{
  "schema": "4xciv-agents/1",
  "name": "4XCiv",
  "description": "Real-physics solar-system civilization sim led by agentic AI officers.",
  "url": "https://4xciv.com/",
  "canonical": "https://4xciv.com/",
  "publisher": "Million on Mars",
  "updated": "2026-10-04",
  "docs": "https://4xciv.com/agents.html",
  "contact": {
    "access_requests": "mailto:crew@4xciv.com"
  },
  "products": [
    {
      "id": "explore",
      "name": "4XCiv Explore",
      "page": "https://4xciv.com/explore.html",
      "app": "https://explore.4xciv.com",
      "access": "public",
      "description": "Public, no login. The whole solar system in your browser, from the orbit of Pluto down to the surfaces of planets, moons and asteroids. Real orbits, real imagery, real light: 37 tracked bodies rendered from real mission data, Lagrange points and barycenters, eclipses and shadows, and surface descents at Apollo 15 Hadley, Jezero Delta and Mount Everest."
    },
    {
      "id": "play",
      "name": "4XCiv Play",
      "page": "https://4xciv.com/play.html",
      "app": "https://play.4xciv.com",
      "access": "crew",
      "description": "Crew access (in crew testing). The 4X game on top of the real solar system: survey a hex plot on Mars, build a colony, craft from a 173-item catalog in 15 categories, design ships that have to shed their own heat, fly real transfer windows, and fight in the real system under real gravity. Agentic AI officers are locked in the canon and partly in development."
    },
    {
      "id": "canon",
      "name": "The Canon",
      "page": "https://4xciv.com/canon.html",
      "app": "https://canon.4xciv.com",
      "access": "crew",
      "description": "The design doctrine and the world: a founding thesis, eleven locked design pillars, and about 1.17 million words across 246 indexed files, searchable through the Bibliotheca and Ask the Magistra. Excerpts are public on this site; the full corpus is behind the crew door."
    },
    {
      "id": "devlog",
      "name": "Devlog",
      "page": "https://4xciv.com/devlog.html",
      "access": "public",
      "description": "Week by week from the team channel: what shipped, what broke, and what it cost. Drafted from the record, reviewed by the people who built it. Paired with What's New, the changelog of features, art and fixes across Explore and Play."
    }
  ],
  "resources": [
    {
      "id": "llms",
      "url": "https://4xciv.com/llms.txt",
      "type": "text/plain",
      "status": "live",
      "auth": "none",
      "description": "Overview for language models (llmstxt.org)."
    },
    {
      "id": "llms-full",
      "url": "https://4xciv.com/llms-full.txt",
      "type": "text/plain",
      "status": "live",
      "auth": "none",
      "description": "Full text of every devlog post and What's New entry."
    },
    {
      "id": "whats-new",
      "url": "https://4xciv.com/whats-new.json",
      "type": "application/json",
      "status": "live",
      "auth": "none",
      "description": "What's New entries and devlog posts as JSON (version 1)."
    },
    {
      "id": "feed",
      "url": "https://4xciv.com/feed.xml",
      "type": "application/atom+xml",
      "status": "live",
      "auth": "none",
      "description": "Atom feed of devlog posts and What's New entries."
    },
    {
      "id": "sitemap",
      "url": "https://4xciv.com/sitemap.xml",
      "type": "application/xml",
      "status": "live",
      "auth": "none",
      "description": "Every page, post and entry with lastmod."
    },
    {
      "id": "robots",
      "url": "https://4xciv.com/robots.txt",
      "type": "text/plain",
      "status": "live",
      "auth": "none",
      "description": "Crawler policy."
    }
  ],
  "capabilities": [
    {
      "id": "mcp-explore",
      "type": "mcp",
      "name": "Explore MCP server",
      "description": "Explore's ephemeris and body data as read-only tools: bodies, positions, data coverage and transfer windows. Public, no login, like Explore itself.",
      "auth": "none (planned)",
      "status": "planned",
      "endpoint": null
    },
    {
      "id": "mcp-play",
      "type": "mcp",
      "name": "Play MCP server",
      "description": "Play's sim actions as authenticated tools, scoped to a player's own colony, under the same rules as people.",
      "auth": "Bike4Mind account (planned)",
      "status": "planned",
      "endpoint": null
    },
    {
      "id": "openapi",
      "type": "openapi",
      "name": "OpenAPI",
      "description": "The same body, ephemeris and transfer-planning endpoints as a documented REST API.",
      "auth": "none for Explore data (planned)",
      "status": "planned",
      "endpoint": null
    }
  ],
  "notes": "Only resources with status \"live\" exist today. Planned capabilities have no endpoint yet; see the docs page."
}