Companion

Unencrypted, unauthenticated connections for http: URLs.

A backwards-compatible fallback configuration that works on obsolete client platforms and can connect to obsolete servers. When possible, prefer to upgrade your client platform or server rather than using this configuration.

A modern TLS configuration that works on most client platforms and can connect to most servers. This is OkHttp's default configuration.

A secure TLS connection that requires a recent client platform and a recent server.