# Apollo Kotlin

> Guide for building applications with Apollo Kotlin, the GraphQL client library for Android and Kotlin. Use this skill when: (1) setting up Apollo Kotlin in a Gradle project for Android, Kotlin/JVM, or KMP, (2) configuring schema download and codegen for GraphQL services, (3) configuring an `ApolloClient` with auth, interceptors, and caching, (4) writing queries, mutations, or subscriptions,

- Skill: `om-scogo/apollo-kotlin` (Agent Skill, multi-file: 4 files)
- Install (CLI): `npx skillmds add om-scogo/apollo-kotlin`
- Raw SKILL.md: https://api.skillmd.com/api/skills/om-scogo/apollo-kotlin/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- License: MIT
- Author: om-scogo (https://skillmd.com/u/om-scogo)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/om-scogo/apollo-kotlin

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# Apollo Kotlin Guide

Apollo Kotlin is a strongly typed GraphQL client that generates Kotlin models from your GraphQL operations and schema, that can be used in Android, JVM, and Kotlin Multiplatform projects.

## Process

Follow this process when adding or working with Apollo Kotlin:

- [ ] Confirm target platforms (Android, JVM, KMP), GraphQL endpoint(s), and how schemas are sourced.
- [ ] Configure Gradle and code generation, including custom scalars
- [ ] Create a shared `ApolloClient` with auth, logging, and caching.
- [ ] Implement operations.
- [ ] Validate behavior with tests and error handling.


## Reference Files

- [Setup](references/setup.md) - Gradle plugin, schema download, codegen config (including scalars), client configuration (auth, logging, interceptors)
- [Operations](references/operations.md) - Queries, mutations, subscriptions, and how to execute them
- [Caching](references/caching.md) - Setup and use the normalized cache
- [Migration Guide](references/migrating-from-4.md) - Migrate from Apollo Kotlin 4

## Scripts

- [list-apollo-kotlin-versions.sh](scripts/list-apollo-kotlin-versions.sh) - List versions of Apollo Kotlin
- [list-apollo-kotlin-normalized-cache-versions.sh](scripts/list-apollo-kotlin-normalized-cache-versions.sh) - List versions of the Apollo Kotlin Normalized Cache library

## Key Rules

- Prefer Apollo Kotlin v5+. Do not use v3 or older versions.
- Keep schema and operations in source control to make builds reproducible.