I'm currently building a prototype to post data from Wordpress to a Rightmove RESTful JSON API (a rental/property website in the UK - specifically the Real Time Datafeed)
Was pretty impressed that Wordpress had the HTTP API actually, but upon digging deeper I've realised it seems to be lacking a fair few things (documentation being one!)
Does the HTTP API support mutual authentication and SSL in any way? Specifically the mutual authentication part? As this is a requirement of the API given the sensitive nature of the data.
All I can find is that it can support SSL but nothing to do with client certificates, and basic authentication.
I'm far from an expert in these things but I'm thinking I need to go down the pure PHP route using fsock/curl