APIs in Business Central showing authentication failed

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Posted on by Jyotsna NAV

585

Hello Experts,

I am using Basic Authentication and web Access Key to hit Business Central API: https://api.businesscentral.dynamics.com/v1.0/domainname/Sandbox/api/beta/companies with a GET request.

Unfortunately, I am getting an error from Postman:

{

"error": {

"code": "Authentication_InvalidCredentials",

"message": "The server has rejected the client credentials. CorrelationId: 5e0b0833-cef9-4e89-9628-56400f373b2a."

}

Could you please help me out with this.

Thank you in advance.

Regards

Jyotsna Oberai

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Teddy Herryanto (Th... 14,284 Super User 2025 Season 2 on at

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Make sure you use the User Name and Web Service Access Key that are written in the User Card.

That user also needs to have BC license in that environment. You can't use partner login.

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Jyotsna NAV 585 on at

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Thank you for the revert.

The credentials are correct. The URL is the one that exists in web service: https://api.businesscentral.dynamics.com/tenantId/Sandbox/api/beta

Still no luck. Please suggest..

Thank you.

Regards

Jyotsna Oberai

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Teddy Herryanto (Th... 14,284 Super User 2025 Season 2 on at

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Are you using the customer's user ID or partner user ID ?

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Binesh 7,885 on at

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Hello Jyotsna,

if you are make sure your web access key is correct then just make a small change in the API URL

Instead of v1.0 replace with v2.0 as shown below

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Stefano Demiliani 37,166 Most Valuable Professional on at

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It seems you're missing the API version. Correct url:

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

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Jyotsna NAV 585 on at

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I tried that. But I am still facing the same error. Don't know what the problem is :(

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Stefano Demiliani 37,166 Most Valuable Professional on at

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The endpoint I’ve provided works.
If the endpoint is correct, please check username (use it without domain), web service access key and its expiration date.

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Jyotsna NAV 585 on at

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Hi Stefano,

It worked! I was missing v1.0 in the url. Thanks a lot!

Thank you everyone for your help :)

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adel@vsi 45 on at

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Following worked for me for basic authentication.

1. User user name without domain

2. If using google chrome, user developer tools to get the web-services key. Simply copy doesn't copy whole thing.

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