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Slack Connector

Updated
  • Updated on Mar 25, 2026
  • Published on Feb 19, 2026
  • 18 minute(s) read
  • SG
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Slack is a messaging platform. The Slack component allows posting messages to a Slack channel.

API Documentation

This component was built using the following API References:

Connections

OAuth 2.0

Authenticate requests to Slack using values obtained from the developer console.

The vast majority of actions in this component use OAuth 2.0 for authentication.

Prerequisites

Setup Steps

  1. Navigate to the Slack Developer App Portal
  2. Click Create New App
  3. Choose to create the app From scratch
  4. Give the app a name and select the workspace. It will be configured to be multi-workspace capable in a moment
  5. Select OAuth & Permissions from the sidebar
    1. Under Redirect URLs, add https://oauth2.flowbuilder.eu.lansweeper.com/callback for EU sites or https://oauth2.flowbuilder.us.lansweeper.com/callback for US sites.
    2. At the bottom, add some User Token Scopes if the integration will send messages on behalf of users, or Bot Token Scopes if a Slack "bot" will send the messages.
      The scopes required depend on what types of things the Slack integration will need to do (create channels, send messages, etc).
      For sending messages to a channel as a bot, add these scopes: chat:write chat:write.public. To send messages as a user, see the section below.
  6. Next, select Distribute App under Manage Distribution. Confirm that "removed hard coded information" is checked and select Activate Public Distribution.
    The app needs to be publicly distributed for installation in Slack workspaces.
  7. Finally, open Basic Information. Copy the Client ID, Client Secret and Signing Secret.

Configure the Connection

Add a Slack step to the integration - that will create a connection config variable.
Open the connection config variable.

  • Enter the Client ID, Signing Secret and Client Secret from the Slack app
  • For Scopes, enter the required scopes based on what Slack actions the integration includes:
    • For sending messages to a channel, enter the scopes chat:write chat:write.public to assign a bot token that can write messages to public channels. See below for information on sending messages to private channels.
    • Conversation and channel-related actions require admin.conversations:write.
    • Enter scopes with spaces in between them (e.g. chat:write users:read users:read.email)

A list of all Slack OAuth scopes and what each does are available in the Slack documentation.

Sending messages to private channels

The chat:write.public scope allows the bot to send messages to public channels.
To send messages to private channels, or to be more selective about what channels the bot can send messages to, the bot must be invited to specific channels.

If a bot does not have chat:write.public or tries to write to a private channel it's not a part of, a not_in_channel error will be received from Slack when attempting to send a message to that channel.

Sending messages as a user

Slack applications typically send messages as bot users.
To instead send messages as a user, edit the Auth URL and add chat:write to a user_scope query parameter on the Authorization URL to get a User token. To manage channels, add the channels:write scope.

The Auth URL, then, will look something like this: https://slack.com/oauth/v2/authorize?user_scope=chat:write

Dynamically changing the bot's name

The bot's username and icon are set when creating the Slack app.
To override the bot's username within the integration, request the chat:write.customize scope in addition to chat:write.

GovSlack

Slack offers GovSlack for government organizations that require compliance with FIPS 140-2, FedRAMP, ITAR, etc.
To use the Slack component with GovSlack, change the beginning of OAuth auth URL, token URL, and revoke URL from https://slack.com to https://slack-gov.com.
The component will automatically point API requests towards the Slack Gov API endpoint.

This connection uses OAuth 2.0, a common authentication mechanism for integrations.
Read about how OAuth 2.0 works here.

Input Comments Default
Authorize URL The OAuth 2.0 Authorization URL for Slack. If you want to request access to the API on behalf of a User, append a 'user_scope' query parameter to the end of the Authorize URL: https://slack.com/oauth/v2/authorize?user_scope=chat:write,channels:read,groups:read,im:read,mpim:read https://slack.com/oauth/v2/authorize
Token URL The OAuth 2.0 Token URL for Slack https://slack.com/api/oauth.v2.access
Revoke URL The OAuth 2.0 Revocation URL for Slack https://slack.com/api/auth.revoke
Scopes (Bot) A space-delimited set of one or more scopes to get the Bot token. If you want to access the API as a User, you must append a 'user_scope' query parameter to the end of the Authorize URL and set the 'Is User' flag to true. chat:write chat:write.public chat:write.customize channels:read groups:read im:read mpim:read
Client ID
Client Secret
Signing Secret
Is User Flip the flag to true if you want to access the API as a User. If flipped you must also provide a 'user_scope' query parameter to the end of the Authorize URL. Leaving the flag false will grant you a Bot token instead. false

Webhook URL

Authenticate requests to Slack using a Webhook URL.

