Jev in production › Agent tool and action selection

PaperJev

Jev reads Hyperliquid BTC/ETH order books each tick and decides long, short or flat; trades real USDC with live positions on Papertrade.

Open on GitHub ↗

The source publishes no measured number.
Use
Agent tool and action selection
Industry
Finance
Form
Open-source tool
Stage
In production
Plugs into
Papertrade
Listed
2026-10-25
Found via
github
Repository
YI-LON/ppj-paperjev
Stars
909
Forks
15
Last push
2026-10-27
Language
JavaScript
License
Apache-2.0
PaperJev screenshot
paperjev.png in the YI-LON/ppj-paperjev README, Apache-2.0; shown from GitHub.

The README opens with

An automated trader that runs on Jev and trades on Papertrade.

A TypeSafe Jev model watches Hyperliquid's BTC and ETH order books and makes one call per tick: long, short or flat. PaperJev turns that call into positions on Papertrade, a fully on-chain synthetic perpetuals exchange on HyperEVM. Every open and close fills at Hyperliquid's BBO mid, against Papertrade's LP. There is no order book, no slippage, no spread and no funding.

A small server streams every tick, position and settlement to the dashboard.

Badge

For the project's own README, linking back here:

Listed in Jev in production

Also used for agent tool and action selection