Sashko Stubailo and Jonas Helfer created graphql-tools, a tool that simplifies the process of creating GraphQL APIs using the GraphQL schema definition language. The project started as a way to make working with GraphQL easier, particularly for UI developers who want to fetch data quickly and efficiently without having to deal with complex server-side logic. graphql-tools allows users to create a schema using the GraphQL Schema Definition Language, import custom scalar types, mock API responses based on a schema definition, handle common errors, and more. The tool is production-ready and has been battle-tested by dozens of companies in their production applications. It provides a regular GraphQL.js schema object that can be used with favorite GraphQL server middleware. The authors aim to keep graphql-tools lightweight and un-opinionated, encouraging users to submit issues or pull requests for potential improvements. With the release of version 1.0, the project is now more accessible to new developers, including those building their first GraphQL server, as demonstrated by a "hello world" example that showcases how to create a simple GraphQL schema using graphql-tools. The tool also highlights the benefits of relationships between types in GraphQL, such as one-to-many and one-to-one relationships, which can be defined using the schema language. Mutations are also supported, allowing users to update data and then fetch new results. The project is actively hiring for open-source, backend, and other roles to work on next-generation API technology.