Using SemanticProxy.com programmatically requires a Calais API key. You can get yours by registering at the Calais site. If you already have a Calais access key - it will work fine for SemanticProxy.
Using SemanticProxy.com is very simple - it follows the Standard for publishing Linked Data on the web. Use the tool below to explore formatting options for your call.
SemanticProxy.com is in Beta. No guarantees, no promises.