The evolving landscape of API protocols in 2023

This is a guest post by Alex Xu, author of the System Design Interview book series. The API landscape is constantly evolving,…

How to choose between REST vs. GraphQL vs. gRPC vs. SOAP

To create the Postman Open Technologies Knowledge Base API, I’ve been following our team’s internal API design playbook, which covers the strategy,…

What Is a SOAP API?

Originally published by Kin Lane on September 16, 2020 Simple Object Access Protocol (SOAP) is a message specification for exchanging information between…

REST vs. SOAP APIs

This is a guest post written by Chris Staudinger, co-founder and COO of levelupcoding.co, a company that offers visual learning to simplify…

Postman Now Supports WSDL

We’re excited to announce that Postman now supports WSDL (Web Services Description Language) files, adding to the multiple API specification formats that…

API Basics: A Beginner’s Guide to APIs

This is a guest post written by Subho Halder, co-founder and chief information security officer at Appknox. Applications these days are witnessing…

API 101: Learning with Open Access SOAP APIs

Even though the philosophy of REST (Representational State Transfer) dominates today’s world of APIs, the older SOAP (Simple Object Access Protocol) is…

Making SOAP Requests with Postman

Lots of people call Postman “a REST client.” They’re not wrong. However, Postman is actually used for any calls sent over HTTP….

Postman Makes SOAP Requests Too

Update, April 2020: If you want to read the latest about SOAP requests, check out our new post called Making SOAP Requests…

Importing SoapUI projects into Postman

We received a lot of feedback from SoapUI users who wanted to import their projects into Postman. Postman’s support for Swagger means…

Making SOAP Requests Using Postman

2020 Update: If you want to read the latest about SOAP requests,  check out our new 2020 version of Making Soap Requests…