The newsletterapi blog
What you'll find here
25 research-backed guides on the Substack API, MCP servers for AI agents, exports, backups, integrations and fixes for the problems writers hit most. Every claim is sourced and dated, and we update posts when Substack changes things.
Guide · Developers & AI
Does Substack Have an API? The Honest 2026 Map
Substack has no general public API. Here is every official surface as of October 2026, what each returns, and what unofficial Substack API libraries risk.
10 min read · Updated 2026-10-21
Writers
Comparison · Writers
Substack vs WordPress: Which Should Writers Use?
An honest Substack vs WordPress comparison for writers: ownership, SEO, custom domains, subscription fees, APIs and plugins, and migrating either way.
6 min read · Updated 2026-10-21
Explainer · Writers
Substack RSS Feed: URL, Paid Posts and Uses
Find your Substack RSS feed URL (subdomain or custom domain), see what it includes for free and paid posts, and use it with readers, Zapier, IFTTT or a website.
5 min read · Updated 2026-10-21
How-to · Writers
Substack New Subscriber Email Has No Address? What Changed
Substack's new-subscriber notification stopped showing the email address in March 2026. What changed, what still works and how to replace Gmail automations.
5 min read · Updated 2026-10-21
How-to · Writers
Substack Import Held for Review or Denied? What to Do
Why Substack holds subscriber imports for review or denies them, which lists fail, how to prepare an import that passes, and what to do after a denial.
5 min read · Updated 2026-10-21
Explainer · Writers
Substack Analytics Explained: Every Dashboard Metric
What each Substack dashboard stat means, from open rate to retention cohorts, what is missing, and how to analyse your own export or connect Google Analytics.
6 min read · Updated 2026-10-21
How-to · Writers
Substack Account Suspended? How to Protect Your Subscribers
What happens to your list and posts if Substack suspends or bans you, how to appeal, and the routine exports and backups that protect you before it happens.
6 min read · Updated 2026-10-21
How-to · Writers
How to Publish to Substack from Markdown or Obsidian
Substack's editor doesn't support Markdown. Honest workflows to move drafts from Obsidian or Markdown into Substack, with formatting, images and code intact.
5 min read · Updated 2026-10-21
How-to · Writers
Import Posts to Substack: WordPress, Medium and Markdown
Which platforms Substack's post importer supports, how to import from WordPress, Medium, Ghost or Mailchimp, and what to do with Markdown or Google Docs.
5 min read · Updated 2026-10-21
How-to · Writers
How to Back Up Your Substack: Posts, List and Images
Back up your Substack step by step: the posts zip, the subscriber CSV, what the export leaves out, how often to run it, and where to store it safely.
7 min read · Updated 2026-10-21
How-to · Writers
Export Substack Subscribers (and Move Them to Kit)
Export your Substack subscriber list as a CSV, see what the columns contain, and move it to Kit, Mailchimp or HubSpot with consent and deliverability intact.
6 min read · Updated 2026-10-21
How-to · Writers
How to Embed Substack Posts on Your Website
Every way to embed Substack on your site: the post and Note embed code, the signup form iframe, RSS-based post lists, and why browser fetches fail.
5 min read · Updated 2026-10-21
How-to · Writers
How to Connect Claude to Substack (2026 Guide)
Step-by-step: connect Claude to Substack with the official connector if you're a Bestseller, plus safe options for everyone else, and what to ask it.
6 min read · Updated 2026-10-21
How-to · Writers
How to Add Subscribers to Substack Without Getting Blocked
Add or import subscribers to Substack the safe way: CSV import steps, the 72-hour review, consent rules, the signup embed, lead forms and Meta ads.
6 min read · Updated 2026-10-21
Teams & agencies
How-to · Teams & agencies
How to Sync Substack Subscribers to Kit or HubSpot
Substack has no Kit or HubSpot integration in October 2026. Honest sync options: export-and-import cadence, field mapping, consent and unsubscribes.
6 min read · Updated 2026-10-21
How-to · Teams & agencies
Does Substack Have Webhooks? What to Use Instead
Substack has no webhooks as of October 2026. Here is the best signal for each event (new post, new subscriber, paid, cancel) and how fast it arrives.
5 min read · Updated 2026-10-21
Explainer · Teams & agencies
Substack Statistics 2026: Users, Revenue and Funding
Sourced Substack statistics for October 2026: paid subscriptions, readers, funding, valuation, fees, revenue estimates and traffic, each labelled by source.
5 min read · Updated 2026-10-21
How-to · Teams & agencies
What Does the Meta Pixel Track on Substack?
You added your Meta pixel to Substack but can't see what it tracks. Which events fire, how to verify them in Events Manager, and the limits as of October 2026.
5 min read · Updated 2026-10-21
Integration · Teams & agencies
Substack Integrations in 2026: What Works and What Doesn't
Substack has no Zapier, Make or n8n app as of October 2026. Here is what does connect: RSS, IFTTT, Buffer, GA4, GTM, Meta pixel and your own export.
7 min read · Updated 2026-10-21
Explainer · Teams & agencies
Why Don't My Substack and Stripe Numbers Match?
Substack and Stripe count paid subscribers and revenue differently: fees, coupons, iOS in-app sales, comps, gifts, refunds, currency and timing. Reconcile them.
5 min read · Updated 2026-10-21
How-to · Teams & agencies
Facebook Lead Ads to Substack: How to Get Leads In
Running Meta ads for your Substack but stuck moving leads in by hand? Consent-first setups: landing page plus signup embed, opt-in relay, batch import, pixel.
5 min read · Updated 2026-10-21
Developers & AI
Comparison · Developers & AI
Substack MCP Server: Official vs Open Source (2026)
Compare Substack's official MCP server, open-source Substack MCP servers and hosted ones: who can use each, what they read or write, and the risks.
6 min read · Updated 2026-10-21
Explainer · Developers & AI
Why Does My Substack Script Get a 403 Error?
Substack 403s scripts that try to post, schedule or log in. Why it happens, why workarounds risk your account, and the legal routes that still work.
5 min read · Updated 2026-10-21
Comparison · Developers & AI
Newsletter Platforms With an API: 2026 Comparison
Which newsletter platforms have an API? Substack, beehiiv, Kit, Ghost, Buttondown, Mailchimp and MailerLite compared on read/write, webhooks, plans and MCP.
6 min read · Updated 2026-10-21
Comparison · Developers & AI
Newsletter MCP Servers Compared: beehiiv, Kit, Mailchimp
beehiiv, Kit, Mailchimp, MailerLite, Ghost, Buttondown and Substack MCP servers compared: official vs community, read/write tools, auth and plan gating.
6 min read · Updated 2026-10-21