JordiParraCrespo/typesafe-ai-trading-showcase
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CommunityJev Demos & Experiments
TypeSafe AI Trading Showcase
A read-only market demo that pulls Coinbase trades for BTC, ETH and XRP, folds the last 60 seconds into up to twelve five-second OHLC samples, and asks one shared Jev request for a buy/wait call per coin.
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- 0
- Language
- TypeScript
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- JordiParraCrespo
- Last verified
- Oct 2026
About this project
Live BTC, ETH, and XRP prices with a shared TypeSafe buy/wait demonstration. No trades are placed. Not financial advice. Open All API credentials remain server-side. Prices refresh approximately every 15 seconds. Each coin's last 60 seconds of actual Coinbase trades are aggregated into up to 12 five-second OHLC/volume samples. The AI considers a hypothetical entry for the next 60 seconds. It does not predict returns.
Quoted from the project's README. Read the full README.
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Used inJev for Software & DevTools
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- TypeScript
Highlights
- Each coin's last 60 seconds of Coinbase trades become up to 12 five-second OHLC/volume samples for a hypothetical 60-second entry.
- One inference request covers all available coins, at most once per 60 seconds per warm instance. Polled data, not streaming execution.
- If the trades page is stale or leaves too few populated buckets, the app withholds that coin's signal instead of fabricating samples.
- The per-card JSON toggle shows fetched results, analysis samples, timestamps, confidence and the shared request token count. No extra calls.
Watch out
No trades are placed and the README says so up front. Without Upstash Redis, each warm Vercel instance keeps its own in-memory cache, so separate instances can each spend tokens and there is no global token or spending budget. The Redis coordination path is documented but the README states the credentials have not been configured or live-verified, and that distributed behaviour is covered only by mocked concurrency and failure tests; when Redis is configured but unavailable the server fails closed. Caching reduces duplicate usage but cannot stop cost, and pause only stops the browser that pressed it. A note for anyone publishing: the coin logos are CC0, but the README flags that the Family brand font licence still needs confirming. Copy reviewed against the repository README on 2026-10-04, not from running it.
Questions about this entry
Short answers drawn from the linked project or page.
Read-only. No trades are placed, and the README states it is not financial advice. The model weighs a hypothetical entry for the next 60 seconds from recent trade samples and explicitly does not predict returns, so the output is a demonstration signal rather than an order pipeline.
The app withholds that coin's signal. The trades endpoint returns the latest 1,000 trades; if that page does not cover the analysis window, looks stale, or has too few populated five-second buckets, no AI call is made for that coin. The README is explicit that it does not fabricate samples to fill the gap.
It can. Prices and samples are cached in server memory for 12 seconds and AI responses are reused between attempts at least 60 seconds apart, and concurrent requests on one instance share a single in-flight refresh, but separate instances have separate caches and may each spend tokens. Optional Upstash Redis adds a shared lease and a 60-second inference cooldown across instances, though the README notes that path is not yet live-verified.
No database is required. Memory cache resets whenever an instance restarts, and the CDN also caches successful API responses for 12 seconds. Toggling a card's JSON view only renders results already fetched, so it makes no network requests and consumes no additional tokens. Tests mock the providers, so they do not spend TypeSafe tokens either.
It needs Node.js 22.6 or newer (24 recommended); npm install, set TYPESAFE_API_KEY in .env and npm start, then open localhost:3000, with all API credentials staying server-side.
Prices refresh about every 15 seconds and each coin's last 60 seconds of real Coinbase trades become up to 12 five-second OHLC and volume samples for a hypothetical next-60-second entry; one inference request covers all coins at most once per 60 seconds per warm instance.
The server fails closed; with no Redis credentials it uses per-instance memory instead, and the README notes the Redis path has not been configured or live-verified, with distributed behavior covered only by mocked concurrency and failure tests.
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