Microsoft 365 Outlook API Documentation

This is the complete API documentation for connecting to the Microsoft 365 Outlook 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 Microsoft 365 Outlook: Access Microsoft 365 Outlook mail through Microsoft Graph, including messages, folders, attachments, replies, forwarding, and sending mail for the signed-in user. Keep reading to get started.

Quickstart

Before you run your first Microsoft 365 Outlook 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 Microsoft 365 Outlook connection — create or choose one in Connections. Note its connectionId.

Every Microsoft 365 Outlook action uses the same URL pattern:

POST https://connect.mindcloud.co/v2/universal/apps/microsoft365Outlook/actions/{actionSlug}/run

You need a MindCloud API Key and a Microsoft 365 Outlook connection. Then call an action such as List Inbox Messages:

curl --request POST \
  --url "https://connect.mindcloud.co/v2/universal/apps/microsoft365Outlook/actions/list-inbox-messages/run" \
  --header "Authorization: Bearer $MINDCLOUD_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
  "connectionId": "$CONNECTION_ID",
  "arguments": {}
}'

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.

Authenticate with a MindCloud API Key plus a connectionId for your Microsoft 365 Outlook account. See Microsoft 365 Outlook API Authentication for the full flow and how to get your connection credentials.

Microsoft 365 Outlook actions

All 17 published actions for this Microsoft 365 Outlook version. Each page documents the endpoint, arguments, and response controls.

• POSTAdd File Attachment to Message
• POSTCreate Draft Message
• DELETEDelete Message
• POSTForward Message
• GETGet Message
• GETGet Message Attachment
• GETList Child Mail Folders
• GETList Inbox Messages
• GETList Mail Folders
• GETList Message Attachments
• GETList Messages in Folder
• PUTMove Message
• POSTReply All to Message
• POSTReply to Message
• PUTSend Draft Message
• POSTSend Mail
• PUTUpdate Draft Message

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