Starts a Real Time Messaging session.

Optional Params

• batch_presence_aware - Batch presence deliveries via subscription. Enabling changes the shape of presence_change events. See batch presence. ex: 1
• presence_sub - Only deliver presence events when requested by subscription. See presence subscriptions.

Errors the API can return:

• access_denied - Access to a resource specified in the request is denied.
• accesslimited - Access to this method is limited on the current network
• account_inactive - Authentication token is for a deleted user or workspace when using a bot token.
• deprecated_endpoint - The endpoint has been deprecated.
• ekm_access_denied - Administrators have suspended the ability to post a message.
• enterprise_is_restricted - The method cannot be called from an Enterprise.
• 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.
• 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_arguments - The method was called with invalid arguments.
• invalid_array_arg - The method was passed an array as an argument. Please only input valid strings.
• 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.
• 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.
• method_deprecated - The method has been deprecated.
• migration_in_progress - Team is being migrated between servers. See the team_migration_started event documentation for details.
• 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.
• missing_scope - The token used is not granted the specific scope permissions required to complete this request.
• 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.
• not_allowed_token_type - The token type used in this request is not allowed.
• not_authed - No authentication token provided.
• org_login_required - The workspace is undergoing an enterprise migration and will not be available until migration is complete.
• ratelimited - The request has been ratelimited. Refer to the Retry-After header for when to retry the request.
• request_timeout - The method was called via a POST request, but the POST data was either missing or truncated.
• service_unavailable - The service is temporarily unavailable
• team_access_not_granted - The token used is not granted the specific workspace access required to complete this request.
• 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.
• token_expired - Authentication token has expired
• token_revoked - Authentication token is for a deleted user or workspace or the app has been removed when using a user token.
• two_factor_setup_required - Two factor setup is required.

Deprecated: Starts a Real Time Messaging session. Use rtm.connect instead.

Optional Params

• batch_presence_aware - Batch presence deliveries via subscription. Enabling changes the shape of presence_change events. See batch presence. ex: 1
• include_locale - Set this to true to receive the locale for users and channels. Defaults to false
• mpim_aware - Returns MPIMs to the client in the API response.
• no_latest - Exclude latest timestamps for channels, groups, mpims, and ims. Automatically sets no_unreads to 1 ex: 1
• no_unreads - Skip unread counts for each channel (improves performance).
• presence_sub - Only deliver presence events when requested by subscription. See presence subscriptions.
• simple_latest - Return timestamp only for latest message object of each channel (improves performance).

Errors the API can return:

• access_denied - Access to a resource specified in the request is denied.
• accesslimited - Access to this method is limited on the current network
• account_inactive - Authentication token is for a deleted user or workspace when using a bot token.
• deprecated_endpoint - The endpoint has been deprecated.
• ekm_access_denied - Administrators have suspended the ability to post a message.
• enterprise_is_restricted - The method cannot be called from an Enterprise.
• 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.
• 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_arguments - The method was called with invalid arguments.
• invalid_array_arg - The method was passed an array as an argument. Please only input valid strings.
• 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.
• 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.
• method_deprecated - rtm.start is deprecated. Please use rtm.connect instead of rtm.start. Read https://docs.slack.dev/changelog/2021-10-rtm-start-to-stop for more info.
• migration_in_progress - Workspace is being migrated between servers. See the team_migration_started event documentation for details.
• 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.
• missing_scope - The token used is not granted the specific scope permissions required to complete this request.
• 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.
• not_allowed_token_type - The token type used in this request is not allowed.
• not_authed - No authentication token provided.
• org_login_required - The workspace is undergoing an enterprise migration and will not be available until migration is complete.
• ratelimited - The request has been ratelimited. Refer to the Retry-After header for when to retry the request.
• request_timeout - The method was called via a POST request, but the POST data was either missing or truncated.
• rtm_connect_required - rtm.start is deprecated. Please use rtm.connect instead of rtm.start. Read https://docs.slack.dev/changelog/2021-10-rtm-start-to-stop for more info.
• service_unavailable - The service is temporarily unavailable
• team_access_not_granted - The token used is not granted the specific workspace access required to complete this request.
• 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.
• token_expired - Authentication token has expired
• token_revoked - Authentication token is for a deleted user or workspace or the app has been removed when using a user token.
• two_factor_setup_required - Two factor setup is required.