AI & Research
Leverage Substack as a rich source of expert-written content for AI and research applications. Use the Post Content API to feed full articles into LLMs for summarization, analysis, or RAG pipelines. Build training datasets from comment threads, run sentiment analysis across reader reactions, or create knowledge bases from specific publication niches.
How it works
Define your corpus
Choose publications relevant to your research domain. Use the Publications API to verify coverage and author expertise.
Extract text content
Paginate through posts and fetch full plaintext content. The API handles HTML-to-text conversion automatically.
Enrich with metadata
Combine post content with engagement metrics, author profiles, and comment threads for richer context.
Feed your pipeline
Pipe structured content into your LLM, vector database, or analysis framework. Use pagination for batch processing.
Endpoints used
Related
Post Content API
Get the complete body of any Substack post. Returns content in both HTML and plaintext formats with ...
Comments API
Retrieve the full comment thread tree for any Substack post. Comments include nested replies, author...
Content Aggregation
Build RSS-like feeds, curated digest emails, or unified dashboards pulling from multiple Substack pu...
Start building today
Create a free account and start pulling structured Substack data in minutes.