### OAuth 2.0 Implementation

Most modern programming languages and frameworks have native libraries for implementing an OAuth 2.0 API service.

### Authorization Credentials

Authorization credentials can be created and downloaded from the Payer Portal. The credentials consist of a Client ID and Secret.

#### Parameters

| Parameter    | Type   | Description                 |
|--------------|--------|-----------------------------|
| grant_type   | string | Defaults to client_credentials |

#### Example Request

```shell
curl -X POST -u "clientId:secret" \
-d "grant_type=client_credentials" \
--url https://test.api.interchecks.io/oauth2/token
```

#### Responses

| Status Code | Description                            |
|-------------|----------------------------------------|
| 200         | Result                                 |
| 400         | Invalid Client ID or Secret            |