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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / Business Central API C...
Small and medium business | Business Central, N...
Suggested answer

Business Central API Connection - The credentials provided are incorrect

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Posted on by AmplioSolutions 13

Hi All,

Thanks in advance for anyone that might help me. I've read as many posts as I can find on this subject but unfortunately none of these are helping me.

I have setup POSTMAN and a Python script to access the REST api from Business Central with partial success and i'm confused.

I have setup everything I can find within Azure, the App, all the secrets, client id's etc. I've setup some role permissions and granted consent etc

I have setup POSTMAN, I can retrieve a token successfully which is great and shows I'm using the right information however when I try to use that token and retrieve anything from Business Central it tells me that "the Credentials Provided are incorrect".

The URL i'm trying to get is: https://api.businesscentral.dynamics.com/v2.0/[My TenantID]/Sandbox/api/v2.0/companies

If anyone can help me diagnose and fix the issue id be very grateful.

Thanks

Lee

  • AmplioSolutions Profile Picture
    AmplioSolutions 13 on at
    RE: Business Central API Connection - The credentials provided are incorrect

    Thank you Inge, I do feel like this is where the issue lies but I'm struggling to pinpoint the problem.

    So I have gone to Azure Active Directory page in business central, created an entry using my Client ID, given it permissions for D365 BUS FULL ACCESS and enabled it. Then clicked the Grant Consent button which successfully granted.

    I'm not sure if there's anything else I need to do? If there is (and i'm hoping there is) I think this will be the missing piece of the puzzle.

    Regards

    Lee

  • YUN ZHU Profile Picture
    YUN ZHU 79,278 Super User 2025 Season 1 on at
    RE: Business Central API Connection - The credentials provided are incorrect

    Hi, I just tested it and it seems to work fine.

    My test endpoint:

    api.businesscentral.dynamics.com/.../companies

    pastedimage1676251460313v1.png

    More details: https://yzhums.com/20690/

    Hope this helps.

    Thanks.

    ZHU

  • Suggested answer
    Inge M. Bruvik Profile Picture
    Inge M. Bruvik 999 Moderator on at
    RE: Business Central API Connection - The credentials provided are incorrect

    Have you checked the API's permissions inside Business Central so it actually can access the company list?

  • AmplioSolutions Profile Picture
    AmplioSolutions 13 on at
    RE: Business Central API Connection - The credentials provided are incorrect

    Thanks Daniele,

    I have also completed this. My last resort is posting in this forum, if anyone can offer any troubleshooting advice I would be grateful

  • Suggested answer
    DAnny3211 Profile Picture
    DAnny3211 9,274 Moderator on at
    RE: Business Central API Connection - The credentials provided are incorrect

    hi

    look this

    https://www.kauffmann.nl/2022/02/23/configuring-business-central-for-azure-active-directory-authentication-and-oauth-2/

    DAniele

  • AmplioSolutions Profile Picture
    AmplioSolutions 13 on at
    RE: Business Central API Connection - The credentials provided are incorrect

    Thanks Daniele,

    I can successfully retrieve a token, I cannot create anything like your post as I don’t have the company to send the request too… hence why I am trying to retrieve the company list.

    I don’t understand why it’s saying my credentials are incorrect

  • Suggested answer
    DAnny3211 Profile Picture
    DAnny3211 9,274 Moderator on at
    RE: Business Central API Connection - The credentials provided are incorrect

    hi

    look  this

    danieleincalza.blogspot.com/.../oauth20-business-central-app.html

    danieleincalza.blogspot.com/.../business-central-bye-bye-basic.html

    DAniele

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