Top USPTO API Catalog Alternatives & Similar APIs (2026)
Looking for alternatives to USPTO API Catalog? Compare 8 verified free and public APIs in the government category with rate limits, auth methods, and ready-to-use snippets.
Alternatives Feature Comparison
8 Options| API Service | Auth Type | Rate Limit | CORS | Action |
|---|---|---|---|---|
| Data.gov | Free Key | 1000 req/hour | HTTPS • CORS | Explore |
| Data.gov.uk | No Key (Zero-Auth) | Unlimited | HTTPS • CORS | Explore |
| NASA | Free Key | 1000 req/hour | HTTPS • CORS | Explore |
| FDA | Free Key | 40 req/min | HTTPS • CORS | Explore |
| UK Police | No Key (Zero-Auth) | 15 req/sec | HTTPS • CORS | Explore |
| World Bank | No Key (Zero-Auth) | Unlimited | HTTPS • CORS | Explore |
| EU Open Data | No Key (Zero-Auth) | Unlimited | HTTPS • CORS | Explore |
| Census.gov | Free Key | 500 req/day | HTTPS • CORS | Explore |
Detailed Breakdown of USPTO API Catalog Alternatives
Data.gov
US Federal Government open datasets spanning agriculture, energy, and economics
Data.gov.uk
UK Government official open data repository for public spending and transit
NASA
Official NASA open datasets including space photography and planetary telemetry
FDA
US FDA drug approvals, adverse reaction events, and food safety recalls
UK Police
UK Police crime statistics, neighborhood safety rankings, and street records
World Bank
World Bank global economic development indicators, GDP, and poverty metrics
EU Open Data
European Union open data catalog covering EU legislation, stats, and policies
Census.gov
US Census Bureau official demographic, social, and economic dataset APIs
Choosing the Best Alternative to USPTO API Catalog
Which alternative is quickest to start?
Alternatives labeled "Zero-Auth" do not require registration or API keys. You can swap your endpoint URL and test in minutes without creating provider accounts.
Are these alternatives free for production?
All listed alternatives offer legitimate free tiers or open data licenses. Review the specific rate limits on each API detail page to ensure your traffic stays within quota.