| aggregator_refresh | modules/aggregator/aggregator.module | Checks a news feed for new items. |
| drupal_http_request | includes/common.inc | Perform an HTTP request. |
| openid_association | modules/openid/openid.module | Attempt to create a shared secret with the OpenID Provider. |
| openid_discovery | modules/openid/openid.module | Perform discovery on a claimed ID to determine the OpenID provider endpoint. |
| openid_verify_assertion | modules/openid/openid.module | Attempt to verify the response received from the OpenID Provider. |
| system_check_http_request | modules/system/system.module | Checks whether the server is capable of issuing HTTP requests. |
| _update_refresh | modules/update/update.fetch.inc | Fetch project info via XML from a central server. |
| _xmlrpc | includes/xmlrpc.inc | Execute an XML remote procedural call. This is private function; call xmlrpc()
in common.inc instead of this function. |
