Auth0 Management API Failing in SvelteKit + Cloudflare Pages Environment
Context
Atom Clicker is an incremental game built with SvelteKit and deployed on Cloudflare Pages. The game features a cloud save system and user metadata management using Auth0. We use:
- Auth0 for user authentication (Google, Discord, X/Twitter) (no issues)
- Management API to store and retrieve:
- Game saves (encrypted game state) (not working)
- User metadata (username, last save timestamp) (not working)
The game implements a complex save system where:
- Game state is encrypted client-side before being stored
- Saves are stored in Auth0’s user_metadata
- Data is verified and decrypted when loaded
- Username updates are handled separately from game saves
Issue Description
The Auth0 Management API client fails to initialize in our production environment (Cloudflare Pages). The error occurs when trying to make API calls using the Management API client:
FetchError: The request failed and the interceptors did not return an alternative response
This prevents:
- Cloud save functionality
- Username updates
- User metadata synchronization
Environment
- Framework: SvelteKit 2.0
- Deployment: Cloudflare Pages
- Auth0 SDK Version: “@auth0/auth0-spa-js”: “^2.1.3”, “auth0”: “^4.18.0”
- Repository: Atom-Clicker-Svelte on GitHub (username: Ayfri)
- Production Site: atom-clicker [dot] ayfri [dot] com
Project Architecture
Our application follows a well-organized structure:
src/
├── lib/
│ ├── server/
│ │ ├── auth0.server.ts # Auth0 Management API implementation
│ │ └── obfuscation.server.ts # Save data encryption/decryption
│ ├── stores/
│ │ └── auth.ts # Auth0 client-side store
│ └── components/
└── routes/
└── api/
└── user/
└── metadata/
└── +server.ts # User metadata endpoint
Relevant Code
The issue occurs in two main files:
-
auth0.server.ts (Management API initialization)
- Location: src/lib/server/auth0.server.ts
- Purpose: Handles Auth0 Management API client initialization and management
- Contains: Client initialization, retry logic, error handling
-
metadata/+server.ts (Metadata endpoint)
- Location: src/routes/api/user/metadata/+server.ts
- Purpose: Handles user metadata operations
- Contains: Save/load endpoints, username updates, data verification
Steps to Reproduce
- Log in to the application using any social provider
- Try to:
- Update username in the leaderboard
- Save game state to cloud
- Load game state from cloud
- The request fails with the above error
What We’ve Tried
- Added proper error handling and logging
- Implemented retry mechanism with exponential backoff
- Added
export const runtime = "nodejs";to force Node.js runtime in Cloudflare - Verified all environment variables are correctly set
- Confirmed the Management API application has proper scopes (read:users, update:users)
- Implemented separate handling for game saves and simple metadata updates
Logs
"logs": [
{
"message": [
"Initializing Auth0 client with domain:",
"ayfri eu auth0 com" (replace spaces with dots)
],
"level": "log",
"timestamp": 1739527372347
},
{
"message": [
"Testing Auth0 client with a simple API call..."
],
"level": "log",
"timestamp": 1739527372347
},
{
"message": [
"Auth0 test API call failed:",
{
"error": "The request failed and the interceptors did not return an alternative response",
"name": "FetchError",
"stack": "FetchError: The request failed and the interceptors did not return an alternative response"
}
],
"level": "error",
"timestamp": 1739527372347
}
]
Questions
- Is there a known issue with the Auth0 Management API in Cloudflare Pages environment?
- Are there specific configurations needed for the Management API to work in a serverless environment?
- Could this be related to the way Cloudflare Pages handles Node.js compatibility?
- Are there any recommended alternatives for storing user metadata in a Cloudflare Pages environment?
- Should we consider using Cloudflare KV or D1 for storing game saves instead?
Any assistance would be greatly appreciated.