Substack
App · Publishing & Community · 4 actions
Read public Substack publications through their official RSS feeds. List and search recent posts (with full content), fetch publication metadata, and track podcast episodes. Read-only and keyless: no Substack account or API key is required.
Actions
| Action | What it does |
|---|---|
| Get Substack publication info | Look up a Substack publication's public feed metadata: its title, description, homepage URL, author, cover image, language, and how many posts are currently in the feed. |
| List recent Substack posts | List the most recent posts from a Substack publication, newest first, with each post's title, URL, author, publish date, summary, and full content (as both HTML and plain text). |
| List Substack podcast episodes | List a Substack publication's most recent podcast episodes: the feed items that carry an audio file. |
| Search Substack posts | Search a Substack publication's recent posts for a keyword or phrase. |
Get Substack publication info
Look up a Substack publication's public feed metadata: its title, description, homepage URL, author, cover image, language, and how many posts are currently in the feed. Useful for confirming a publication exists and grabbing its display details before pulling posts.
Inputs
- Publication
publicationtextRequired - The Substack publication to read. Use the subdomain (e.g. 'platformer'), the full Substack URL (e.g. 'https://newsletter.pragmaticengineer.com'), or a custom domain. A trailing '/feed' is optional.
Outputs
Channel-level metadata for the publication feed.
authortext- Publication author / managing editor. May be empty.
descriptiontext- Publication tagline / description.
feed_urltext- The resolved RSS feed URL that was fetched.
image_urltext- Publication cover/logo image URL. May be empty.
languagetext- Feed language code, e.g. 'en'. May be empty.
last_build_datetext- When the feed was last built (RFC 822). May be empty.
post_count_in_feednumber- Number of posts currently present in the feed.
titletext- Publication name.
urltext- Publication homepage URL.
Example output
{
"author": "Casey Newton",
"description": "Casey Newton on the intersection of tech and democracy.",
"feed_url": "https://www.platformer.news/feed",
"image_url": "https://substackcdn.com/image/fetch/platformer-logo.png",
"language": "en",
"last_build_date": "Wed, 15 Jul 2026 14:03:11 GMT",
"post_count_in_feed": 20,
"title": "Platformer",
"url": "https://www.platformer.news"
}List recent Substack posts
List the most recent posts from a Substack publication, newest first, with each post's title, URL, author, publish date, summary, and full content (as both HTML and plain text). Use this to pull a newsletter's latest articles into a workflow, for example to summarize the newest post or repost it elsewhere.
Inputs
- Publication
publicationtextRequired - The Substack publication to read. Use the subdomain (e.g. 'platformer'), the full Substack URL (e.g. 'https://newsletter.pragmaticengineer.com'), or a custom domain. A trailing '/feed' is optional.
- Limit
limitnumber - Maximum number of items to return, from 1 to 50. Defaults to 10. Substack feeds usually carry only the ~20 most recent posts, so higher values are capped by what the feed exposes.From 1 to 50.
Outputs
Recent posts with full content, newest first. Paywalled posts include only their free preview in content_html/content_text.
countnumber- Number of posts returned.
feed_urltextpostslistpublicationobject
Example output
{
"count": 2,
"feed_url": "https://www.platformer.news/feed",
"posts": [
{
"author": "Casey Newton",
"content_html": "<p>This week, the first wave of truly autonomous agents shipped...</p>",
"content_text": "This week, the first wave of truly autonomous agents shipped...",
"guid": "https://www.platformer.news/p/ai-agent-reckoning",
"is_podcast": false,
"published": "Wed, 15 Jul 2026 14:03:11 GMT",
"summary": "What happens when agents start doing real work.",
"title": "The AI agent reckoning arrives",
"url": "https://www.platformer.news/ai-agent-reckoning"
},
{
"author": "Casey Newton",
"content_html": "<p>The major platforms unveiled...</p>",
"content_text": "The major platforms unveiled...",
"guid": "https://www.platformer.news/p/platforms-election",
"is_podcast": false,
"published": "Mon, 13 Jul 2026 13:00:00 GMT",
"summary": "New policies, familiar problems.",
"title": "How platforms handle the election",
"url": "https://www.platformer.news/platforms-election"
}
],
"publication": {
"title": "Platformer",
"url": "https://www.platformer.news"
}
}List Substack podcast episodes
List a Substack publication's most recent podcast episodes: the feed items that carry an audio file. Each episode includes its title, URL, publish date, summary, and audio details (direct file URL, MIME type, size, duration, and episode/season numbers). Useful for tracking a Substack podcast or pulling the latest episode's audio into a workflow.
Inputs
- Publication
publicationtextRequired - The Substack publication to read. Use the subdomain (e.g. 'platformer'), the full Substack URL (e.g. 'https://newsletter.pragmaticengineer.com'), or a custom domain. A trailing '/feed' is optional.
- Limit
limitnumber - Maximum number of items to return, from 1 to 50. Defaults to 10. Substack feeds usually carry only the ~20 most recent posts, so higher values are capped by what the feed exposes.From 1 to 50.
Outputs
Recent podcast episodes (feed items with an audio enclosure), newest first.
countnumberepisodeslistfeed_urltextpublicationobject
Example output
{
"count": 1,
"episodes": [
{
"audio": {
"duration": "58:12",
"episode": 123,
"length_bytes": 48210432,
"season": 4,
"type": "audio/mpeg",
"url": "https://api.substack.com/feed/podcast/ep123.mp3"
},
"author": "Ezra Klein",
"guid": "https://www.ezraklein.substack.com/p/ai-boom-workers",
"is_podcast": true,
"published": "Tue, 14 Jul 2026 09:00:00 GMT",
"summary": "A conversation about labor and automation.",
"title": "What the AI boom means for workers",
"url": "https://www.ezraklein.substack.com/ai-boom-workers"
}
],
"feed_url": "https://www.ezraklein.substack.com/feed",
"publication": {
"title": "The Ezra Klein Show",
"url": "https://www.ezraklein.substack.com"
}
}Search Substack posts
Search a Substack publication's recent posts for a keyword or phrase. Matches the title, summary, author, and full text of each post in the feed (case-insensitive) and returns the matching posts. Because Substack's feed only carries the most recent ~20 posts, this searches recent posts, not the full archive.
Inputs
- Publication
publicationtextRequired - The Substack publication to read. Use the subdomain (e.g. 'platformer'), the full Substack URL (e.g. 'https://newsletter.pragmaticengineer.com'), or a custom domain. A trailing '/feed' is optional.
- Search query
querytextRequired - The keyword or phrase to look for across recent posts.
- Limit
limitnumber - Maximum number of items to return, from 1 to 50. Defaults to 10. Substack feeds usually carry only the ~20 most recent posts, so higher values are capped by what the feed exposes.From 1 to 50.
Outputs
Posts from the feed whose text contains the query. Heavy content_html is omitted from search hits; fetch it with 'List recent Substack posts' once the target post is known.
countnumberfeed_urltextpostslistpublicationobjectquerytext
Example output
{
"count": 1,
"feed_url": "https://www.platformer.news/feed",
"posts": [
{
"author": "Casey Newton",
"content_text": "This week, the first wave of truly autonomous agents shipped...",
"guid": "https://www.platformer.news/p/ai-agent-reckoning",
"is_podcast": false,
"published": "Wed, 15 Jul 2026 14:03:11 GMT",
"summary": "What happens when agents start doing real work.",
"title": "The AI agent reckoning arrives",
"url": "https://www.platformer.news/ai-agent-reckoning"
}
],
"publication": {
"title": "Platformer",
"url": "https://www.platformer.news"
},
"query": "agent"
}