I call the below rest api with post body to create a namespace in kubernetes

http://kuberneteshot/api/v1/namespaces/

{
    "apiVersion": "v1",
    "kind": "Namespace",
    "metadata": {
        "name": "testnamespace"
    }
}

In response i get the http status 201 created and the below json response

{
    "kind": "Namespace",
    "apiVersion": "v1",
    "metadata": {
        "name": "testnamespace",
        "selfLink": "/api/v1/namespaces/testnamespace",
        "uid": "701ff75e-5781-11e6-a48a-74dbd1a0fb73",
        "resourceVersion": "57825525",
        "creationTimestamp": "2016-08-01T00:46:52Z",
    },
    "spec": {
        "finalizers": [
            "kubernetes"
        ]
    },
    "status": {
        "phase": "Active"
    }
}

Does the status in response with phase as Active mean the namespace is successfully created and active ?

Is there any other rest api to check if the namespace exists and is active ?

The reason i would like to know if the namespace is created is because i get an error message if i fire create pod before the namespace is actually created:

Error from server: error when creating "./pod.json": pods "my-pod" is forbidden: service account username/default was not found, retry after the service account is created

The below works fine if i give a sleep of 5 seconds between create namespace and create pod command

kubectl delete namespace testnamepsace;kubectl create namespace testnamepsace;sleep 5;kubectl create -f ./pod.json --namespace=testnamepsace

If i don't give the sleep of 5 seconds i see the error message mentioned above