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Connect to external API from Business central

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Posted on by Meriah

Hello,

I need to connect to an external application and send master data (customer, contact,...) from business central to their interface through API.

With discussing with the external partner, I discovered they used a different type of authentication than OAuth2 or Basic Auth .
You will find below the script that I lmust launch in Postman at each API call to get the token .

Could you tell me if I can run this script via Business Central to request their API and send my data ?

Thanks

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PConijn 51 on at

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Connect to external API from Business central

I don't know if you have already solved this, but there is a good post by Arend Jan Kaufmann on the subject (with example code).

https://www.kauffmann.nl/2021/08/04/service-to-service-authentication-in-business-central-18-3-how-to-use-in-al/
Meriah 26 on at

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RE: Connect to external API from Business central

Finally, I succeeded to get the token json response file, but how can I get the token value to save it and use it later ?

Explanation :

1/I sent Json request (AL function)

{"method":"login",

"params":{

"login":"XXXXX@XXXX.com",

"hash":"0e39d0c214eb0d2257e4c8004a24da89258a7d02",

"timestamp":1683294731

}}

2/I got Json response (AL Function) but I need retreive the token value .

{"jsonrpc":"2.0",
"result":{
"authToken":{
"credId":98903,
"login":"XXXXX@XXXXX.com",
"end":1683298331,
"type":"basic",
"hash":"85d26fcdc118c7375b1a8ea1d17deac576ef2142"
},
"login":"XXXXX@XXXXXX.com",
"id":98903,
"userId":98723,
"uniqueUserId":"stage_98723"
},
"id":null
}

If I do the same thing in postman, I have a token value in authToken var . And I need to get this value in Business Central.

Any idea ?

Thanks
Meriah 26 on at

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RE: Connect to external API from Business central

Hello,

Thank you for all your answers.

@YUN ZHU : I need to write data from BC to the external tool, not a fetching data from BC .

So I need to connect to the external api and send data in json format .

I will try to use the HttpClient Data Type ...and keep you informed .

Thanks
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YUN ZHU 84,346 Super User 2025 Season 1 on at

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RE: Connect to external API from Business central

Hi, just to add some info.

I'm not sure what the external application is, if it's fetching data from BC, please note that Basic Auth is no longer available in the SaaS version, including in the Sandbox environment. More details: https://yzhums.com/37488/

You can use HttpClient Data Type to do it.
https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/methods-auto/httpclient/httpclient-data-type

In addition, there are a few simple examples below, hoping to give you some hints.

https://yzhums.com/21873/

https://yzhums.com/33195/

Thanks.

ZHU
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Inge M. Bruvik 1,029 Moderator on at

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RE: Connect to external API from Business central

yes you can do that. You can either do it using Power Automate or you can do it writing AL code.

AL have a built in Http client that will handle this perfectly fine.

Here is documentation on the http client.

learn.microsoft.com/.../httpclient-data-type
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Shrey Chauhan 276 on at

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RE: Connect to external API from Business central

You can refer this

learn.microsoft.com/.../enabling-apis-for-dynamics-nav

or

Custom Api

learn.microsoft.com/.../devenv-develop-custom-api