Third parties are not direct users of Ad Manager, in that they may not have their own Ad Manager network. Instead, they create services or integrations with Ad Manager for their clients, who are Ad Manager customers. This guide covers the basics of third party integrations by providing best practices, tips, and tricks. This guide assumes you have a working knowledge of the Ad Manager API. If you're unfamiliar with the Ad Manager API, see our [getting started documentation](https://developers.google.com/ad-manager/api/start). ## Getting started as a third party To use the Ad Manager API to access an Ad Manager customer's network just follow the guidelines below. No additional approval from Google is required, though note that by accessing and/or using the Ad Manager API you agree to the Ad Manager API [terms and conditions](http://www.google.com/doubleclick/tos/dfp-api-terms.html). ## How to test your Ad Manager integration as a third party As a third party, you may be wondering how to test your Ad Manager integration before running against your clients' production networks. The recommended approach is to [create a test network](https://developers.google.com/ad-manager/api/environments). You don't need to be an Ad Manager customer to do this. Anybody with a Google Account can create a test network. Note, however, the [differences between test and production networks](https://developers.google.com/ad-manager/api/environments). Test networks cannot serve ads. Test networks will also not necessarily contain all the features that your clients may have available on their production networks. If you need to test against Ad Manager features that are not available on your test network, one option is to purchase access to a non-test network through an Ad Manager reseller. In addition, you should be clear with your clients about what features they need to have available on their production network in order for your application to work properly. Your application should handle cases where features may not exist by either catching exceptions and failing gracefully or keeping a list of your clients and what features each one has or doesn't have. It should be your client's responsibility to work with their contact at Google to manage features on their network. ## Authentication: How to properly access a client's Ad Manager network In order for your application to access your client's Ad Manager network, you need to set up your authentication workflow in a secure manner. This involves two steps: 1. Create a Google Account email address that you will use to access your client's network. 2. Have the client add this account as a user to their Ad Manager network. For step 1, you can create either a separate Google Account for each client, or a primary one that you will use for all clients. The former option is more secure in the case that one of your accounts is compromised. The latter means you only need to do step 1 once. No matter what you do for step 1, in step 2 you'll need to ask each new client to add the appropriate Google Account you created for them as a user to their Ad Manager network. ### 1. Creating a Google Account There are various ways to create a Google Account that can be added to an Ad Manager network. - Option 1: Create an [OAuth2 service account](https://developers.google.com/identity/protocols/oauth2/service-account), which generates a service account email address for you that acts as a Google Account. [Instructions for creating a new service account](https://developers.google.com/ad-manager/api/authentication#oauth). - Option 2: You can create a regular Google Account ("Gmail" account) by [signing up as a new user](https://accounts.google.com/signup/v2/webcreateaccount?flowName=GlifWebSignIn&flowEntry=SignUp). If you already have a Google Account, complete this signup in an incognito window or new browser session. Or, if your company uses [Google Workspace](https://workspace.google.com/), you can create a Google Account in your company's domain and use that instead. For the purposes of this guide, we will refer to both of these as a "regular" Google Account. ### 2. Ask the client to add your Google Account to their network After you've obtained a Google Account to access your client's network, ask them to add the account as a new user in their Ad Manager network. - If you are providing them with an OAuth2 service account email address, have them [add it to their network](https://developers.google.com/ad-manager/api/authentication#configure). - If you are providing them with a regular Google Account, have them [add your account](https://support.google.com/admanager/answer/3059181) as a user to their network. No matter which route you take, ensure that you discuss with your client what [roles and permissions](https://support.google.com/admanager/answer/177403) your account should have so that your application can access the data it needs on your client's network. Now you can start making API calls to your client's Ad Manager network. Make sure you set the [networkCode SOAP header](https://developers.google.com/ad-manager/api/soap_xml) to the client's network code you are making the API call against. All of our client libraries allow setting this programmatically. For example, in the ads Java client library, you can [programmatically set the network code](https://github.com/googleads/googleads-java-lib/blob/2.1.0/modules/ads_lib/src/main/java/com/google/api/ads/dfp/lib/client/DfpSession.java#L216) when building a DfpSession instance. ## Keep up to date with the API It's important that you stay up to date on which API versions are deprecated or sunset and when new versions are released. You don't want to be caught off guard when a version is sunset and risk breaking your clients. We are not always able to reach out to third parties about impending deprecations and sunsets as we do for our customers. Thus, it is your responsibility to subscribe to one of our three main channels for API updates and adjust your notification settings: - Our [Ad Manager API Sunsets Announcements Group](https://groups.google.com/g/dfpapi-sunset-announce). - Our [Ads Developer Blog](https://ads-developers.googleblog.com/). We also provide a [deprecation schedule](https://developers.google.com/ad-manager/api/deprecation) on our developer's site that you should monitor regularly.