### GraphQL Mutation: createWebhook

| Parameter          | Type            | Required |
|--------------------|-----------------|----------|
| subscription_type   | SubscriptionType! | true     |
| url                | String!        | true     |
| header_key         | String         | false    |
| header_value       | String         | false    |

```graphql
mutation createWebhook(
    $subscription_type: SubscriptionType!,
    $url: String!,
    $header_key: String,
    $header_value: String
) {
    createWebhook(
        subscription_type: $subscription_type,
        url: $url,
        header_key: $header_key,
        header_value: $header_value
    ) {
        id
        subscription_type
        url
        header_key
        header_value
    }
}
```

```graphql
enum SubscriptionType {
  entity
  transfer
  incoming_transfer
  wallet
}
```

var axios = require('axios');

var data = JSON.stringify({
  query: `mutation createWebhookSubscription (

$subscription_type: SubscriptionType!,

$url: String!,

$header_key: String,

$header_value: String

) {

createWebhookSubscription (

subscription_type: $subscription_type,

url: $url,

header_key: $header_key,

header_value: $header_value

)

}`,  
    variables: {"subscription_type":"transfer","url":"https://myurl.com","header_key":"my-key","header_value":"key-value"}
});

var config = {
  method: 'post',
  url: 'https://sandbox.external.routefusion.com/graphql',
  headers: {
    'Authorization': 'Bearer <your token>',
    'Content-Type': 'application/json'
  },
  data : data
};

axios(config)
.then(function (response) {
  console.log(JSON.stringify(response.data));
})
.catch(function (error) {
  console.log(error);
});

{
  "data": {
    "createWebhookSubscription": "18ea46e5-2c36-4862-9eac-adc44364df7b"
  }
}