Slack API Documentation

This is the complete API documentation for connecting to the Slack API using MindCloud's Universal API. If you are new to MindCloud, start with the Introduction to see how one API can sit in front of many different apps.

MindCloud is an integration company that offers one normalized API to access 3,100+ apps from a single place. It cleans up provider-specific quirks, keeps requests and responses consistent, and centralizes authentication so you do not need to manage separate flows for every app. Browse other apps.

Meet Slack: Chat in channels, share knowledge, automate workflows, and join huddles. Keep reading to get started.

Quickstart

Before you run your first Slack request, you need three things:

1. A MindCloud account — sign in or create an account at MindCloud.
2. A MindCloud API Key — create one in API Keys. Keep it on your server.
3. At least one Slack connection — create or choose one in Connections. Note its connectionId.

Every Slack action uses the same URL pattern:

https://connect.mindcloud.co/v1/universal/slack/latest/actions/{actionSlug}

You need a MindCloud API Key and a Slack connection. Then call an action such as Get Channel Information:

curl --request GET \
  --url "https://connect.mindcloud.co/v1/universal/slack/latest/actions/get-channel-information" \
  --header "Authorization: Bearer $MINDCLOUD_API_KEY" \
  --get \
  --data-urlencode "connectionId=$CONNECTION_ID"

Every response comes back in the same envelope, with your rows in a data array:

{
  "success": true,
  "data": [
    { "id": "1042", "name": "Ava" }
  ],
  "meta": {}
}

After your first request works, use Shape your requests to control arguments, pagination, filtering, fields, and errors.

Authentication

Authentication has two layers. Your MindCloud API Key authenticates the request to MindCloud, sent as a Bearer token in the Authorization header. The connectionId selects the connected Slack account that should run the action. MindCloud stores and refreshes the Slack credentials behind that connection, so you never send provider tokens with your requests.

Pass connectionId in the query string for GET and DELETE actions, and in the JSON body for POST, PUT, and PATCH actions. Keep your MindCloud API Key on your server; do not ship it in browser code, mobile apps, public repositories, or logs.

Slack actions

All 31 published actions for this Slack version. Each page documents the endpoint, arguments, and response controls.

• POSTAdd Reaction
• POSTCreate Channel
• DELETEDelete File
• DELETEDelete Message
• DELETEDelete Scheduled Message
• GETGet Channel Information
• GETGet File Information
• GETGet User Information
• POSTInvite User to Channel
• PUTJoin Channel
• DELETEKick User From Channel
• DELETELeave Channel
• GETList Channel Members
• GETList Channel Messages
• GETList Channels
• GETList Files
• GETList Message Reactions
• GETList Message Replies
• GETList Scheduled Messages
• GETList User Reactions
• GETList Users
• POSTOpen Conversation
• DELETERemove Reaction
• POSTSchedule Message
• GETSearch Channels and Users
• GETSearch User By Email
• POSTSend Channel Message
• POSTSend User Message
• PUTSet Channel Topic
• PUTSet Presence
• PUTUpdate Message

Related apps

More Communication apps on the Universal API, behind the same REST shape. Or browse all apps.

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