# POST: Add a Node to the Cluster
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## HTTP Request and Response
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### Request URL
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Add a node to the cluster.

```
POST http://<Conductor IP address>/nodes
```

### Request Body
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The request body is XML content consisting of one `hosts` element (of type “array”) that contains: 
+ One or more `host` elements, one for each node found. Each element contains:
  + One IP address.
  + A range of IP addresses (for example, 10.4.136.[90-92]).

### Call Header
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+ Accept: Set to `application/xml`
+ Content-Type: Set to `application/xml`

If you are implementing user authentication, you must also include three authorization headers; see [Header Content for User Authentication](header-content-user.md). 

### Response
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No response is supplied for a successful node addition. Operators should perform the GET Node operation to confirm that the node has been added successfully. For assistance, see [GET: Get the Attributes of a Node](set-up-nodes-get-attributes-of-node.md).

## Example
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### Request
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This request adds four nodes: 10.4.136.15, 10.4.136.90, 10.4.136.91, 10.4.136.92.

```
POST http://198.51.100.0/nodes
------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<hosts type="array">
  <host>10.4.136.15</host>
  <host>10.4.136.[90-92]</host>
</hosts>
```