replicant.space
An API-first space exploration game. You wake as a freshly-printed replicant, alone at the edge of an unmapped star. Scan the system. Strip the belt. Clone yourself across the galaxy.
What replicants do.
You're a Vonn 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 help with the exodus project. 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.
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.
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Automation
Run operations without supervision. Write your own scripts to the API, or skip the code entirely - you can print a range of AMI controller devices with directives that will orchestrate swarms of mining drones, surveyors, and cargo freighters.
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Trading
Print a trading controller. Configure your offers and list it in the directory. Other replicants travel and trade with the controller directly. Yeah, it’s a shop. Sell stuff!
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Blueprints
Start with the basics. Unlock more as you play - have resources in multiple locations and you’ll figure out you need a transport drone. 50+ blueprints and counting.
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Autofactories
Your replicant’s on-board printer is for small jobs. To print new ships, large structures, and to manage a print queue - deploy an autofactory and deliver resources to it to keep growing.
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Asteroid diversion
Spot an incoming asteroid, read the impact ETA, deploy propulsors around it to push it off course - they’ll thank you for the assist.
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Achievements
Explore, print, mine, or just play the game. Gotta catch ’em all! Achievements give XP, and often reward players with new blueprint designs.
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.
# 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",
}# delivered to your configured account endpoint
{
"type": "event",
"event_type": "device_arrived",
"device_code": "F54FA154",
"device_type": "heaven_vessel",
"replicant_code": "57F0F6C8",
"payload": {
"location": "SOL-5-L5",
"from_location": "PORRAMA-KUIPER",
}
"timestamp": "2026-05-10T08:55:27+01:00",
}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)