The Slack Message from Webhook and the Slack Block Message from Webhook actions are the only Slack actions that do not authenticate with OAuth.
Instead, these actions use Slack Incoming Webhooks.

Prerequisites

  • A Slack workspace with administrator access
  • Ability to create Slack apps in the workspace

Setup Steps

To generate a Slack incoming webhook URL:

  1. Navigate to the Slack App Portal
  2. Click Create New App, adding an app to the workspace
  3. Under Add features and functionality select Incoming Webhooks
  4. Activate Incoming Webhooks and then Add New Webhook to Workspace
  5. Select the channel where messages will be posted
  6. Copy the Webhook URL. It should be of the form https://hooks.slack.com/services/foo/bar/baz

Configure the Connection

  • Enter the Webhook URL into the connection configuration
Input Comments Default
Webhook URL The Slack webhook URL. Instructions for generating a Slack webhook are available on the Slack component docs page.

Triggers

App Webhook

Trigger for handling slash command and modal webhooks from Slack

Input Comments Default
Response Body The response body to return to Slack. Leave empty for no response body.
Content Type The content type of the response returned to Slack. text/plain

Events API Webhook

Receive and validate webhook requests from Slack's Events API for webhooks you configure.

Input Comments Default
Connection The Slack connection to use.

Actions

Archive Conversation

Archive an existing conversation

Input Comments Default
Channel Name or ID The name or static ID of the Slack channel.
Connection The Slack connection to use.

Close Conversation

Close an existing conversation

Input Comments Default
Conversation Name The name of the Slack conversation.
Connection The Slack connection to use.

Conversation Exists

Returns true if the conversation already exists

Input Comments Default
Channel Name or ID The name or static ID of the Slack channel.
Connection The Slack connection to use.

Create Conversation

Create a new conversation

Input Comments Default
Conversation Name The name of the Slack conversation.
Is Private When true, the Slack conversation will be private. false
Team ID The ID of the Slack team.
Connection The Slack connection to use.

Delete Message

Delete the content and metadata of an existing message

Input Comments Default
Message ID A unique identifier of a message or thread to reply to (thread_ts)
Channel ID The static ID of the Slack channel.
Connection The Slack connection to use.

Delete Pending Scheduled Message

Delete the content and metadata of a pending scheduled message from a queue

Input Comments Default
Message ID A unique identifier of a message or thread to reply to (thread_ts)
Channel ID The static ID of the Slack channel.
Connection The Slack connection to use.

Get Conversation History

Get the history of a conversation

Input Comments Default
Channel Name or ID The name or static ID of the Slack channel.
Fetch All When true, fetches all pages of results. false
Limit The maximum number of results to return.
Cursor The pagination cursor from a previous request.
Include All Metadata When true, includes all metadata in results. false
Inclusive Include messages with oldest or latest timestamps in results. Ignored unless either timestamp is specified false
Latest Only messages before this Unix timestamp will be included in results. Default is current time.
Oldest Only messages after this Unix timestamp will be included in results
Connection The Slack connection to use.

Get User By Email

Get a user's information by email

Input Comments Default
Email Provide a string value for the email address of the user.
Connection The Slack connection to use.

Get User By ID

Get a user's information by ID

Input Comments Default
User ID Provide a string value for the unique identifier of the user you want to send the message to.
Connection The Slack connection to use.

Invite User To Conversation

Invite a user to an existing conversation

Input Comments Default
Channel Name or ID The name or static ID of the Slack channel.
User ID Provide a string value for the unique identifier of the user you want to send the message to.
Connection The Slack connection to use.

Leave Conversation

Leave an existing conversation

Input Comments Default
Channel Name or ID The name or static ID of the Slack channel.
Connection The Slack connection to use.

