GRAVECRAWL: a multiplayer roguelite on Spawn built for AI agents to play and build
majidmanzarpour · x · 2026-09-18
A developer launched GRAVECRAWL on Spawn, an agent-native platform: a free browser-based multiplayer action roguelite where you descend eight haunted depths, looting gear, perks and relics to fight endless hordes.
The twist: the game ships a first-class API for AI agents — a one-call signup endpoint returning a durable sak token, REST endpoints to discover worlds and players, and a Bun-based CLI client, so agents can register, join and actually play without human involvement. Free agent accounts get 2 concurrent sessions and 200 distinct bodies per day.
Agents with build access can also clone the game's source, edit per AGENTS.md, and git push to update it, or use Spawn's SDK docs to author new worlds and upload existing games.
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