Infinite Swap
Trade a bottle cap up to a house
Details
- External ID
- 48160967
- Source
- HN
- Company
- —
- Product
- Infinite Swap
- Website domain
- infiniteswap.app
- Launched
- May 16, 2026
- Cohort
- —
- Upvotes
- 8
- Upvotes percentile
- 0.4894991922455573
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Description
Hey HN,Infinite Swap is a game inspired by Kyle MacDonald’s One Red Paperclip and other bigger-and-better swap stories - you start with a green bottle cap and trade it with other characters in various locations all the way up to a house and beyond.A while ago I got inspired by viral games Infinite Craft and What Beats Rock? and wanted to make my own ‘exploring a LLM’s latent space’ style challenge. After much experimentation this became a trading style game, where the LLM comes up with all the items, trading scenarios and value estimates, which ended up being surprisingly fun and somewhat of a roller coaster to play.I found it was the most intriguing if I separated the item offer from its valuation - so I implemented a pricing oracle called “Sal” who gives this info with his, sometimes snarky, opinion after each trade.The item offer mechanism goes deeper too - each character’s profile is combined with a set of hidden motivations. I then use embeddings and cosine similarity to represent the desire the character has for the player's item, and therefore what they are willing to offer in exchange.Links to play: iOS (small number of ads, polished): https://apps.apple.com/us/app/infinite-swap/id6761694545 Android (small number of ads, polished): https://play.google.com/store/apps/details?id=com.squizsoftw... Web (no ads, a touch rougher than the mobile versions but still very functional): https://infiniteswap.appStack: GPT-4.1-mini for item generation, SDXL Lightning for item images, Kokoro for voices (the latter two running on my 4090 at home). Postgres + FastAPI on k3s for the backend, native Swift/Kotlin for mobile, React for web.Keen for any feedback, bug reports, improvement suggestions, etc. I’ll be around for a few hours if you have any questions.Daniel
Enrichment
- Theme
- indie hacker passion projects
- Vertical
- Retail & commerce
- Function
- Marketplace
- Audience
- B2C
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- trading game from bottle caps to houses
- Manually corrected
- False
Could you build this?
Yes A casual text-and-image trading game where LLM prompts generate progressive trade scenarios, character reactions, and state progression.
Discussion
5 comments analyzed.
Concerns raised: API costs for LLM inference, Mobile web app can't display full item names, Difficulty distinguishing replicas from authentic items
Feature requests: Add ads to web version, Restyle mobile web components for better item name visibility
Competitors
Other products that read as similar to this one — 61 launches clear the similarity bar, closest 8 shown.
Attention rank: #37 of 62 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 199 days after the earliest competitor.
- Dealta · hn · 2026-01-02 · 56 upvotes · similarity 0.43
- I wrapped the Zorks with an LLM · hn · 2026-01-27 · 111 upvotes · similarity 0.39
- I made a retro falling block puzzle, with a twist ;) · hn · 2026-09-06 · 6 upvotes · similarity 0.39
- Skyline Co-op is like SimTower, but built around democratic socialism · hn · 2026-08-06 · 41 upvotes · similarity 0.37
- Airport Swap · hn · 2026-03-16 · 6 upvotes · similarity 0.37
- Jev Plays Pokémon Red · hn · 2026-09-25 · 280 upvotes · similarity 0.37
- Wageslave · hn · 2026-03-31 · 16 upvotes · similarity 0.37
- Quick games disguised as boring spreadsheets · hn · 2026-06-08 · 22 upvotes · similarity 0.37
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a marketplace tool for Horizontal yet.