wp_remote_post wp_remote_request file upload

file.php

<?php

// wp_remote_request way
$file = @fopen( 'path/to/file.txt', 'r' );
$file_size = filesize( 'path/to/file.txt' );
$file_data = fread( $file, $file_size );
$args = array(
	'method' 	  => 'POST'
	'headers'     => array(
		'accept'        => 'application/json', // The API returns JSON
		'content-type'  => 'application/binary', // Set content type to binary
	),
	'body'        => $file_data
);
$result = wp_remote_request(  'https://domain.com/api/v2/uploads.json?filename=myfile.dat' $args );

// wp_remote_post way
$file = @fopen( 'path/to/file.txt', 'r' );
$file_size = filesize( 'path/to/file.txt' );
$file_data = fread( $file, $file_size );
$args = array(
	'headers'     => array(
		'accept'        => 'application/json', // The API returns JSON
		'content-type'  => 'application/binary', // Set content type to binary
	),
	'body'        => $file_data
);
$result = wp_remote_post(  'https://domain.com/api/v2/uploads.json?filename=myfile.dat' $args );
?>