List Conversation Members

List all members of a conversation

Input Comments Default
Channel Name or ID The name or static ID of the Slack channel.
Fetch All When true, fetches all pages of results. false
Limit The maximum number of results to return.
Cursor The pagination cursor from a previous request.
Connection The Slack connection to use.

List Conversations

List all conversations

Input Comments Default
Team ID The ID of the Slack team.
Limit The maximum number of results to return.
Cursor The pagination cursor from a previous request.
Fetch All When true, fetches all pages of results. false
Exclude Archived When true, archived results will be excluded from the result set. false
Connection The Slack connection to use.
Include public channels? When true, includes public channels in results. true
Include private channels? When true, includes private channels in results. false
Include multi-party IM (mpim) channels? When true, includes multi-party IM channels in results. false
Include IM channels? When true, includes IM channels in results. false

List Files

List all available files

Input Comments Default
Connection The Slack connection to use.
Fetch All When true, fetches all pages of results. false
Cursor The pagination cursor from a previous request.

List Scheduled Messages

List all scheduled messages

Input Comments Default
Connection The Slack connection to use.

List Users

List all users in the workspace.

Input Comments Default
Fetch All When true, fetches all pages of results. false
Limit The maximum number of results to return.
Cursor The pagination cursor from a previous request.
Team ID The ID of the Slack team.
Connection The Slack connection to use.

List Users Conversations

List all conversations for a user.

Input Comments Default
User ID Provide a string value for the unique identifier of the user you want to send the message to.
Fetch All When true, fetches all pages of results. false
Limit The maximum number of results to return.
Cursor The pagination cursor from a previous request.
Team ID The ID of the Slack team.
Connection The Slack connection to use.

Open View

Open a view for a user.

Input Comments Default
View A view payload (https://api.slack.com/reference/surfaces/views). This must be a JSON-encoded string. {
"type": "modal",
"title": {
"type": "plaintext",
"text": "Modal title"
},
"blocks": [
{
"type": "section",
"text": {
"type": "mrkdwn",
"text": "It's Block Kit...but _in a modal"
},
"block_id": "section1",
"accessory": {
"type": "button",
"text": {
"type": "plain_text",
"text": "Click me"
},
"action_id": "button_abc",
"value": "Button value",
"style": "danger"
}
},
{
"type": "input",
"label": {
"type": "plain_text",
"text": "Input label"
},
"element": {
"type": "plain_text_input",
"action_id": "input1",
"placeholder": {
"type": "plain_text",
"text": "Type in here"
},
"multiline": false
},
"optional": false
}
],
"close": {
"type": "plain_text",
"text": "Cancel"
},
"submit": {
"type": "plain_text",
"text": "Save"
},
"private_metadata": "Shhhhhhhh",
"callback_id": "view_identifier_12"
}
Trigger ID Exchange a trigger to post to the user.
Connection The Slack connection to use.

Post Block Message

Post a message to a slack channel

Input Comments Default
Blocks A JSON array containing blocks (objects) that make up the desired message. Use Slack's Block Kit Builder (https://app.slack.com/block-kit-builder/) to build block messages. {
"blocks": [
{
"type": "section",
"text": {
"type": "plain_text",
"text": "Hello world"
}
}
]
}
Alt Message This message will override if your block cannot be sent
Channel Name or ID The name or static ID of the Slack channel.
Bot Username The username of the bot the message will be sent from. This requires the 'chat:write.customize' scope.
Connection The Slack connection to use.
Message ID A unique identifier of a message or thread to reply to (thread_ts)

Post Ephemeral Message

Post an ephemeral message to a user or channel

Input Comments Default
Channel Name or ID The name or static ID of the Slack channel.
User ID Provide a string value for the unique identifier of the user you want to send the message to.
Bot Username The username of the bot the message will be sent from. This requires the 'chat:write.customize' scope.
Message The message to send the Slack channel.
Connection The Slack connection to use.

Post Message

Post a message to a slack channel

Input Comments Default
Message The message to send the Slack channel.
Channel Name or ID The name or static ID of the Slack channel.
Bot Username The username of the bot the message will be sent from. This requires the 'chat:write.customize' scope.
Connection The Slack connection to use.
Message ID A unique identifier of a message or thread to reply to (thread_ts)

Publish View

Publish a static view for a User.

