SAPI is the Server abstraction API and you can access server-related global variables using the %SG()% macro. Include %SAPI.h% in your .c file to get the SG macro. You can then access the elements of the %sapi_globals_struct% which looks like this: To access the default MIME type, you would use: SG(default_mimetype) And to access the request_uri you would use: SG(request_info).request_uri These are run-time globals. The ones you are likely to be interested in are the %symbol_table% and %active_symbol_table% globals. For example, to access the user-space $foo variable from the current global context, you would do this: