GET http://somehostname.com/index.php?rest_route=%2Fwp%2Fv2%2Fposts&per_page=100&page=2&context=edit HTTP/1.1
Host: somehostname.com
Authorization: Basic [****base64encoded username+":"+pass *******]
Accept-Encoding: gzip, deflate
User-Agent: [some user agent name]

HTTP/1.1 401 Unauthorized
Date: Tue, 13 Feb 2018 14:26:12 GMT
Server: Apache
X-Powered-By: PHP/7.1.12
X-Robots-Tag: noindex
Link: <http://somehostname.com/wp-json/>; rel="https://api.w.org/"
X-Content-Type-Options: nosniff
Access-Control-Expose-Headers: X-WP-Total, X-WP-TotalPages
Access-Control-Allow-Headers: Authorization, Content-Type
Vary: Accept-Encoding,User-Agent
Content-Length: 127
Content-Type: application/json; charset=UTF-8

{"code":"rest_forbidden_context","message":"Sorry, you are not allowed to edit posts in this post type.","data":{"status":401}}