This is additonal http logging taken when verifying the access + secret key:
Remote Address:xx.xxx.xx.xxx:80
Request URL:https://wp.test.net/wp-admin/admin-ajax.php?action=lift_setting&setting=credentials&nonce=0b16b2aca9
Request Method:POST
Status Code:400 Bad Request
Request Headersview parsed
POST /wp-admin/admin-ajax.php?action=lift_setting&setting=credentials&nonce=0b16b2aca9 HTTP/1.1
Host: wp.test.net
Connection: keep-alive
Content-Length: 188
Accept: application/json, text/javascript, */*; q=0.01
Origin: https://wp.test.net
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.116 Safari/537.36
X-HTTP-Method-Override: PUT
Content-Type: application/x-www-form-urlencoded
DNT: 1
Referer: https://wp.test.net/wp-admin/options-general.php?page=lift-search
Accept-Encoding: gzip,deflate,sdch
Accept-Language: nl-NL,nl;q=0.8,en-US;q=0.6,en;q=0.4,de;q=0.2
Cookie: wordpress_6cf1e9f14312c6ad0e649ff5369d143a=XXXXXX%7C1398118448%7Cd33ece68fa286d92844a9b8d92c17de3; wordpress_test_cookie=WP+Cookie+check; wordpress_logged_in_6cf1e9f14312c6ad0e649ff5369d143a=XXXXXX%7C1398118448%7C1bde216eb59056464f916078a5025812; wp-settings-time-1=1397945651
Query String Parametersview sourceview URL encoded
action:lift_setting
setting:credentials
nonce:0b16b2aca9
Form Dataview sourceview URL encoded
model:{“id”:”credentials”,”value”:{“accessKey”:”XXXXXXXXXXXXXXXXXXXX”,”secretKey”:”XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX”}}
_method:PUT
Response Headersview parsed
HTTP/1.1 400 Bad Request
Date: Sat, 19 Apr 2014 22:14:37 GMT
Server: Apache
Access-Control-Allow-Origin: *
Access-Control-Allow-Credentials: true
X-Robots-Tag: noindex
X-Content-Type-Options: nosniff
Expires: Wed, 11 Jan 1984 05:00:00 GMT
Cache-Control: no-cache, must-revalidate, max-age=0, public
Pragma: no-cache
X-Frame-Options: SAMEORIGIN
Vary: Accept-Encoding
Content-Encoding: gzip
Node: Hardy
X-UA-Compatible: IE=Edge,chrome=1
Content-Length: 192
Connection: close
Content-Type: application/json