# Prerequisites

{% hint style="info" %} <mark style="color:blue;">**Default HTTP Request Headers**</mark>
{% endhint %}

<table data-full-width="false"><thead><tr><th width="154.33333333333331">Header</th><th width="213">Value</th><th>Note</th></tr></thead><tbody><tr><td>Authorization</td><td>Bearer &#x3C;<a href="authentication-api">access_token</a>></td><td><em>For all APIs, excluding</em> <a href="authentication-api"><em>Authenticate API</em></a></td></tr><tr><td>Content-Type</td><td>application/json</td><td><em>Request / Response Payloads in JSON</em></td></tr><tr><td>uuid</td><td>&#x3C;valid_uuid_v4></td><td><em>Optional reference, follows uuid-v4 format</em></td></tr></tbody></table>

{% hint style="warning" %} <mark style="color:orange;">**All HTTP Methods**</mark> **POST**
{% endhint %}

{% hint style="warning" %} <mark style="color:red;">**All HTTP Body Format**</mark>**&#x20;JSON**
{% endhint %}

{% hint style="info" %}
**For API Responses:**

Note that if you send the uuid in the Request Headers, you will get it back in the reponse body, else an autogenerated uuid will be returned.\
UUIDs are beneficial for tracing and support purpose.&#x20;
{% endhint %}

<table data-view="cards"><thead><tr><th></th><th></th><th></th></tr></thead><tbody><tr><td><strong>Status Codes:</strong></td><td><ul><li><strong>200 OK</strong>: <em>Call Executed</em> </li><li><strong>Other</strong> Status Codes: network/protocols, or unexpected non business errors</li></ul></td><td></td></tr><tr><td><strong>Business Success:</strong> </td><td><ul><li>JSON Result:</li></ul><p>{ </p><p>    "<strong>success</strong>": { </p><p>        "message": "&#x3C;msg>", </p><p>        "data": &#x3C;json> </p><p>    },<br>    "<strong>uuid</strong>" : "&#x3C;uuid_v4>" </p><p>}</p></td><td></td></tr><tr><td><strong>Business Error:</strong> </td><td><ul><li>JSON Result:</li></ul><p>{ </p><p>    "<strong>error</strong>": { </p><p>        "message": "&#x3C;msg>", </p><p>        "data": &#x3C;json> </p><p>    },</p><p>    "<strong>uuid</strong>" : "&#x3C;uuid_v4>" </p><p>}</p></td><td></td></tr></tbody></table>