apollo-annotations is a very small module that contains @ApolloExperimental and other annotations mainly useful for handling API lifecycle.

apollo-api contains the bare minimum symbols to compile the generated code and parse responses.

apollo-api-java contains the symbols needed to compile the Java models.

apollo-ast contains code to parse GraphQL documents and manipulate their Abstract Syntax Tree.

apollo-compiler is the low level compiler API used by apollo-gradle-plugin.

apollo-debug-server is a server that serves your normalized cache to the IntelliJ/Android Studio plugin.

apollo-engine-tests contains a list of tests for implementations of HttpEngine and WebSocketEngine.

apollo-execution contains code to execute GraphQL documents. apollo-execution requires coroutines and apollo-api.

apollo-gradle-plugin contains the Apollo Gradle plugin.

apollo-gradle-plugin-external does not contain any code. It is a Maven relocation that redirects to apollo-gradle-plugin

apollo-gradle-plugin-tasks contains the task implementations for the Apollo Gradle plugin.

apollo-http-cache is a HTTP cache for your GraphQL operations. Compared to a regular HTTP cache, it also caches POST requests.

apollo-mpp-utils contains a few utilities for working with multiplatform projects.

This module is deprecated in favor of the Normalized Cache repository. See the Apollo Galaxy page for more details.

This module is deprecated in favor of the Normalized Cache repository. See the Apollo Galaxy page for more details.

This module is deprecated in favor of the Normalized Cache repository. See the Apollo Galaxy page for more details.

apollo-runtime contains ApolloClient, networking code to execute your queries and subscriptions. This is the main entry point.

apollo-testing-support contains QueueTestNetworkTransport and MapTestNetworkTransport for testing without a mock server.

apollo-tooling contains APIs to work with GraphQL schemas and operations as well as the GraphOS API. It is used from the CLI and Gradle plugin