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Enable workspaces to conversationally interact with external services or your custom code by building bot users. Bot users have many of the same qualities as their human counterparts: The biggest difference between bot users and regular users is that instead of interacting with a workspace via one of Slack's mobile or desktop apps, bot users are controlled programmatically through Slack's APIs.
They don't "log in" with a password either -- they rely on a bot user token instead, which gives them access to a subset of the API methods available to regular users. Slack has two different kinds of bot users: We recommend sticking with app bots. They differ slightly in functionality but app bots are easier to install, distribute, and combine with other features of Slack's platform like interactive messages and slash commands.
They are, in other words, the way forward. Custom bots are a legacy of the early days of Slack's API. The Events API is the primary way to receive and respond to events as a bot user.
This is not ideal for bot users that will be installed in multiple workspaces as a websocket connection must be maintained for each instance. This websocket will send you all of the messages and activity that happen in public and private channels the bot user is invited to, as well as messages sent to it via direct message.
In addition to receiving messages and activity in the channels it belongs to, the RTM API can be used to post messages as well. It doesn't support attachments or other message formatting modes. To post more complex messages as a bot user, clients can use the Web API method chat. The bot user can also use the Web API to add emoji reactions to messages, upload files , pin and star messages, and generally behave like any other user on the workspace.
Bots can also work within threaded messages and add replies to conversations. Bot users can attach buttons and menus to messages. These trigger actions on your servers, allowing your bot to perform distinct tasks and incrementally alter messages.
After you've figured out what you want your bot user to do and have an idea of how you'll go about implementing it, you'll want to prepare Slack for the arrival of your bot user. Whether you only want to use it in your own workspace or have bold plans to distribute your bot user to other Slack workspaces, you should attach it to a Slack app.
This makes it much easier for workspaces to install via the Slack Button , lets you control the bot user's icon and name even after it has been installed, and allows you to bundle it with other app functionality, from incoming webhooks to Events API. To get started, create a Slack app and add a bot in the management dashboard. Bot users in Slack apps have some special considerations when using the API. If you are the developer of an app or service that wants to provide bot-based functionality to Slack workspaces -- or you just are working on something cool you want to share with everyone -- you can implement the Slack button to make it simple for any workspace to install your app.
Or submit to Slack App Directory for the whole world to see. Creating bot users probably means you'll be coding. If you're using an existing library such as node-slack-client then your bot access token should be all you need to get started. After building those basics, you can focus on the interesting functionality of your bot user.
One easy way to build bot users, especially if you already work with Node. Botkit is a framework that takes care of most these API gymnastics, so you can focus on your bot's behavior. Unlike regular users, the actions they can perform are somewhat limited.
For workspaces on the Free plan, each bot user counts as a separate integration. In most cases you want a bot user to display as "active" and ready to respond, even if it hasn't posted a message in a while.
There's more to learn about making your bot present in our bot user presence documentation. When a workspace installs your application and adds your bot user, the bot user token is imbued with the necessary scopes to use API methods on the bot's behalf.
You may have other OAuth tokens associated with your app or specific users who have authorized it. Those tokens have a time and place, but when you want to use the Web or RTM API as the bot user, you must use the bot access token that has been awarded the bot scope. Bot user tokens begin with the characters xoxb. Bot tokens are issued for each workspace as part of the OAuth approval process. Once the team uses the Slack button to install your bot user and as you exchange the code for an access token, you'll receive an additional component to the typical access token response:.
The bot node of that JSON response contains two fields. Secure your bot user tokens , as with all tokens and credentials. Do not share tokens with users or anyone else.
Bot user tokens have particularly expansive capabilities not afforded to typical user tokens issued on behalf of members. As mentioned above, when you connect to the Real Time Messaging API or other APIs in the agency of your bot user, you'll need to use your bot user's OAuth token, awarded to you when somebody in your workspace authorizes your application.
Bot users can also only call a subset of our API methods. If your Slack app needs access to additional methods in the Web API, you'll need to request your required scopes separately as part of the authentication flow. Additionally requested scopes are applied to your application tokens but will not be applied to your bot user tokens. Authentication Using OAuth 2.
Bot Users Enable workspaces to conversationally interact with external services or your custom code by building bot users. What are bot users? Within a Slack channel, bot users can do nearly anything you can program them to do. What can bot users do? Monitor and process channel activity This websocket will send you all of the messages and activity that happen in public and private channels the bot user is invited to, as well as messages sent to it via direct message.
Post messages and react to users In addition to receiving messages and activity in the channels it belongs to, the RTM API can be used to post messages as well. Make messages interactive with buttons Bot users can attach buttons and menus to messages. Setting up your bot user After you've figured out what you want your bot user to do and have an idea of how you'll go about implementing it, you'll want to prepare Slack for the arrival of your bot user. Adding a bot user to a Slack app Whether you only want to use it in your own workspace or have bold plans to distribute your bot user to other Slack workspaces, you should attach it to a Slack app.
How do I distribute my bot user to other workspaces? Programming bot users Creating bot users probably means you'll be coding. Botkit One easy way to build bot users, especially if you already work with Node. Other differences between bot users and normal users pricing - Like other APIs and integrations, bot users are free.
Tokens and scopes When a workspace installs your application and adds your bot user, the bot user token is imbued with the necessary scopes to use API methods on the bot's behalf.
Retrieving your bot user token Bot tokens are issued for each workspace as part of the OAuth approval process. Once the team uses the Slack button to install your bot user and as you exchange the code for an access token, you'll receive an additional component to the typical access token response: Bot methods The full list of methods that can be used by bot users: Fetches history of messages and events from direct message channel.
Retrieve a thread of messages posted to a direct message conversation. Fetches history of messages and events from a multiparty direct message. Related Articles Voice and tone: Opens or resumes a direct message or multi-person direct message. Exchanges a temporary OAuth verifier code for a workspace token.