HTTP2.Pro
Test endpoints for client and server HTTP/2 protocol support
- Authentication
- No auth
- HTTPS
- Yes
- CORS
- Unknown
- Category
- Development
- Data source
- public-apis + marcelscruz
- Documentation / URL
- https://http2.pro/doc/api
Overview
HTTP2.Pro provided HTTP/2 client-header testing (browser feature detection for HTTP/2).
⚠️ Status (verified 2026-08):
http2.pronow returns HTTP 301 toscottvinkle.me— the domain has been repurposed/transferred; the API is effectively gone. Do not build new projects on it.
What it used to provide
curl "https://http2.pro/api/v1/headers"Alternatives
- httpbin and httpbin Cloudflare (listed on this site) — request/response testing.
- Client-hint detection: BigDataCloud (listed).
FAQ
Is HTTP2.Pro working? Our 2026-08 test got a 301 to an unrelated site — the domain was repurposed.
Was it free? Yes — free and keyless.
What replaced it? httpbin / httpbin Cloudflare / BigDataCloud (all listed).
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