Explore These Top Communication APIs


APIs have a big job to do. They enable apps to speak to other apps. They also help people communicate better.

When you’re building an app, why roll your own if there’s an API for that? Check out who we highlight in the latest version of our APIs Powering the Future of Communications Postman featured list. These companies are empowering the exchange of information and news. Make their APIs part of your developer toolkit, and try them out by forking their collections to your own workspace.

Let’s see who made the list this time.


Feishu (“flying message”) is the China-only version of Lark, a productivity app used for team collaboration. The API integrates messaging, video conferencing, schedule management, collaborative documents, cloud storage, email, and workflow applications to provide a seamless collaboration experience on all your devices. Try out the API in this Feishu public workspace.


Nylas helps developers build email, scheduling, and work automation features from the Nylas Communication Platform into their own applications. Try out the API in this Nylas public workspace.


Klaviyo provides email and SMS messaging automation for marketing campaigns. Their developer docs use Postman to guide new users to make their first call. Try out the API in this Klaviyo public workspace.

Meta (formerly Facebook)

Meta provides several public APIs for developers, including the WhatsApp Business API to programmatically send and receive messages to your own systems. Using the API, businesses can connect thousands of agents and bots to interact with customers programmatically and manually. Additionally, the API can be integrated with backend systems, such as CRM and marketing platforms. Try out the API in this WhatsApp Business Platform public workspace.


Lob streamlines workflows around direct mail, address data, identity verification, and shipment deliverability. They also provide a helpful video to help you get started making your first API calls to automate direct mail and address verification. Try out the API in this Lob public workspace.

There’s an API for everything in the Postman API Network! This hand-picked list is an interesting cross section of APIs that empower the exchange of information and news. Learn about their tech, explore their APIs for free, and don’t forget about other Postman-featured APIs, workspaces, and collections in the Public API Network. You can see who made it on the list last time here. And if you have other communication APIs to recommend, let us know in the comments below.

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