Best Marketing APIs (2025)

Manage ads and campaigns using the Facebook API. Marketing APIs are a collection of Graph API endpoints that can be used to help you advertise on Facebook. To get started with advertising on Facebook, we recommend you learn about Facebook's Ad Campaign Structure, to understand the objects you are working with and how they relate to each other. The Marketing API is an HTTP-based API that you can use to programmatically query data, create and manage ads, and perform a wide variety of other tasks.

The HubSpot API is a set of RESTful endpoints that allows developers to interact with and access data from the HubSpot CRM platform. With this API, developers can create custom integrations and applications to automate their marketing, sales, and customer service workflows. The API provides access to a wide range of HubSpot features, such as contacts, deals, companies, tickets, and more. It is flexible and easy to use, with a variety of client libraries available in different programming languages. The HubSpot API also supports OAuth2 authentication and provides detailed documentation, making it an ideal solution for developers looking to build custom integrations with the HubSpot platform.

Email marketing, ads, landing pages, and CRM tools to grow your business on your terms. Now use MailChimp API to integrate all functionalities of MailChimp into your custom applications.

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Provides programmatic access to various advertising technologies. You should consider using the Bing Ads API if your business model resembles: 1) You are a direct advertiser managing your own ad spend and you want to integrate our PPC marketing with your internal inventory management or conversion tracking systems. 2) You are a tools vendor developing advertising management solutions for advertisers or agencies. 3) You are an advertising agency and manage ad campaigns for many clients. 4) You are an aggregator and want to build Bing Ads API applications to manage the campaigns of your advertising clients.

Optimizely is the world's leading experimentation platform, empowering marketing and product teams to test, learn and deploy winning digital experiences, every time. Improve your product quality and velocity with feature management. Drive measurable impact with product experimentation. Optimize the experience across any platform including websites, backend code, mobile and conversational apps. Target your messaging, personalize your campaigns, and ultimately drive substantial growth for your business. Powerful, easy to use solutions, to test what messages, imagery, and offers help increase conversion, retention, and lifetime value.

With Pipedrive CRM designed for salespeople, by salespeople, you’re able to do more to grow your business. Easily build integrations with our API and reach over 90k companies in the Pipedrive Marketplace. Pipedrive is a sales CRM with an intuitive RESTful API. You can use our API to create public or private apps using OAuth and integrations via API token. Public apps and integrations work directly with Pipedrive and are available in the Pipedrive's Marketplace.

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