Skip to main content

Notifications

Community site session details

Community site session details

Session Id :
Power Automate - Using Connectors
Answered

Integrate API with custom connectors

(0) ShareShare
ReportReport
Posted on by

Hello,

I'm trying to integrate a basic and simple API, which works with HTTP form by POST request. The API is a sign provider which sign a PDF file I send, and return it signed (the field is "file".)

 

I will launch the action by the upload of a file in OneDrive Enterprise (the pdf which will be signed). Then, the new signed pdf that the API should return will be upload in OneDrive too.

But, I'm not sure about how to achieve the integration of the API, by custom connector. Could you confirm me it is possible ? I see all the good options in it (select POST etc) but I don't know what to put in Head and Content (I don't know much about json etc).

I got a 500 internal error when I try the custom connector, because I don't know what to put in the content.

There is just 1 field I want to exploit, the "file" I am supposed to tell in the flow after creating this custom connector.

 

The API documentation only gives the URL and the fact that form is encoded with mime-type ’application/multipart-form-data’.

Thx for your support,

  • Verified answer
    v-alzhan-msft Profile Picture
    on at
    Re: Integrate API with custom connectors

    Hi @Florian34 ,

     

    You could achieve the integration of the API by custom connector, and could you please share more details about the error message?

    Please refer to link below to learn more about the custom connector in microsoft flow:

    https://docs.microsoft.com/en-us/flow/developer/register-custom-api

     

    Best regards,

    Alice       

     

    Community Support Team _ Alice Zhang
    If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Under review

Thank you for your reply! To ensure a great experience for everyone, your content is awaiting approval by our Community Managers. Please check back later.

Helpful resources

Quick Links

Paul Stork – Community Spotlight

We are honored to recognize Paul Stork as our July 2025 Community…

Congratulations to the June Top 10 Community Leaders!

These are the community rock stars!

Announcing the Engage with the Community forum!

This forum is your space to connect, share, and grow!

Leaderboard > Power Automate

#1
Michael E. Gernaey Profile Picture

Michael E. Gernaey 497 Super User 2025 Season 1

#2
David_MA Profile Picture

David_MA 436 Super User 2025 Season 1

#3
Riyaz_riz11 Profile Picture

Riyaz_riz11 244 Super User 2025 Season 1

Featured topics