There was a great list on now discontinued site qahelp.net. I managed to save it through yandex cache (even google cache and web archive couldn’t help).
Difference between API and web services
- API vs Web Service, Difference between web API and web service, Difference between API and web service
- What APIs Are And Why They’re Important — Brian Proffitt
- What are web services (section) — Nicholas Chase
- Introduction to Web Services (PDF) — Ioannis G. Baltopoulos
SOAP and REST
- Understanding SOAP (section) — Nicholas Chase
- What is REST? (video) — Todd Fredrich
- Understanding SOAP and REST Basics And Differences — John Mueller
- How to GET a cup of coffee — Jim Webber, Savas Parastatidis & Ian Robinson
API and web services testing
- API Testing: Why it matters and how to do it — Michael Churchman
- Johnny mnemonic — ICEOVERMAD — Ash Winter
- The API Testing Dojo — Smart Bear
- API Testing: UI Tools — Avinash Shetty
- API Testing: Developer Tools — Avinash Shetty
- WTEU-53 — An introduction to API Testing — Amy Phillips
- Some API Testing Basic Introductory Notes and Tools — Alan Richardson
Deep dive into REST API
- How to design a REST API — Antoine Chantalou, Jérémy Buisson, Mohamed Kissa, Florent Jaby, Nicolas Laurent, Augustin Grimprel, Benoit Lafontaine
- The commoditization of the user interface — Todd Friedrich
- REST API application layers — Todd Friedrich
- REST API design: Resource modeling — Prakash Subramaniam
- Richardson maturity model — Martin Fowler
API security testing
- How to Hack an API and Get Away with It (Part 1 of 3) — Ole Lensmar
- How to Hack an API and Get Away with It (Part 2 of 3) — Ole Lensmar
- How to Hack an API and Get Away with It (Part 3 of 3) — Ole Lensmar
- WTEU-56 — Security testing for APIs — Dan Billing
Service virtualization
- What is service virtualization — John Mueller
- Hardening Your Application Against API Failures with API Virtualization — Lorinda Brandon
- 4 Ways to Boost Your Test Process with Service Virtualization — Bas Dijkstra
Introduction to microservices
- Microservices — Martin Fowler
- Introduction to microservices — Chris Richardson
- Delving into the Microservices Architecture — John Mueller
- How we build microservices at Karma — Stefan Borsje
- Why 2015 will be the year of microservices — Eric Knorr
Microservices testing
- Testing Strategies in a Microservice Architecture — Toby Clemson et al.
- Performance Issue Considerations for Microservices APIs — John Mueller
- 8 Questions You Need to Ask About Microservices, Containers & Docker in 2015 — Andrew Phillips
- Integration tests are a scam — JB Rainsberger
- Throw away your integration tests (slides) — Beth Skurrie
More on API
What is API management — A Brief Primer — Navdeep SidhuUpd. resource is no more available- API management platform capabilities — Jeevak Kasarkod
- The API is the Invisible Hand Behind the Internet of Things — Jennifer Riggins
- Working with Hypermedia APIs — John Mueller
- Testing Challenges Associated with Machine Learning APIs — John Mueller