Confluence REST API authentication problem

[Krystian Balak]

Hello, I have a problem getting the Confluence Rest API data from an external tool (c# code). I can do this with a browser, but I cannot get data from Postman or my program. Below, I awill describe what I did:

1. I checked the documentation (https://developer.atlassian.com/server/confluence/confluence-server-rest-api/)
   1. In Authentication header I found that I can’t use my ‘personal access token’ due to the version.
   2. I found page that describes how to use basic authentication. (https://developer.atlassian.com/cloud/confluence/basic-auth-for-rest-apis/).
   3. I created API token on page (https://id.atlassian.com/manage-profile/security/api-tokens).
   4. I built a string based on my email and api token and encoded it to the base64.
   5. I tried to get data in Postman, but I got ‘Status 401 Unauthorized’
   6. when I opened the same address in browser, I got response but without results.
   7. when I opened one of the confluence pages and then I repeated request – I got the results in the browser but still nothing in Postman.
   8. Then I Noticed in History that I need to login to Confluence first before sending the request.
   9. I found a endpoint used for login (/dologin.action) and I made a post request, but still I couldn’t login.
   10. I got the same result when I opened the page in a browser (I am sure that I used a correct credentials) – it seems like I don’t have a Confluence account – but a Microsoft account, as we can see in the history [1. 8)].
2. The second way that I tried was to use OAuth 2.0 (3LO) apps
   1. I created app in (https://developer.atlassian.com/console/myapps/).
   2. I configured OAuth 2.0 in Authorization section.
   3. I added Permissions.
   4. When I tried to open authorization URL, I got message ‘Something went wrong’.

My questions:

1. What I do wrong? What possibilities do I have to get data from Confluence rest API?
2. Should I login to Microsoft Online and then I will get cookies that I can use in my requests to download data?
3. Will I get data from the rest API when I have local confluence account?

Important information:

1. Atlassian Confluence 7.4.8
2. I don’t have Confluence Administrator rights