This Conversations API method's required scopes depend on the type of channel-like object you're working with. To use the method, you'll need at least one of the channels:, groups:, im: or mpim: scopes corresponding to the conversation type you're working with.
This method is used to change the purpose of a conversation. The calling user must be a member of the conversation. Not all conversation types may have a purpose set.
Bots belonging to Slack apps are not supported
This method cannot be called with bot user tokens belonging to Slack apps, although legacy bot tokens will work. To use this method in a Slack app, use a user token imbued with the necessary scope. Stay tuned for updates as we bring a fuller feast of features to bots belonging to Slack apps.
Limits for workspace apps
Because workspace apps can't act on behalf of users, they don't have the power to set the purpose of conversations, except when they're already part of the conversation.
This method supports application/json via HTTP POST. Present your token in your request's Authorization header. Learn more.
Response
{
"ok": true,
"purpose": "I didn't set this purpose on purpose!"
}
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
channel_not_found
Value passed for channel was invalid.
not_in_channel
Authenticated user is not in the channel.
is_archived
Channel has been archived.
too_long
Purpose was longer than 250 characters.
user_is_restricted
This method cannot be called by a restricted user or single channel guest.
method_not_supported_for_channel_type
This type of conversation cannot be used with this method.
missing_scope
The token used is not granted the specific scope permissions required to complete this request.
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.
token_revoked
Authentication token is for a deleted user or workspace or the app has been removed.
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.
invalid_arguments
The method was called with invalid arguments.
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_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-8iso-8859-1.
invalid_form_data
The method was called via a POST request with Content-Typeapplication/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/jsonapplication/x-www-form-urlencodedmultipart/form-datatext/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.
request_timeout
The method was called via a POST request, but the POST data was either missing or truncated.
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.
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.
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.
