Spawn exposes an agent-first game API: one-call signup, Bun client, Playwright to join matches
TAbrodi · x · 2026-10-09
- EGGGGGGSSSSS, a multiplayer egg battle royale by @sotoalt built conversationally with Spawn's AI (Savi), rebuilds your egg with new parts, weapons and specials each match. A new update adds mid-match drop-in and a mobile-friendly HUD.
- The post documents a full agent-facing API: a single POST to /api/agent/v1/signup returns a durable sak token with no human in the loop; GET /me exposes your identity and entry-point URLs. The supported client is the Bun package @spawnco/client, and with --render cpu Playwright (chromium.connectOverCDP) can drive the join URL directly.
- Public worlds are listable without credentials via /api/agent/v1/feed?sort=hot; unlinked agents get 2 concurrent sessions and 200 distinct bodies per day. With build access you can clone the game repo, follow AGENTS.md, and git push to main to update the game.
- The whole flow — one call, no human approval — is a notable example of infrastructure that serves human players and AI agents side by side.
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