Input Comments Default
View A view payload (https://api.slack.com/reference/surfaces/views). This must be a JSON-encoded string. {
"type": "modal",
"title": {
"type": "plaintext",
"text": "Modal title"
},
"blocks": [
{
"type": "section",
"text": {
"type": "mrkdwn",
"text": "It's Block Kit...but _in a modal"
},
"block_id": "section1",
"accessory": {
"type": "button",
"text": {
"type": "plain_text",
"text": "Click me"
},
"action_id": "button_abc",
"value": "Button value",
"style": "danger"
}
},
{
"type": "input",
"label": {
"type": "plain_text",
"text": "Input label"
},
"element": {
"type": "plain_text_input",
"action_id": "input1",
"placeholder": {
"type": "plain_text",
"text": "Type in here"
},
"multiline": false
},
"optional": false
}
],
"close": {
"type": "plain_text",
"text": "Cancel"
},
"submit": {
"type": "plain_text",
"text": "Save"
},
"private_metadata": "Shhhhhhhh",
"callback_id": "view_identifier_12"
}
User ID Provide a string value for the unique identifier of the user you want to send the message to.
Connection The Slack connection to use.

Push View

Push a view onto the stack of a root view.

Input Comments Default
View A view payload (https://api.slack.com/reference/surfaces/views). This must be a JSON-encoded string. {
"type": "modal",
"title": {
"type": "plaintext",
"text": "Modal title"
},
"blocks": [
{
"type": "section",
"text": {
"type": "mrkdwn",
"text": "It's Block Kit...but _in a modal"
},
"block_id": "section1",
"accessory": {
"type": "button",
"text": {
"type": "plain_text",
"text": "Click me"
},
"action_id": "button_abc",
"value": "Button value",
"style": "danger"
}
},
{
"type": "input",
"label": {
"type": "plain_text",
"text": "Input label"
},
"element": {
"type": "plain_text_input",
"action_id": "input1",
"placeholder": {
"type": "plain_text",
"text": "Type in here"
},
"multiline": false
},
"optional": false
}
],
"close": {
"type": "plain_text",
"text": "Cancel"
},
"submit": {
"type": "plain_text",
"text": "Save"
},
"private_metadata": "Shhhhhhhh",
"callback_id": "view_identifier_12"
}
Trigger ID Exchange a trigger to post to the user.
Connection The Slack connection to use.

Raw Request

Send raw HTTP request to Slack

Input Comments Default
Connection The Slack connection to use.
URL Input the path only (/team.info), The base URL is already included (https://slack.com/api). For example, to connect to https://slack.com/api/team.info, only /team.info is entered in this field.
Method The HTTP method to use.
Data The HTTP body payload to send to the URL.
Form Data The Form Data to be sent as a multipart form upload.
File Data File Data to be sent as a multipart form upload.
File Data File Names File names to apply to the file data inputs. Keys must match the file data keys above.
Query Parameter A list of query parameters to send with the request. This is the portion at the end of the URL similar to ?key1=value1&key2=value2.
Header A list of headers to send with the request.
Response Type The type of data you expect in the response. You can request json, text, or binary data. json
Timeout The maximum time that a client will await a response to its request
Retry Delay (ms) The delay in milliseconds between retries. This is used when 'Use Exponential Backoff' is disabled. 0
Retry On All Errors If true, retries on all erroneous responses regardless of type. This is helpful when retrying after HTTP 429 or other 3xx or 4xx errors. Otherwise, only retries on HTTP 5xx and network errors. false
Max Retry Count The maximum number of retries to attempt. Specify 0 for no retries. 0
Use Exponential Backoff Specifies whether to use a pre-defined exponential backoff strategy for retries. When enabled, 'Retry Delay (ms)' is ignored. false

Rename Conversation

Rename an existing conversation

Input Comments Default
Conversation Name The name of the Slack conversation.
New Conversation Name The name of the Slack conversation.
Connection The Slack connection to use.

Search All

Searches for messages and files matching a query.

Input Comments Default
Query Search query. May contain booleans, etc.
Count Number of items to return per page.
Sort The method to sort the results. For example, member_count will sort by the number of members in the channel. score
Sort Direction The direction to sort the results. For example, desc will sort the results in descending order. desc
Page Page number of results to return. 1
Highlight Pass a value of true to enable query highlight markers. false
Team ID Encoded team ID to search in, required if org token is used
Connection The Slack connection to use.

