API Security Checklist : Checklist of the most important security countermeasures when designing, testing, and releasing your API.
npoint.io : JSON storage bins with schema validation
Quicktype : Quicktype generates types and helper code for reading JSON in C#, Swift, JavaScript, Flow, Python, TypeScript, Go, Rust, Objective-C, Kotlin, C++ and ...
A specification for building APIs in JSON. Clients built around JSON API are able to take advantage of its features around efficiently caching responses, sometimes eliminating network requests entirely.