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Coupa Supplier Portal REST API

The Coupa Supplier Portal (CSP) REST API allows you to integrate CSP data with third-party systems.

The API allows you to retrieve CSP data. Using this API, you can:

  • Retrieve all invoices in the CSP.

  • Retrieve data for a single CSP invoice.

Authentication

The CSP API uses OAuth 2.0 and requires creating an OAuth 2.0 client in the CSP and authenticating directly with your CSP instance. For more information, see Set Up Authentication for the Coupa Supplier Portal REST API.

Base URL

The API uses your CSP URL, for example: 

https://supplier.coupahost.com/api/v1/invoices