Do I need a server for GraphQL?

As you note, it’s “just” a query language, and you don’t need a server per se . For example, in the reference graphql-js implementation, you can just call graphql with a query; similarly, in graphql-ruby, you can #execute a query on a schema object. The usual case for GraphQL “in the wild” is as an API layer, though.

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Which server is best for GraphQL?

While Apollo Server is compatible with any GraphQL client, it is an obvious choice if you are already using Apollo Client in your project. Because of the vibrant Apollo ecosystem and advanced production-ready tooling, Apollo Server is a great choice for larger, more nuanced projects.

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