simkog

Check whether is wordpress.org plugin library is reachable by your website host. This plugin sends a small curl request to check that your website can communicate with api.wordpress.org.

Check Update Servers

Check whether is wordpress.org plugin library is reachable by your website host. This plugin sends a small curl request to check that your website can …

Abyss.Cong

A plug-in which helps you solve the problems like ‘WordPress could not establish a secure connection to WordPress.org.’ caused by PHP Curl. 
Sometimes the setting of network is complicated and uncontrollable, and users may meet the problems like ‘WordPress could not establish a secure connection to WordPress.org.’ while downloading themes, plug-ins and updating the WordPress. And this plug-in could help fix most of the problems. 
Topic related: https://wordpress.org/support/topic/error-wordpress-could-not-establish-a-secure-connection-to-wordpress-org/ 
And thanks to Samuel Wood (https://wordpress.org/support/users/otto42/) and Steve Stern (https://wordpress.org/support/users/sterndata/).
Thrid party service we use: 
We use free Http DNS service of Tencent company to resolve domain more accurately and avoid domain hijacking, and we just send the domain to 119.29.29.29 and fetch the resolve result. We respect your privacy and you can clearly figure out how the function SCP_Gethostbyname which is involved in the third party service works via its source code.

SaFly Curl Patch

Thanks for the installation!

A plug-in which helps you solve the problems like 'WordPress could not establish a secure connection to WordPress.org.' caused by PHP Curl.

Check Update Servers vs SaFly Curl Patch