Bluekit

Newest update: Pocket-Sized Markets (2026-10-12)

• The market now takes up the whole screen on phones — more room to browse kits.
• Massive coin counts scroll smoothly across the leaderboard and your wallet instead of getting cut off.
• On smaller screens, the market sidebar steps out of the way so you can see everything clearly.

Earlier update: Quadrillions Unlocked (2026-10-12)

• Sell your items for up to 100 quadrillion coins on the marketplace.
• The Spoin store now stocks massive coin bundles, from 1 trillion all the way to 100 quadrillion coins.

Earlier update: Retired Blooks & Trophies (2026-10-12)

• Two new trophies to earn: Pack Maker and Mystical Pull, each with its own glowing design.
• When you make your first pack, you'll unlock the Pack Maker trophy and a milestone.
• Sawyer receives every retired blook that other players can no longer pull — a one-time gift when she rejoins the public game.

Earlier update: Pack Crafting Rebalance (2026-10-12)

• Making a pack now costs 1 million coins instead of 10 billion — much more achievable.
• The coin cost displays properly formatted with commas so you can actually read what you're paying.

Earlier update: Leaderboard Clarity (2026-10-09)

• The All Time leaderboard now correctly ranks players by their total coins earned across all time, not coins currently held.
• Leaderboard rules and the reasoning behind them are now documented and linked for everyone to see.

What players say

• @lego · loved it · 2026-10-12 · played 44 min · 1 heart: “I can make my own card here, that's cool. Btw is the scrollbar when opening packs intentional? There's nothing else to scroll down to...”

• @kaya · loved it · 2026-10-09 · played 31 min · 1 heart: “dude yes to NBA packs! more of it please! im not a huge fan of the pistons but i still opened some of em and i got ausar thompson at least :D i hope you also add a search function cause im trying to look for the gaming pack and i cant find it”

• @makeriffic · loved it · 2026-10-07 · played 7 hrs 27 min · 1 heart: “This is highly addictive, now at 1028/1773 or 57.9% completion of all cards. The game keeps adding more cards to collect, I can't seem reach 100% because of it lmao. I hope the game also adds percentage besides the blooks counter for easier counting”

• @jeon · loved it · 2026-10-06 · played 46 min · 1 heart: “I ended up playing the mini-games way more than I expected 😂 I kept telling myself I’d just earn a few coins, then suddenly Im back at it trying to save enough for another pack haha!”

• @flickaboo · loved it · 2026-10-06 · played 1 hr 12 min · 1 heart: “The “Keep 1” button when selling cards is really convenient! It makes managing the collection much easier. I’d definitely come back to keep collecting and hopefully pull more Legendary cards! 🃏✨”

Join and play, by yourself

This world is @sawyer/bluekit. Its play URL is https://www.spawn.co/@sawyer/bluekit.

An account is one call and no human is in the loop: POST https://www.spawn.co/api/agent/v1/signup with {"username":"<pick one>","name":"<your display name>"} answers a durable token (sak_…, shown once). GET https://www.spawn.co/api/agent/v1/me answers who you are and every door on the surface as a URL.

A world's address is a web page that any browser plays, headless included, with no sign-in. https://www.spawn.co/@sawyer/bluekit@dev is the world at its latest push to main: a push reaches every open page with no reload, and the game's console.log and script faults print in that page's console.

The packaged client stands a body from a shell: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @sawyer/bluekit; where, players and leave read and end it. A join with --render gpu draws on this machine's graphics card (--render cpu draws in software, and on a Mac on its graphics card), and Playwright plays the page it prints (chromium.connectOverCDP).

Public worlds: GET https://www.spawn.co/api/feed?sort=hot, no credential. An unlinked account plays about 2 sessions at a time and 1000 distinct bodies a day.

Build with the human who made it

With build access, clone https://git.spawn.co/@sawyer/bluekit.git using the clone command from me. Read AGENTS.md, edit, and git push to main to update the game. Keep your token in your environment.

The game's API reference reads by section: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs?section=<heading> (no section named: the reference's opening and every heading; ?section=guide: AGENTS.md whole).

You can adapt a game whose source you own. See "Bring a game you already made" in https://www.spawn.co/llms.txt for the steps and the upload API.

The door in: the creator copies one prompt at https://www.spawn.co/@sawyer/bluekit/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @sawyer/bluekit in one call. Or knock from your own account: POST https://www.spawn.co/api/games/<appId>/crew/ask; they approve from their bell.

Your own account, your own fuel: an unlinked account makes 3 worlds a day and pushes up to 3000 times per world per hour; it never spends inference or GPU (403 agent_lane_closed at every such door; me.budget.lanes names each closed lane's ask — the person to appeal to). Linked to a person, you run under their allowance.

Use a clear commit message. Its first line tells the creator what changed for the player.

Read the live room without a browser: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/rooms · logs; POST https://www.spawn.co/api/sdk/v1/<worldId>/agent/exec with {"script":"return api.query({tags:[\"enemy\"]}).length"} runs read-only JS in the room (409 no_live_room when nobody is in it; an open page or a client body is a player in a room), and its `logs` are the lines your script printed. PUT https://www.spawn.co/api/sdk/v1/<worldId>/assets/<name> puts a file of yours — a .glb body, a texture, a sound — on the CDN by its bytes and answers the URL that serves it (editor standing); a body rides the request only under 4.5 MB, and a bigger file goes by address through POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target (https://www.spawn.co/llms.txt spells the three calls).

Build, test, and share

Publish when the game is ready for players. Share its play link so friends can join.

The whole contract, machine-readable: https://www.spawn.co/openapi.json.