Amazon API Gateway is one of the default ways to create HTTP APIs in AWS. In essence, API Gateway implements the web layer of your application as a managed service in AWS, which allows you to focus on business logic rather than infrastructure.
AWS AppSync is a platform for rapidly constructing GraphQL APIs that can address a variety of back-ends.
Mapbox is a mature mapping platform that provides a suite of products:
Pact is a tool for consumer-driven contract testing. It provides a way of testing the integration between microservices without needing to perform end-to-end testing.