# Note on billing

| API Endpoint | Usage                                                                           | Billable |
| ------------ | ------------------------------------------------------------------------------- | -------- |
|              | Returns a list with all the available connectors from Tray's connector library. | No       |
|              | Returns a list with all the available operations for a given connector          | No       |
|              | Executes an operation of a connector and returns the result as the response.    | Yes      |