Schedule Substack notes with Eden

How Substack scheduling works

Every other network in Eden (X, LinkedIn, Threads, Instagram, TikTok, Facebook) publishes from Eden's servers. Substack blocks automated posting from servers, so Eden works through your own signed-in devices — the Chrome extension, the Eden desktop app, or the Eden mobile app (iPhone and Android) — in two ways:

• Text notes (most notes): scheduled natively on Substack. The first of your devices that comes online quietly hands each note to Substack's built-in Notes scheduler — usually seconds after you hit Schedule. Eden stages your next few notes (up to a week ahead) and tops the queue back up as each one publishes. From that moment the note shows an "On Substack ✓" badge in your queue and will publish at its exact time — laptop closed, phone off, doesn't matter. You can still edit, reschedule, or cancel it in Eden; changes sync to Substack the next time one of your devices is online.
• Threads and image notes: published live at the slot. Substack's scheduler can't chain a reply thread or (yet) carry Eden-attached images, so these still post from your browser at the scheduled time — Chrome (with the Eden extension) or the desktop app needs to be running within about ten minutes of the slot. If nothing was online, Eden flags the note honestly instead of posting it stale hours later. The composer warns you in amber the moment an image lands on your Substack note, so you always know which lane a note is on before you schedule it. An image attached to another platform only (say a LinkedIn post card) doesn't count — Substack keeps its native slot.

Set it up

1. 01

   Install and connect the Eden Chrome extension

   Add Eden from the Chrome Web Store, pin it next to the address bar, click the icon, and choose "Connect Eden" to link your account.

2. 02

   Sign in to Substack in that same Chrome

   Open substack.com and make sure you're logged in. Eden acts as your signed-in browser session — if you're not signed in, nothing can be scheduled or posted.

3. 03

   Connect Substack in Eden — one click

   In Eden, go to Settings → Scheduling → Connected accounts and click Connect Substack. With the extension installed and Substack signed in, that's it — the extension links your account and fills in your handle automatically.

4. 04

   Optional: connect Substack on your phone too

   In the Eden mobile app (iPhone or Android), open schedule settings and tap Substack on this phone → Connect, then sign in (use your password — email magic links open outside the app). Now notes you schedule from your phone are handed to Substack seconds later, no computer involved.

5. 05

   Schedule your first note

   Write a note, choose Substack, pick a time, and save. Watch for the On Substack ✓ badge in the queue — that's your confirmation it will publish no matter what.

What to expect

• Text notes publish at their slot, devices off. Once you see "On Substack ✓", it's locked in on Substack's side. You can verify any time in Substack's own Drafts list.
• Edits are honest about timing. Changing a handed-off note works from Eden — edit it and click Update — and it re-syncs the next time a device of yours is online, so keep a browser with the Eden extension open. If nothing comes online before the slot, the original version posts — the queue shows this state. In the final 5 minutes before the slot the note locks and can no longer be changed or cancelled from Eden.
• Threads and image notes need a live browser at the slot. Same rules as before: Chrome (or the desktop app) running on an awake machine within the ten-minute window. Missed ones are flagged as drafts with a warning, never posted stale.
• Scheduling from anywhere is instant. Whether you schedule on web, from your phone, or through the Eden connector in Claude, your devices are woken immediately to do the handoff.
• Your other networks are unaffected. They still publish from Eden's servers whether or not your computer is on.

Schedule full Substack articles

The lanes above handle Substack notes. Long-form Substack articles get the same reliable treatment: Eden hands the article to Substack's own post scheduler ahead of time, so it publishes at its slot with your machine off. You can confirm any time in your publication's Scheduled tab on Substack — a handed-off article shows up there like one you scheduled by hand.

• Works through Chrome with the Eden extension (the same setup as notes) or the Eden desktop app. Write the article in the Publish pane, pick a time, and save — the handoff usually happens seconds later.
• To edit an article after it's handed off, unschedule it in Eden first. Once it's on Substack's scheduler the article opens read-only in Eden, with a banner offering Move to drafts. Pull it back, make your changes, and schedule it again — Eden hands off the new version.

Publications on a custom domain

Some publications live at their own domain — say letters.yourname.com instead of yourname.substack.com. Scheduling to one works exactly the same, with one extra step the first time: Chrome doesn't let extensions work on a custom domain until you approve it, so the Eden extension needs a one-time OK from Chrome for your domain.

Eden asks for it whenever it's needed, in whichever place you happen to be:

• A grant tab opens with an Allow yourdomain.com button. Click it, accept Chrome's own prompt, and you're done — scheduling works on that domain from then on. You'll never be asked again.
• On a blocked post, the card in your queue shows an amber "Chrome needs access to yourdomain.com" warning with a one-click Grant access button.
• From settings, the Reconnect button on the Substack row in Settings → Scheduling runs the same approval.

The Eden desktop app is gaining custom-domain publishing too. Until your desktop app picks up that update, Chrome with the Eden extension handles custom-domain articles — just keep it installed and signed in.