Help with API connection to Xero oAuth 1.0

Help with API connection to Xero oAuth 1.0


Hi everyone,

I'd like to connect my OutSystems app to Xero using oAuth 1.0

I tried to get some inspirations from all of the links below but I haven't been able to adapt it to my needs with Xero:

All I would like to do is to Post invoices to Xero.
I don't even mind using Zapier if this can ease the integration.

I'm currently stuck in the oAuth 1.0 authentication   

Thanks a million if you can help and please let me know if you need more information.


I'm getting close with this error message:


Now I need to know how to create this signature using SHA1

Help? Anyone? ^^

Hi Melwyn,

When you are integrating Xero API with outsystem, this error come because you are not using token key & secret key. In Xero, when you call main xero api to get/put/post method before that you need to call 3-4 api just to know token key, scret key etc.


Rajat Agrawal