Trust signals
Pricing
FREE
Auth
UNKNOWN
CORS
Yes
Rate limit
45 requests/minute
Health
699ms
Trust score
89 (B)
Last checked Oct 19, 2026 · uptime 24h 100% / 7d 100% / 30d 100%
Strong candidate; weakest signal is OpenAPI availability.
Links
- Homepagedeveloper.uspto.gov
- Documentationdeveloper.uspto.gov/api-catalog
- Base URLdeveloper.uspto.gov/api-catalog
Integration checklist
- Auth is UNKNOWN— no credit card required
- CORS enabled — callable directly from browsers.
- Rate limit: 45 requests/minute