Public APIs : A collective list of free APIs for use in web development.
kimono : Turn websites into structured APIs from your browser in seconds
Cool QL Cool : CoolQLCool (CQC) is an open source GraphQL server that allows you to turn websites into GraphQL APIs.
Supabase : Supabase is an open source Firebase alternative. Create a backend in less than 2 minutes. Start your project with a Postgres Database, Authentication,...
Swagger : Swagger is a powerful open source framework backed by a large ecosystem of tools that helps you design, build, document, and consume your RESTful APIs...
Bluepine is a DSL for defining API Schema/Endpoint with the capabilities to generate Open API (v3) spec, validate API request and serialize object for API response based on single schema definition.