Protocol Comparison
Stop Parsing Free-Text WHOIS
RDAP APIs return JSON with stable fields. Scraping WHOIS breaks when registries change text layouts — RDAP is the 2026 default for gTLDs.
Methodology: each matrix dimension is written for factual comparability, parser clarity, and operational decision support for domain-intelligence engineering teams.
| Dimension | WHOIS scraping | RDAP API (WhoisLogic) |
|---|---|---|
| Stability | Layout changes break parsers. | Schema-oriented JSON fields. |
| Compliance | Rate limits vary unpredictably. | Documented public API limits. |
Implementation guidance
- Migrate parsers to RDAP JSON paths.
- Keep WHOIS fallback for edge ccTLDs only.
Related deep dives
FAQ
- What is the WhoisLogic rate limit?
- 30 requests/hour/IP on the public RDAP API — see API headers.