Use the following code to customize the headers sent with your API request.

add_filter( 'frm_api_request_args', 'my_custom_frm_api_request_header', 10, 2 );

function my_custom_frm_api_request_header( $arg_array, $args ) {

  if ( $args['url'] == 'http://test.com' ) { // the full url where the request is being sent

    $arg_array['headers']['my_header_name'] = 'my_header_value';

    $arg_array['headers']['another_header_name'] = 'a_header_value';

  }

  return $arg_array;

}

The existing headers include 'url', 'headers', 'body', 'method', and 'timeout'.

See WP_Http::request() for default arguments information.

By default, there is a 15 second timeout for API actions. To increase the timeout for API actions, use the following code example.

add_filter( 'frm_api_request_args', 'extend_api_timeout' );

function extend_api_timeout( $args ) {

    $args['timeout'] = 30; // change this

    return $args;

}