Lemmy Posts & Communities Scraper

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Scrapes posts, comments, and community data from any Lemmy instance using its public API. Works with lemmy.world, lemmy.ml, beehaw.org, or any other Lemmy server.

What data does it extract?

🎯 Use cases

• Fediverse monitoring -- Track discussions and trending topics across Lemmy instances.
• Community analytics -- Compare subscriber counts, activity, and growth across communities.
• Content research -- Collect posts on specific topics for analysis or content ideas.
• Reddit alternative tracking -- Monitor the Lemmy ecosystem as users migrate from Reddit.
• Sentiment analysis -- Gather comments from specific communities to gauge public opinion.

🚀 How to use

Hot posts from the technology community on lemmy.world:

{
"instance":"lemmy.world",
"mode":"posts",
"communities":["technology"],
"sort":"Hot",
"maxResults":100
}

Search across all communities:

{
"instance":"lemmy.world",
"mode":"search",
"searchQuery":"rust programming",
"maxResults":50
}

List the most active communities:

{
"instance":"lemmy.ml",
"mode":"communities",
"sort":"Top",
"maxResults":50
}

📥 Input

📋 Output example

{
"type":"post",
"id":12847561,
"title":"Firefox 130 released with per-site cookie controls",
"body":null,
"author":"techfan42",
"authorDisplayName":"TechFan",
"community":"technology",
"communityTitle":"Technology",
"score":487,
"upvotes":512,
"downvotes":25,
"commentCount":83,
"url":"https://blog.mozilla.org/en/firefox-130",
"postUrl":"https://lemmy.world/post/12847561",
"published":"2026-03-27T18:45:00.000Z",
"thumbnailUrl":"https://lemmy.world/pictrs/image/abc123.jpg",
"nsfw":false,
"instance":"lemmy.world",
"scrapedAt":"2026-03-28T14:00:00.000Z"
}

⚡ Performance

• Pure HTTP requests, no browser. Fetches up to 50 items per API page.
• A typical run of 100 posts finishes in under 5 seconds.
• Costs well under $0.01 per run on the Apify platform.

❓ FAQ

Can I scrape any Lemmy instance? Yes, as long as the instance has its API publicly accessible. Most Lemmy instances do by default.

What's the difference between posts mode and search mode? posts mode lists posts from the instance feed (optionally filtered by community). search mode does full-text search and returns a mix of posts, comments, and communities that match your query.

Do I need an account on the Lemmy instance? No. The actor uses the public API endpoints that don't require authentication.

Why did I get fewer results than maxResults? The instance may simply have fewer matching items than you requested. Small or new communities often have limited content.