Welcome to the EMS development portal

A space where developers and product owners can access easy-to-use API keys to integrate online payments directly into your desired website.

From software developers, to website managers, to webshop owners this is the place for all things related to EMS Online its APIs and documentation. We’re here to help with any transaction, any way.

Given the different levels of coding (and financial) expertise of our users, we try to explain things at different levels. If you have been at this for a while, then use the left-hand pane to navigate straight to the codes and access keys.

If you’re newer to things, our portal is set up to educate and inform as you work through the steps. This page provides an overview of the EMS Online API and how get started with them, so if you identify yourself as less experienced, then just keep scrolling.

Of course there are some parallel steps that have been omitted (like signing a contract), but a picture is worth a thousand words. Here’s the visual overview:

EMS Online makes use of a REST API with a JSON body.

Also referred to as RESTful API, this fancy acronym refers to an architectural style for an application program interface (API) that uses HTTP requests to access and use data.

Use this API url: https://api.online.emspay.eu. Jump to the REST API Authentication and HTTP status codes for more information.