Texavor
Texavor
DOCSPLATFORMSSUBSTACK INTEGRATION

Substack Integration

Publish your technical newsletters seamlessly to Substack directly from Texavor. We handle the formatting so you can focus on building your subscriber base.

Last Updated: Recently

The simplified newsletter workflow.

Texavor connects to your Substack account to create drafts and publish content instantly. Since Substack doesn't have a public API, we use a secure cookie-based connection that mimics your browser session.

Substack Integration

Features

  • Smart Auth: We automatically detect your User ID, so you don't have to find it manually.
  • Markdown Support: We send high-fidelity Markdown directly, preserving your formatting.
  • Instant Publishing: Choose to save as a draft or go live immediately.
  • Cover Images: We automatically prepend your article's cover image to the post.

1. Get Your Session Cookie

Substack requires a valid session cookie (substack.sid) to authenticate.

  1. Open Substack.com in your browser and log in.
  2. Open Developer Tools:
    • Right-click anywhere and select Inspect.
    • Or press F12 (Windows) / Cmd+Option+I (Mac).
  3. Find the Cookie:
    • Go to the Application tab (Chrome/Edge) or Storage tab (Firefox).
    • Expand Cookies in the sidebar.
    • Click on https://your-subdomain.substack.com.
    • Find the cookie named substack.sid.
  4. Copy the Value: It’s a long string starting with s%3A.... Copy the entire value.

[!NOTE] Cookies expire periodically (usually every 30 days). If publishing fails with "403 Not Authorized", simply repeat this step to update your cookie.

2. Connect in Texavor

  1. Navigate to Integrations.
  2. Click Connect on the Substack card.
  3. Subdomain: Enter just the name (e.g., texavor for texavor.substack.com).
  4. Session Cookie: Paste the substack.sid value you copied.
  5. Click Connect.

We will automatically fetch and verify your User ID when you save. You should see a success message: "Connected! Found User ID: 12345..."

3. Publishing Workflow

When you click Deploy:

  1. Select [x] Substack.
  2. Save as Draft:
    • Yes (Default): Creates a draft in Substack for you to review.
    • No: Publishes the post immediately to your live newsletter.
  3. Audience: Choose "Everyone", "Paid Subscribers", or "Founders".
  4. Send Email: Check this if you want to email the post immediately (only works if publishing immediately).

Your article will appear in your Substack Dashboard!

Support & Resources

Need help publishing your content strategy?

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