# Estimated Wait Time (POST)

Contains the error codes and error code messages related with Salesforce Scheduler API for the `estimated-wait-time` (POST) resource.

This table lists HTTP response code descriptions that are unique to this resource.

| HTTP Response Code | Error Code           | Description                                                                                                                                                    |
| ------------------ | -------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 400                | `JSON_PARSER_ERROR`  | The HTTP entity body is required, but this request has no entity body.                                                                                         |
| 405                | `METHOD_NOT_ALLOWED` | The request used an HTTP method other than `POST`.                                                                                                             |
| 500                | `INTERNAL_ERROR`     | Specify a valid Waitlist ID or Waitlist Participant ID and try again. Returned when both `waitlistId` and `waitlistParticipantId` are missing, empty, or null. |
| 500                | `INTERNAL_ERROR`     | The waitlist `<id>` doesn't have an active work type group. Returned when `waitlistId` is invalid.                                                             |
| 500                | `INTERNAL_ERROR`     | Invalid waitlist participant id. Only one waitlist should be associated with waitlist participant. Returned when `waitlistParticipantId` is invalid.           |