# Parcl V4

> Parcl V4 appchain documentation

## Docs

- [Quickstart](/quickstart): Get trading in under 5 minutes. You'll need an Ed25519 keypair and some test USDC.
- [Markets](/trading/markets): Parcl V4 trades perpetual futures on real estate price indices. Each market tracks a Parcl index that measures residential real estate prices in a specific geography.
- [Signing transactions](/trading/signing): Every transaction on Parcl V4 is signed with Ed25519. The signing flow: build the transaction JSON, serialize it with a nonce and timestamp, sign the bytes, and submit.
- [REST API](/api/rest): Base URL: `https://v4-api.dev.parcllabs.com`
- [WebSocket](/api/websocket): Endpoint: `wss://v4-api.dev.parcllabs.com/v1/ws`