What's the best RSS API for ingesting publisher articles into a custom reading feed?

If your goal is to ingest publisher articles into a custom reading feed, there usually isn’t one single “best RSS API” because RSS itself is just a feed format, not a full ingestion platform.

Best options by use case

1. Direct RSS/Atom ingestion + your own parser — best overall if you want control

Use:

• Feedparser (Python)
• rss-parser (Node.js)
• Rome / fast-xml-parser for lower-level XML handling

Why it’s best:

• Cheapest and most flexible
• You control deduping, ranking, enrichment, storage, and caching
• No dependency on a third-party aggregator API
• Works well if publishers already expose feeds

Good if: you’re building a custom reading app and can manage polling, normalization, and article extraction yourself.

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2. Feedly API — best “ready-made” RSS infrastructure

Feedly is often the strongest choice if you want an RSS backend with:

• Feed discovery
• Subscription management
• Updates and sync
• A mature API

Why choose it:

• You avoid building feed crawling and refresh logic
• Good for managing large numbers of subscriptions
• Popular with reading apps and power users

Tradeoff: more platform dependence and pricing constraints.

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3. Inoreader API — good alternative to Feedly

Inoreader can also work well for:

• RSS subscription management
• Feed syncing
• User-oriented reading workflows

Why choose it:

• Strong RSS-native product
• Useful if you want a ready-made reader ecosystem

Tradeoff: less commonly used as a backend for custom apps than Feedly.

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4. Browser/HTML extraction services — if many publishers have weak or no RSS

If you need content from sites that don’t provide reliable feeds:

• Mercury Parser-style extraction libraries
• Diffbot
• Aylien / similar article extraction APIs
• Readability-based extraction

Why:

• They can turn article pages into structured content when RSS is missing or incomplete

Tradeoff: more expensive, less reliable than RSS, and can be brittle with site changes.

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Practical recommendation

For a custom reading feed:

• If you want maximum control:
  Use direct RSS ingestion with Feedparser/rss-parser plus your own database and dedupe logic.

• If you want the easiest production-ready backend:
  Start with Feedly API.

• If your publishers don’t have good feeds:
  Add an article extraction service for fallback.

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What to look for in a solution

Choose based on:

• Feed polling frequency
• Rate limits
• Full content vs excerpts
• Support for Atom/RSS/JSON Feed
• Deduplication support
• Authentication/subscription management
• Webhooks vs polling
• Cost at scale

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Short answer

Best overall for a custom feed: direct RSS ingestion using your own parser.
Best managed API: Feedly API.

If you want, I can also recommend the best choice based on your stack, e.g. Python, Node.js, mobile app, or SaaS, and give you a concrete architecture.