---
title: SOAP API Overview
slug: campaign/docs/soap-api
docTags: 
createdAt: 2026-07-02T19:01:45.097Z
---

The SOAP API is compatible with the most common platforms (e.g. PHP, .NET) and thus can be used with any kind of data processing system.

:::hint{type="info"}
**Tip**
Optimizely Campaign supports Transport Layer Security (TLS) version 1.2 and higher to encrypt data transmission via API requests.
:::

To download the PHP client API and the WSDLs for the SOAP API, click here: [optimizely-campaign-soap-api.zip](https://world.optimizely.com/globalassets/downloads/episerver-campaign/optimizely-campaign-soap-api.zip)

Find the WSDLs for the coupon code system under the following links:

- [https://api.campaign.episerver.net/soap11/addons/CouponCode?wsdl](https://api.broadmail.de/soap11/addons/CouponCode?wsdl)
- [https://api.campaign.episerver.net/soap11/addons/CouponBlock?wsdl](https://api.broadmail.de/soap11/addons/CouponBlock?wsdl)

You can execute virtually any function of Optimizely Campaign from a remote system without using the web browser and logging into your client manually. The interface is bi-directional, which means that you can send and receive data from/to Optimizely Campaign. The following processes can be executed with the SOAP API:

- Create recipient lists and add new recipients
- Edit recipient lists and recipients
- Update and synchronize blacklists
- Create temporary and permanent target groups
- Create mailings, add content and dispatch mailings
- Bounce management

## Modifications since the previous version

The [getOutBounces](docId\:kVVzdP-hXPzVTch-yukWR) operation was added.