Exemplo de formulário para incluir tarefas

Segue abaixo um exemplo em html de um formulário para a inclusão de tarefas:

<iframe name="frame" id="frame" style="display: none;"></iframe>
<form action="https://assinamais.com.br/api_services/insert_task" method="get" target="frame" onsubmit="this.submit(); this.reset(); return false">
	<fieldset>
		<legend>Formulário Tarefa</legend>
	<table>
	<tr>
		<td><input type="text" name="client_id" id="client_id" value="<client_id>" hidden required/></td>
    </tr>
    <tr>
    	<tr><td><input type="text" name="keys" id="keys" value="<keys>" hidden required/></td></tr>
    </tr>
    <tr>
    	<tr><td><input type="text" name="merchant_token" id="merchant_token" value="<merchant_tokens>" hidden required/></td></tr>
    </tr>
    <tr>
    	<td class="tdLabel"><label for="email_address" class="label">Email:</label></td>
    	<tr><td><input type="email" name="email_address" id="email_address" style="width:300px; height: 22px; margin-bottom: 5px" required/></td></tr>
    </tr>
    <tr>
    	<td class="tdLabel"><label for="customer_name" class="label" style="margin-top: auto;">Nome:</label></td>
    	<tr><td><input type="text" name="customer_name" id="customer_name" style="width:300px; height: 22px; margin-bottom: 5px" required/></td></tr>
    </tr>
    <tr>
    	<td class="tdLabel"><label for="delivery_date" class="label"> Data da entrega:</label></td>
    	<tr><td><input type="datetime-local" name="delivery_date" style="width:250px; height: 22px; font-size: 15px; margin-bottom: 5px" required></td></tr>
    </tr>
    <tr>
    	<td class="tdLabel"><label for="delivery_address" class="label">Endereço do destino:</label></td>
    	<tr><td><input type="text" name="delivery_address" value="" id="delivery_address" style="width:300px; height: 22px; margin-bottom: 5px" required/></td></tr>
    </tr>
    <tr>
    	<td class="tdLabel"><label for="task_description" class="label">Descrição da tarefa:</label></td>
    	<tr><td><textarea name="task_description" value="" id="task_description" style="width:450px; height: 200px; margin-bottom: 5px"></textarea></td></tr>
    </tr>
    <tr>
    	<td class="tdLabel"><label for="phone" class="label">Telefone:</label></td>
    	<tr><td><input type="tel" name="contact_number" value="" id="contact_number" style="width:160px; height: 22px; margin-bottom: 5px"/></td></tr>
    </tr>
    <tr>
    	<td colspan="2"><input type="submit" id="registrarCliente" value="Incluir tarefa" style="width:100px; height: 27px; margin-top: 10px;"/></td>
    </tr>
    </table>
    </fieldset>
</form>
em API