Add APITube to Datasets

[liamka]

Summary

Adds APITube to the Datasets section, directly after Helium and next to the other news and market data sources already listed (FinancialData.Net, NASDAQ Data Link, The GDELT Project).

Entry added:

- [APITube](https://apitube.io) - News API with real-time and historical articles from 500,000+ sources across 177 countries and 59 languages, returned as structured JSON with sentiment scores, extracted entities, topics and IPTC categories; 65+ filter parameters and CSV, JSONL or Parquet exports for offline analysis, free tier of 100 requests/day.

Why it belongs in this section: APITube is a news corpus you query rather than crawl. Each article arrives pre-enriched — sentiment score, extracted entities (people, organizations, locations, brands), IPTC categories, topics and industries — so a labelled text dataset can be pulled straight into pandas through the CSV, JSONL or Parquet export instead of scraping and annotating HTML. Historical coverage supports backtesting and longitudinal studies, and /v1/news/trends returns aggregated counts over time buckets for time-series work.

Docs: https://docs.apitube.io — free tier is 100 requests/day with no card required.

Tip Requirement (Required)

• Service or closed source: $1 monthly tip or $12 yearly tip.

That is the honest category: APITube is a commercial hosted service, not open source. Equally honestly, the tip has not been sent — I am submitting the entry itself and leaving the sponsorship decision with the project owner. If the tip is a hard requirement for a merge, say so and I will take it back to them rather than bump this PR.

Tip link acknowledged: https://github.com/sponsors/hmert

License Type (Required)

• Proprietary / Closed Source

License details: proprietary hosted API, terms at https://apitube.io/terms/terms-of-service. Free tier of 100 requests/day, paid plans from $29/month. The client SDKs are open source and MIT-licensed: https://github.com/apitube (Node.js, PHP, Python, Dart).

Your Relationship to This Project (Required)

• Owner

I work on APITube, so this is a self-promotional submission.

Checklist

• I confirm the information above is accurate.
• I have read CONTRIBUTING.md and followed the repository format: one bullet, [Name](URL) - short description, https link, no superlatives, placed next to similar entries in the section.
• I verified links and descriptions in my change. https://apitube.io returns 200; the coverage figures (500,000+ sources, 177 countries, 59 languages) come from the API's own country and language reference lists, not rounded marketing numbers.

[hmert]

@liamka thank you for your contribution. $1 monthly tip or $12 yearly tip is required for your case.