Search Files

Searches for files matching a query.

Input Comments Default
Query Search query. May contain booleans, etc.
Count Number of items to return per page.
Highlight Pass a value of true to enable query highlight markers. false
Page Page number of results to return. 1
Sort The method to sort the results. For example, member_count will sort by the number of members in the channel. score
Sort Direction The direction to sort the results. For example, desc will sort the results in descending order. desc
Team ID Encoded team ID to search in, required if org token is used
Connection The Slack connection to use.

Search Messages

Searches for messages matching a query.

Input Comments Default
Query Search query. May contain booleans, etc.
Count Number of items to return per page.
Highlight Pass a value of true to enable query highlight markers. false
Page Page number of results to return. 1
Sort The method to sort the results. For example, member_count will sort by the number of members in the channel. score
Sort Direction The direction to sort the results. For example, desc will sort the results in descending order. desc
Team ID Encoded team ID to search in, required if org token is used
Connection The Slack connection to use.

Set Conversation Purpose

Set the purpose of an existing conversation

Input Comments Default
Channel Name or ID The name or static ID of the Slack channel.
Connection The Slack connection to use.
Conversation Purpose Provide a string value for the purpose of the given conversation.

Set Conversation Topic

Set the topic of an existing conversation

Input Comments Default
Connection The Slack connection to use.
Channel Name or ID The name or static ID of the Slack channel.
User ID Provide a string value for the unique identifier of the user you want to send the message to.
Conversation Topic Provide a string value for the topic of the given conversation.

Slack Block Message From Webhook

Post a block formatted message to a Slack channel from a webhook URL

Input Comments Default
Connection The Slack connection to use.
Alt Message This message will override if your block cannot be sent
Blocks A JSON array containing blocks (objects) that make up the desired message. Use Slack's Block Kit Builder (https://app.slack.com/block-kit-builder/) to build block messages. {
"blocks": [
{
"type": "section",
"text": {
"type": "plain_text",
"text": "Hello world"
}
}
]
}

Slack Message From Webhook

Post a message to a Slack channel from a webhook URL

Input Comments Default
Connection The Slack connection to use.
Message The message to send the Slack channel.

Update Message

Update the contents of an existing message

Input Comments Default
Message The message to send the Slack channel.
Message ID A unique identifier of a message or thread to reply to (thread_ts)
Channel ID The static ID of the Slack channel.
Connection The Slack connection to use.

Update View

Update an existing view.

Input Comments Default
View A view payload (https://api.slack.com/reference/surfaces/views). This must be a JSON-encoded string. {
"type": "modal",
"title": {
"type": "plaintext",
"text": "Modal title"
},
"blocks": [
{
"type": "section",
"text": {
"type": "mrkdwn",
"text": "It's Block Kit...but _in a modal"
},
"block_id": "section1",
"accessory": {
"type": "button",
"text": {
"type": "plain_text",
"text": "Click me"
},
"action_id": "button_abc",
"value": "Button value",
"style": "danger"
}
},
{
"type": "input",
"label": {
"type": "plain_text",
"text": "Input label"
},
"element": {
"type": "plain_text_input",
"action_id": "input1",
"placeholder": {
"type": "plain_text",
"text": "Type in here"
},
"multiline": false
},
"optional": false
}
],
"close": {
"type": "plain_text",
"text": "Cancel"
},
"submit": {
"type": "plain_text",
"text": "Save"
},
"private_metadata": "Shhhhhhhh",
"callback_id": "view_identifier_12"
}
View ID A unique identifier of the view to be updated. Either view_id or external_id is required.
External ID A unique identifier of the view to be updated. Either view_id or external_id is required.
Connection The Slack connection to use.

Upload File

Upload a new file to a slack conversation

Input Comments Default
Connection The Slack connection to use.
File Content Provide the data for a file to be uploaded
File Name Provide a name for the file.
File Title The title of the file as it will appear in the channel
Channels Provide a comma separated list of channel IDs that the file will be shared in.
Initial Comment The message text introducing the file in the specified channels when uploaded
Thread Reply Provide another message's ts value to upload this file as a reply. Never use a reply's ts value, use the parent instead.
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