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Developer documentation

Local prototype · public hosting and real-money services are not available.

Create a project, upload a bundled browser game, test its private preview and submit the exact build for review. Local services provide game-scoped identity, bounded JSON storage, unverified score review and clearly labelled TEST payments. Google is configured locally. The reference game exercises identity, entry confirmation and score submission. Real-money services remain disabled.

Current integration

  1. Read SDK and managed storage for the save contract and limits.
  2. Use the API reference for implemented routes and errors.
  3. Create a game at Create → Your games, download its credentials and copy the setup prompt. The prompt uses the current local SDK bundle, including agent and security guidance.

The SDK download is available in each project’s Setup tab. The public GitHub repository may lag the local implementation.

Keep private credentials out of browser builds. Do not broaden the game allowlist or share Spawn account cookies to make an unsupported integration work. Browser scores are untrusted data, not permission to distribute rewards.

For the product direction, see the Whitepaper.