Amazon MWS Order API timestamp must follow ISO8601

Question

I am using Amazon MWS order API (ListOrders) and I can successfully run it on Amazon Scratchpad but I am getting the following error Sender MalformedInput timestamp must follow ISO8601 Below is the php script which I got from some Stackoverflow post ``` $base_url = "https://mws.amazonservices.com/Orders/2013-09-01"; $method = "POST"; $host = "mws.amazonservices.com"; $uri = "/Orders/2013-09-01"; $params = array( 'AWSAccessKeyId' => "AWSAccessKeyId", 'Action' => "ListOrders", 'SellerId' => "SellerId", 'SignatureMethod' => "HmacSHA256", 'SignatureVersion' => "2", //'Timestamp'=> gmdate("Y-m-d\TH:i:s.\0\0\0\Z", time()), 'Timestamp'=> gmdate("Y-m-d\TH:i:s\Z", time()), 'Version'=> "2013-09-01", 'MarketplaceId' => "MarketplaceId", 'CreatedAfter'=>'2014-07-06T19%3A00%3A00Z', 'CreatedBefore'=>'2014-07-08T19%3A00%3A00Z' ); // Sort the URL parameters $url_parts = array(); foreach(array_keys($params) as $key) $url_parts[] = $key . "=" . str_replace('%7E', '~', rawurlencode($params[$key])); s…

Accepted Answer

You are sending three date values:

```
'Timestamp'=> gmdate("Y-m-d\TH:i:s\Z", time()),
'CreatedAfter'=>'2014-07-06T19%3A00%3A00Z',
'CreatedBefore'=>'2014-07-08T19%3A00%3A00Z'
```

For a start, you can get rid of the second parameter to `gmdate()` since it defaults to `time()` anyways. Other than that it's fine and should not be the cause of your problem.

The other two parameters have url encoded characters (the colon is encoded as `%3A`) which you then send through `rawurlencode()` to encode once more. That will replace the percent sign of above encoing with `%25`. The `CreatedAfter` value you are actually sending to Amazon for `CreatedAfter` is therefore `2014-07-06T19%253A00%253A00Z`. Try this instead:

```
'Timestamp'=> gmdate("Y-m-d\TH:i:s\Z"),
'CreatedAfter'=>'2014-07-06T19:00:00Z',
'CreatedBefore'=>'2014-07-08T19:00:00Z'
```

Amazon MWS Order API timestamp must follow ISO8601

Solution

Problem