What is Apollo server?

Apollo Server is an open-source GraphQL server compatible with any GraphQL and Apollo Client. The server builds a GraphQL API that uses data from any source.

Apollo Server can be used as:

• An autonomous GraphQL server, even in a serverless environment
• An app’s Node.js middleware add-on tool, e.g. Express or Fastify
• A federated data graph gateway

Apollo Server provides:

• An easy setup for client developers to fetch data
• Iterative adoption, adding features per request or need
• Compatibility with data sources, building tools, and GraphQL client
• Ready-to-production mode to ship features faster