I am trying to send a message to a chat using the graph api but i get 401 unauthorized

Question

I have been trying to send a message on msteams using the graph api I am using this curl but I am getting 401- Unauthorized
curl 'https://graph.microsoft.com/v1.0/chats/XXX/messages' \

-H 'Accept: /' \

-H 'Accept-Language: en-GB,en-US;q=0.9,en;q=0.8' \

-H 'Authorization: Bearer token' \

-H 'Connection: keep-alive' \

-H 'Content-Type: application/json' \

-H 'Origin: https://developer.microsoft.com' \

-H 'Referer: https://developer.microsoft.com/' \

-H 'SdkVersion: GraphExplorer/4.0, graph-js/3.0.7 (featureUsage=6)' \

-H 'Sec-Fetch-Dest: empty' \

-H 'Sec-Fetch-Mode: cors' \

-H 'Sec-Fetch-Site: same-site' \

-H 'User-Agent: XXX \

-H 'cache-control: no-cache' \

-H 'client-request-id: XXX' \

-H 'pragma: no-cache' \

-H 'prefer: ms-graph-dev-mode' \

-H 'sec-ch-ua: "Google Chrome";v="137", "Chromium";v="137", "Not/A)Brand";v="24"' \

-H 'sec-ch-ua-mobile: ?0' \

-H 'sec-ch-ua-platform: "Windows"' \

--data-raw $'{\r\n"body": {\r\n"content": "Hello world"\r\n}\r\n}\r\n'

Kindly let me know what I am doing wrong

Answer 1

Hi Yadav, Prakhar | RSI

Thank you for posting your question in the Microsoft Q&A forum. 

I’ve conducted a test of the Microsoft Graph API in my development environment, and everything appears to be functioning correctly.

Below, I’ve outlined the steps I followed to successfully send a message to a Microsoft Teams chat, which may help you troubleshoot your issue: 

1. Retrieve the Chat ID 

GET https://graph.microsoft.com/v1.0/me/chats 

From the response, identify and copy a valid chat ID. 

2. Send a Message to the Chat 

POST https://graph.microsoft.com/v1.0/chats/{chat-id}/messages 

Replace {chat-id} with the actual ID from step 1. 

Ensure that your application has been granted the following delegated permissions: 

ChatMessage.Send 

Chat.ReadWrite 

Group.ReadWrite.All 

These permissions are essential for sending messages to Teams chats. You can find detailed information about each permission here: Microsoft Graph permissions reference - Microsoft Graph | Microsoft Learn 

If you're unsure how to configure permissions, please follow these steps: 

If these permissions are not properly configured, you may encounter errors such as 401 Unauthorized or 404 Not Found when making API calls. 

I hope these details help you resolve the issue.  

Please understand that our forum is a public platform, and we will modify your question to cover your organization domain name in the description. Please notice to hide these personal or organization information next time you post error or some information to protect personal data. 

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