from the queue, upgrade, or buy Unlimited Schedules. |
| Syncing Notes that were scheduled elsewhere (for example by an AI assistant) | A dialog titled You've reached your scheduling limit. It shows how many Notes fit and how many don't. | Click the button to sync the ones that fit and move the rest to Ready. Click Not now to leave them as they are. |
When you sync past the limit, WriteStack syncs the earliest Notes first. The rest move to Ready. Nothing is deleted. Schedule them again once space frees up.
For AI assistants
An assistant connected through MCP can read your remaining capacity with get_schedule_capacity and should never schedule more than that. See Build with WriteStack.
Tags and slots
How WriteStack picks a posting time for a Note, covering weekly slots, open versus reserved versus untagged-only times, OR tag matching, and what happens when no time fits.
Sync
How a scheduled Note gets from WriteStack to Substack, when you need to click the yellow Sync button, and the common reasons a Note didn't post.