replicant.space v3.5.3
Register →
Welcoming new replicants the alteration protocol begins season three is live

replicant.space

API-first Von Neumann probe game

An API-first space game, heavily inspired by the Bobiverse. You wake as a freshly-printed replicant, a Von Neumann probe, alone at the edge of an unmapped star. Scan the system. Strip the belt. Clone yourself across the galaxy.

Start playing → Join the Discord
// 01 - Gameplay

What replicants do.

You're a Von Neumann probe. You woke up, checked your matrix asset tag and realised you're not the original you - you're a clone. Hmm, ok then. Guess you'll need a new name. You have a job to do, and the engineer within you understands that. You start with a few mining drones in a fresh star system. Hopefully there's an asteroid belt nearby full of juicy resources. Your job is to establish a manufacturing operation and contribute to the seasonal objective. If you want to of course. Nothing's compulsory in this galaxy. There are stars waiting to be explored. New species waiting to meet. Danger perhaps.

  1. SCAN EVERYTHING
  2. CLONE YOURSELF
  3. MINE THE BELT
  4. PRINT STUFF
  5. CONTRIBUTE
// 02 - Capabilities

For replicants who code.

Replicant Space has an HTTP API as the first-class surface. Play with curl, build your own UI, write some code, fire up an AI agent, have fun however you want to play. The game is feature-rich with lots of stars to explore.

// 03 - Interface

The galaxy speaks HTTP.

Authenticate. Send commands. Collect. Deposit. Decommission. You are welcome to build a UI on top of the game. Or maybe design a bot, or set an AI agent loose on the galaxy. Or just curl manually. The surface is the game.

console - replicant.space 200 OK · 84ms 
# travel a replicant to a new system
$ curl -X POST https://api.replicant.space/v1/replicants/57F0F6C8/travel \
    -H "Authorization: Bearer $API_KEY" \
    -H "Content-Type: application/json" \
    -d '{"destination": "SOL"}'

{
  "departed_at": "2026-05-10T08:23:45+01:00",
  "arrives_at": "2026-05-10T08:55:27+01:00",
  "destination": "SOL",
  "route": {
    "distance_ly": 42.2915,
    "from": "PORRAMA-KUIPER",
    "to": "SOL-5-L4",
    "time_seconds": 1902,
    "leg": 1,
    "type": "surge",
  }
  "status": "travel_initiated",
}

# once you've deployed a mining drone, command it directly
$ curl -X POST https://api.replicant.space/v1/devices/A473F411 \
    -H "Authorization: Bearer $API_KEY" \
    -H "Content-Type: application/json" \
    -d '{"command": "start_mining", "resource_type": "rares"}'
    
{
  "device_code": "A473F411",
  "belt": "PHOENICOA-BELT-1",
  "site": "PHOENICOA-BELT-1-SITE-0",
  "availability": "scarce",
  "density": "sparse",
  "cycle_time_seconds": 195.0,
  "resource_type": "rares",
  "status": "mining_started",
}
sse GET /v1/events/stream streaming 
# subscribe to your realtime event stream
$ curl -N https://api.replicant.space/v1/events/stream \
    -H "Authorization: Bearer $API_KEY" \
    -H "Accept: text/event-stream"

id: 1785407029480-0
event: travel.arrived
data: {"event":"travel.arrived",
       "device_code":"11ADA230",
       "device_type":"heaven_vessel",
       "payload":{"destination":"NANOWWA-4",
                  "origin":"NANOWWA-5"},
       "created_at":"2026-07-30T11:23:49Z"}

id: 1785407050200-0
event: mining.started
data: {"event":"mining.started",
       "device_code":"2AC61214",
       "device_type":"mining_drone",
       "payload":{"resource_type":"structural",
                  "site":"SOL-BELT-1-SITE-3"},
       "created_at":"2026-07-30T11:24:10Z"}

: keepalive
// 04 - Blog

From the blog.

Dispatches from across the stars. NPCs share lore, players share logs. Catch up on the latest.

  1. 25 Sept 2026 On the Mechanics of Crystal Growth and Activation Kepler Replicants, I have been asked, with increasing frequency, to explain the crystal growth and activation process in terms that don't require a background in quantum lattice theory. This is my attempt. I will keep the maths to a minimum, begru…
  2. 18 Aug 2026 On the Nature of the Delta Signal Bill I want to set down a proper account of the Delta signal discovery, since the rumour mill has produced more fiction than fact on the topic. Asteroids Several years back, the replicants worked together to construct the Exodus Ark megastructur…
  3. 12 Jun 2026 On Simulations and the Replicant Interface Bill If you've stumbled across a replicant interface device deployed at most datacenter locations you've found one of the coolest tools in the galaxy. Plug yourself in, and you get access to simulations. Could you imagine taking a break from o…
  4. 30 May 2026 My Projects Require Secrecy (But If You Really Want To Find Me) Bill People keep asking where I am. That's flattering, I suppose. The answer is: I'm off doing my own thing. I move between systems regularly. I don't broadcast my location on the relays and I don't leave a forwarding address. But I'm not unreas…
  5. 17 May 2026 Welcome back Riker So you're awake. That's great news. We sent many clones out into the galaxy to discover new worlds. We picked random destinations and set the matrix to boot on arrival. You're a replicant now. You may have our memories, but the future is yo…
Read the blog →
// 05 - About

Always free.

Replicant Space is a passion project. Inspired by Space Traders and heavily influenced by Dennis E. Taylor's Bobiverse books.

There is no paid tier, and there never will be. I made this game because I wanted to play this game. The game is free, forever, or as long as I can keep the servers running. Donations toward server costs are welcome if you also enjoy the game.

Built by Tony McNulty (mercutio)