apollographql/apollo-server
Apollo Server
Apollo Server is a spec-compliant JavaScript implementation for building GraphQL APIs that resolve queries and mutations based on a defined schema. It functions as a Node.js framework that integrates GraphQL functionality into various web frameworks and serverless environments through middleware.
The project provides a federated GraphQL gateway that aggregates multiple distributed subgraphs into a single unified entry point. It includes a built-in interactive API sandbox for testing operations at the server endpoint and a schema registry client to automate the synchronization of API definitions with a central registry.
The server supports a schema-first execution pipeline with capabilities for multipart request processing for file uploads, response and parsed document caching, and request lifecycle plugins. Operational features include structured logging, health check management, usage metrics reporting, and security middleware to prevent request-based attacks.
Features
- GraphQL Implementations - Provides a spec-compliant JavaScript implementation for building GraphQL APIs that resolve queries and mutations based on a schema.
- Server Implementations - Provides a spec-compliant JavaScript implementation for building GraphQL servers that resolve queries and mutations based on a schema.
- Federated Data Gateways - Provides a unified interface to distribute a single GraphQL query across multiple backend subgraphs.
- Node.js Server Frameworks - Integrates GraphQL functionality into existing Node.js web frameworks like Express or Koa via middleware.
- GraphQL Integration Middleware - Integrates GraphQL functionality into various Node.js web frameworks and serverless environments through pluggable middleware.
- GraphQL APIs - Provides a comprehensive framework for building spec-compliant GraphQL APIs using a schema-first approach.
- Federation Engines - Implements a federated gateway that composes multiple independent subgraphs into a single unified API.
- Schema-First Development Frameworks - Uses a schema-first execution pipeline that validates incoming queries against a strongly typed schema before resolution.
- Web Framework Integrations - Offers adapters and middleware to integrate GraphQL server logic into various Node.js web frameworks and serverless environments.
- GraphQL Result Caches - Implements query result storage based on cache-control hints to reduce redundant computation.
- GraphQL Integrated Development Environments - Ships a built-in interactive browser-based explorer for developing and testing GraphQL operations directly at the server endpoint.
- Automated Schema Synchronization - Includes a schema registry client that automates the synchronization of API definitions with a central registry.
- GraphQL Performance Optimizers - Reduces response times and server load through response caching and parsed document storage.
- Schema Registry Management - Manages API definitions through a registry client and provides interactive sandboxes for testing.
- Lifecycle Plugin Systems - Implements a plugin system that hooks into request lifecycle stages to modify execution behavior or inject context.
- Document Syntax Caches - Stores previously validated syntax trees in memory to skip the parsing and validation phases for repeat operations.
- Interactive Explorers - Provides a built-in interactive API sandbox for testing operations and validating schemas directly at the server endpoint.
- Middleware Frameworks - Wraps GraphQL execution logic as pluggable middleware to function within Node.js web server frameworks.
- Request Lifecycle Hooks - Provides extensibility to intercept and modify GraphQL request processing at specific stages like resolution or error handling.
- JavaScript Implementations - Spec-compliant and production ready JavaScript GraphQL server.
- Web Framework Integrations - GraphQL server implementation for API development.
