Introduction
Draft Substack Notes in your voice, queue them on a weekly schedule, sync them to Substack, and see which ones grow your audience.
WriteStack helps you post Substack Notes consistently. You draft Notes in your voice, line them up on a weekly posting schedule, sync them to Substack, and then see which ones grew your audience.
Pick your path
The docs are split three ways. Start with the one that describes you.
Using WriteStack
Schedule Notes, sync to Substack, write articles, work with the Coach and read your analytics.
Account & billing
Plans and limits, trials, upgrades, cancelling, invoices, refunds and affiliates.
Build with WriteStack
Connect Claude, ChatGPT, Notion or your own agent over MCP. Full tool reference.
The main loop
| Step | What you do | Where |
|---|---|---|
| 1. Draft | Write a Note yourself, or have WriteStack draft it in your saved writing style. | My Notes → New note |
| 2. Queue | Add the Note to your queue. It takes the next free time on your weekly schedule. | Note editor → Add to Queue |
| 3. Sync | The browser extension schedules the Note on Substack. Substack publishes it at its time. | My Notes → Scheduled notes |
| 4. Measure | See impressions, engagement and new subscribers for each published Note. | Notes Performance |
The queue lives in WriteStack. A Note only reaches Substack once it is synced. Read Sync to understand when that happens on its own and when you need to click the yellow button.
Start here
Schedule your first Note
Sign up, connect Substack, queue a Note and confirm it posted.
Sync
How Notes get from WriteStack to Substack, and why a Note didn't post.
Notes and the queue
Drafts, Ready, Scheduled, Published and Evergreen.
Tags and slots
Reserve posting times for certain kinds of Notes.
Main sections
Setup
Connect your Substack and install the browser extension.
Notes
Draft Notes, add images, tags, evergreen and auto-restack.
Schedule
Set your weekly posting times and manage the queue.
Articles
Write long-form posts and send them to Substack as drafts.
The Coach
Quill, the writing coach that knows your publication and stats.
Analytics
See which Notes and posts grow your audience.
Cross-posting
Send Notes to other social networks through Buffer.
Troubleshooting
Fix sync errors, connection problems and schedule mismatches.
For AI agents
- Index: /llms.txt. Every page in one file: /llms-full.txt.
- Any page as Markdown: add
.mdto its URL, or sendAccept: text/markdown. - MCP server:
https://www.writestack.io/api/mcp/mcp. Setup is in Build with WriteStack.