How do I install the Setup Apple Signin skill?

Run npx skillmds@latest add rockclaver/setup-apple-signin in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

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Which AI agents work with Setup Apple Signin?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Setup Apple Signin free to use?

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Who published Setup Apple Signin?

rockclaver (@rockclaver) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Setup Apple Signin by rockclaver — Agent Skill

Name: Setup Apple Signin
Author: rockclaver

Setup Apple Signin

Set up Sign In with Apple in a Flutter + Firebase app — Developer Portal App ID/Services ID/key, Firebase config, Dart code for iOS-native and Android/web. Use when adding Apple login or fixing operation-not-allowed/invalid_client.

rockclaver Updated Sep 17, 2026

File contents

Setup Apple Sign-In (Flutter + Firebase)

Wire up Sign In with Apple across iOS, Android, and web through Firebase Auth. Three systems must agree: Apple Developer Portal, Firebase Console, and app code.

Quick start (iOS-only apps)

pubspec.yaml: firebase_auth is sufficient — no extra package needed.

Future<UserCredential> signInWithApple() =>
    FirebaseAuth.instance.signInWithProvider(
      AppleAuthProvider()..addScope('email')..addScope('name'),
    );

On iOS/macOS this presents Apple's native sheet. Enable the Apple provider in Firebase Console → Authentication → Sign-in method → Apple → Save. That's the entire setup for iOS-only.

Setup checklist (add Android/web/desktop)

Apple has no native SDK outside iOS/macOS — signInWithProvider falls back to a web redirect through https://<project>.firebaseapp.com/__/auth/handler, which needs real OAuth registration:

Xcode: add "Sign In with Apple" capability → writes com.apple.developer.applesignin to Runner.entitlements. Auto-registers the App ID capability in the Developer Portal on next archive with automatic signing.
Apple Developer Portal → Keys: create a key with Sign In with Apple enabled, Primary App ID = your bundle ID. Download the .p8 once; note the Key ID.
Apple Developer Portal → Identifiers → Services IDs: create one (e.g. com.you.app.web, must differ from the bundle ID). Enable Sign In with Apple → Configure → Primary App ID, Domain = <project>.firebaseapp.com, Return URL = https://<project>.firebaseapp.com/__/auth/handler. Save all three dialogs.
Firebase Console → Apple provider → OAuth code flow configuration: Services ID, Team ID, Key ID, full .p8 contents. Save (server-side, no rebuild).
Android: register the app's SHA-1/SHA-256 in Firebase Project Settings so the redirect handler returns correctly.

Full step-by-step with exact field values: REFERENCE.md.

Code

Native sign-in, linking, unlinking, and the sign_in_with_apple package alternative (for a HIG-compliant native button): EXAMPLES.md.

Something's broken

operation-not-allowed vs invalid_client, the platform routing trap, and a one-request bisection test that pinpoints Services ID vs key misconfiguration in seconds: TROUBLESHOOTING.md.

---name: setup-apple-signindescription: Set up Sign In with Apple in a Flutter + Firebase app — Developer Portal App ID/Services ID/key, Firebase config, Dart code for iOS-native and Android/web. Use when adding Apple login or fixing operation-not-allowed/invalid_client.---# Setup Apple Sign-In (Flutter + Firebase)Wire up Sign In with Apple across iOS, Android, and web through Firebase Auth. Three systems must agree: Apple Developer Portal, Firebase Console, and app code.## Quick start (iOS-only apps)`pubspec.yaml`: `firebase_auth` is sufficient — no extra package needed.```dartFuture<UserCredential> signInWithApple() => FirebaseAuth.instance.signInWithProvider( AppleAuthProvider()..addScope('email')..addScope('name'), );```On iOS/macOS this presents Apple's **native** sheet. Enable the **Apple** provider in Firebase Console → Authentication → Sign-in method → Apple → Save. That's the entire setup for iOS-only.## Setup checklist (add Android/web/desktop)Apple has no native SDK outside iOS/macOS — `signInWithProvider` falls back to a **web redirect** through `https://<project>.firebaseapp.com/__/auth/handler`, which needs real OAuth registration:1. **Xcode**: add "Sign In with Apple" capability → writes `com.apple.developer.applesignin` to `Runner.entitlements`. Auto-registers the App ID capability in the Developer Portal on next archive with automatic signing.2. **Apple Developer Portal → Keys**: create a key with Sign In with Apple enabled, Primary App ID = your bundle ID. Download the `.p8` **once**; note the Key ID.3. **Apple Developer Portal → Identifiers → Services IDs**: create one (e.g. `com.you.app.web`, must differ from the bundle ID). Enable Sign In with Apple → Configure → Primary App ID, Domain = `<project>.firebaseapp.com`, Return URL = `https://<project>.firebaseapp.com/__/auth/handler`. Save all three dialogs.4. **Firebase Console → Apple provider → OAuth code flow configuration**: Services ID, Team ID, Key ID, full `.p8` contents. Save (server-side, no rebuild).5. **Android**: register the app's SHA-1/SHA-256 in Firebase Project Settings so the redirect handler returns correctly.Full step-by-step with exact field values: [REFERENCE.md](REFERENCE.md).## CodeNative sign-in, linking, unlinking, and the `sign_in_with_apple` package alternative (for a HIG-compliant native button): [EXAMPLES.md](EXAMPLES.md).## Something's broken`operation-not-allowed` vs `invalid_client`, the platform routing trap, and a one-request bisection test that pinpoints Services ID vs key misconfiguration in seconds: [TROUBLESHOOTING.md](TROUBLESHOOTING.md).

Frequently asked questions