Argument	Type	Description
`token`Required	token	Authentication token bearing required scopes. Tokens should be passed as an HTTP Authorization header or alternatively, as a POST parameter. Example`xxxx-xxxxxxxxx-xxxx`
`external_unique_id`Required	string	An ID supplied by the 3rd-party Call provider. It must be unique across all Calls from that service. Example`025169F6-E37A-4E62-BB54-7F93A0FC4C1F`
`join_url`Required	string	The URL required for a client to join the Call. Example`https://example.com/calls/1234567890`
`created_by`	string	The valid Slack user ID of the user who created this Call. When this method is called with a user token, the `created_by` field is optional and defaults to the authed user of the token. Otherwise, the field is required. Example`U1H77`
`date_start`	integer	Call start time in UTC UNIX timestamp format Example`1562002086`
`desktop_app_join_url`	string	When supplied, available Slack clients will attempt to directly launch the 3rd-party Call with this URL. Example`callapp://join/1234567890`
`external_display_id`	string	An optional, human-readable ID supplied by the 3rd-party Call provider. If supplied, this ID will be displayed in the Call object. Example`705-292-868`
`title`	string	The name of the Call. Example`Kimpossible sync up`
`users`	array	The list of users to register as participants in the Call. Read more on how to specify users here. Example`[{"slack_id": "U1H77"}, {"external_id": "54321678", "display_name": "External User", "avatar_url": "https://example.com/users/avatar1234.jpg"}]`

This method supports application/json via HTTP POST. Present your token in your request's Authorization header. Learn more.

Example responses

This method is part of our Calls API.

For more information on how to specify users, read our additional documentation in the usage guide.

{
	"ok": true,
	"call": {
		"id": "R0E69JAIF",
		"date_start": 1562002086,
		"external_unique_id": "025169F6-E37A-4E62-BB54-7F93A0FC4C1F",
		"join_url": "https://example.com/calls/1234567890",
		"desktop_app_join_url": "callapp://join/1234567890",
		"external_display_id": "705-292-868",
		"title": "Kimpossible sync up",
		"users": [
			{
				"slack_id": "U0MQG83FD"
			},
			{
				"external_id": "54321678",
				"display_name": "Kim Possible",
				"avatar_url": "https://callmebeepme.com/users/avatar1234.jpg"
			}
		]
	}
}

Note that the success response includes an id associated with the Call. This ID can be used to post the Call to a channel by using the chat.postMessage method with the following block:

{
	"blocks": [
		{
			"type": "call",
			"call_id": "R0E69JAIF"
		}
	]
}

Errors

This table lists the expected errors that this method could return. However, other errors can be returned in the case where the service is down or other unexpected factors affect processing. Callers should always check the value of the ok params in the response.

Error	Description
`not_implemented`	This method is not available.
`internal_error`	The server could not complete your operation(s) without encountering an error, likely due to a transient issue on our end. It's possible some aspect of the operation succeeded before the error was raised.
`invalid_start_time`	The start time is invalid.
`not_authorized`	The specified user is not authorized to create a Call in this channel.
`user_not_found`	A specified user wasn't found.
`invalid_created_by`	The `created_by` user ID is invalid.
`not_authed`	No authentication token provided.
`invalid_auth`	Some aspect of authentication cannot be validated. Either the provided token is invalid or the request originates from an IP address disallowed from making the request.
`account_inactive`	Authentication token is for a deleted user or workspace when using a `bot` token.
`token_revoked`	Authentication token is for a deleted user or workspace or the app has been removed when using a `user` token.
`no_permission`	The workspace token used in this request does not have the permissions necessary to complete the request. Make sure your app is a member of the conversation it's attempting to post a message to.
`org_login_required`	The workspace is undergoing an enterprise migration and will not be available until migration is complete.
`ekm_access_denied`	Administrators have suspended the ability to post a message.
`missing_scope`	The token used is not granted the specific scope permissions required to complete this request.
`not_allowed_token_type`	The token type used in this request is not allowed.
`method_deprecated`	The method has been deprecated.
`deprecated_endpoint`	The endpoint has been deprecated.
`two_factor_setup_required`	Two factor setup is required.
`enterprise_is_restricted`	The method cannot be called from an Enterprise.
`invalid_arguments`	The method was either called with invalid arguments or some detail about the arguments passed are invalid, which is more likely when using complex arguments like blocks or attachments.
`invalid_arg_name`	The method was passed an argument whose name falls outside the bounds of accepted or expected values. This includes very long names and names with non-alphanumeric characters other than `_`. If you get this error, it is typically an indication that you have made a very malformed API call.
`invalid_array_arg`	The method was passed an array as an argument. Please only input valid strings.
`invalid_charset`	The method was called via a `POST` request, but the `charset` specified in the `Content-Type` header was invalid. Valid charset names are: `utf-8` `iso-8859-1`.
`invalid_form_data`	The method was called via a `POST` request with `Content-Type` `application/x-www-form-urlencoded` or `multipart/form-data`, but the form data was either missing or syntactically invalid.
`invalid_post_type`	The method was called via a `POST` request, but the specified `Content-Type` was invalid. Valid types are: `application/json` `application/x-www-form-urlencoded` `multipart/form-data` `text/plain`.
`missing_post_type`	The method was called via a `POST` request and included a data payload, but the request did not include a `Content-Type` header.
`team_added_to_org`	The workspace associated with your request is currently undergoing migration to an Enterprise Organization. Web API and other platform operations will be intermittently unavailable until the transition is complete.
`invalid_json` [hidden]	The method was called via a `POST` request with `Content-Type` `application/json`, but the body was not valid JSON.
`json_not_object` [hidden]	The method was called via a `POST` request a valid JSON body, but the JSON value was not an object.
`ratelimited`	The request has been ratelimited. Refer to the `Retry-After` header for when to retry the request.
`accesslimited`	Access to this method is limited on the current network
`request_timeout`	The method was called via a `POST` request, but the `POST` data was either missing or truncated.
`upgrade_required` [hidden]	The calling application needs to be upgraded.
`service_unavailable`	The service is temporarily unavailable
`fatal_error`	The server could not complete your operation(s) without encountering a catastrophic error. It's possible some aspect of the operation succeeded before the error was raised.

Warnings

This table lists the expected warnings that this method will return. However, other warnings can be returned in the case where the service is experiencing unexpected trouble.

Warning	Description
`missing_charset`	The method was called via a `POST` request, and recommended practice for the specified `Content-Type` is to include a `charset` parameter. However, no `charset` was present. Specifically, non-form-data content types (e.g. `text/plain`) are the ones for which `charset` is recommended.
`superfluous_charset`	The method was called via a `POST` request, and the specified `Content-Type` is not defined to understand the `charset` parameter. However, `charset` was in fact present. Specifically, form-data content types (e.g. `multipart/form-data`) are the ones for which `charset` is superfluous.

API response

URL

POST body

Submit your arguments to see the API response

Was this page helpful?