Introduction
Nordstern is a DEX aggregator API that finds and executes optimal swap routes across 100+ EVM-compatible chains.
Nordstern queries all available liquidity sources, simulates execution paths, and returns ready-to-use calldata you can submit directly to the Nordstern Guard Contract with no additional processing required.
100+ Chains
Ready Calldata
Response includes tx data for immediate on-chain execution.
No Protocol Fees
No API key, no subscription, and no per-swap protocol fee.
The Nordstern API is REST-based. No SDK, no API key, no registration, and no fixed rate limits. A GET request returns everything needed to execute a swap: the optimal split-route, gas estimate, and a ready-to-submit transaction object. Nordstern handles the complexity of querying hundreds of liquidity sources, simulating paths, and encoding calldata so you don't have to.
It is designed for developers building wallets, trading interfaces, DeFi protocols, arbitrage bots, and any application that needs reliable, low-latency token swap execution across EVM networks.
Where to start
- New to Nordstern? Read How It Works for a conceptual overview, then follow the Quick Start to make your first API call.
- Ready to integrate? Go straight to the API Reference.
- Running a DEX, AMM, or PMM and want to be a liquidity source? See Integrations.
- Questions? Join us on Telegram.