We looked through thousands of Advertising API documentation pages to find the best APIs for your use. Here is a list of the ones we found to be the most popular and to fit all budgets.

API to manage audiences, integrate your data, and send timely, relevant email campaigns.

Here is a list of features of Mailchimp Marketing API:

- Leverage the Marketing API to integrate your users’ data with Mailchimp’s marketing scale.

- **Create an audience and add contacts**
Integrate your application with the Marketing API to create and add contacts to a new audience.

- **Organize your contacts with tags**
Use tags to bring your application’s email targeting and organization strategy into Mailchimp.

- Sync events in your app with Mailchimp to create powerful email automations at scale.

- **Track events that trigger automations**
Monitor and act on your users’ behavior outside emails with the Events endpoint.

- **Run requests asynchronously with the batch endpoint**
Scale large or long-running calls to the Marketing API with batch requests.

- Use the Marketing API to keep your data in sync with Mailchimp.

- **Synchronize audience data with webhooks**
Keep your data store in sync with your Mailchimp audience via webhooks.

- **Access data on behalf of other users with OAuth 2**
Integrate your product with your users’ Mailchimp accounts by authenticating via OAuth.

Mailchimp Marketing API

The Twitter Ads API connects developers to Twitter's advertising platform to build solutions to meet the needs of Twitter's advertisers around the world.

Here are some of the key features of Twitter Ads API:

- **Campaign management**
Programmatically create, schedule, and manage ad campaigns to engage people on Twitter.


- **Creatives**
Draft and publish Tweets, extend the functionality of Tweets with Cards and manage and upload images and videos.


- **Custom audiences**
Create and manage Tailored Audiences using Twitter, web or mobile data you provide.


- **Advertising analytics**
Use async and synchronous API endpoints to retrieve granular insights of ad campaigns by a full range of metrics.



Twitter Ads API

The AdSense Management API allows publishers to access their inventory and run earnings and performance reports.

**AdSense Management API**
_The AdSense Management API allows publishers to access their inventory and run earnings and performance reports._

The AdSense Management API is built on HTTP and JSON, so any standard HTTP client can send requests to it and parse the responses.

However, the Google APIs client libraries provide better language integration, improved security, and support for making calls that require user authorization. The client libraries are available in a number of programming languages; by using them you can avoid the need to manually set up HTTP requests and parse the responses.

- The Google AdSense Management API is ideal for developers whose users create their own content through blogging, web publishing, forum/wiki/community creation, or any other application where substantial web content is generated. 

- Using the AdSense API, developers can let users sign up for AdSense through their site or program, generate detailed performance reports for users, and choose how the AdSense revenue is shared with our revenue sharing program. 

- Additionally users can create accounts to store publisher website information, then generate ad code snippets and filter out unwanted ads. A previous SOAP version has been deprecated in favor of REST with responses formatted as JSON.


50 of the Best Advertising Apis