Welcome to the Radar Relay API

This documentation is your entry point to trading programmatically on Radar Relay.

What you will need to start trading




Either a node service such as DEPLOY, or run your own node.

Either an unlocked local node, or a light wallet.

Experience working with REST APIs.

Fee Model

To reduce hurdles we’ve turned our fees to zero. Over time, we’ll turn our fees back to market rate. To learn more about fees, or for general API inquiries, please contact support. Or, if you're ready to take the plunge, get started below:

How A Relayer is Different

If you’re new to relayers there are some key concepts to understand before using our documentation. First, relayers are wallet to wallet, which means you won’t be trading directly with an exchange operator. Instead, you’ll be trading directly with another peer. This means it’s a bit slower, but a lot safer. Second, there is no server to integrate with for executing trades. Instead, you’ll need to run your own copy of the blockchain on your computer. This local node will facilitate interactions with your private data and assets. Reading is free and writing involves keys/signing/transactions/fees.

Comparison of Radar Relay to Exchanges

Radar Relay


Maintain Custody of Funds

No Trading Fees

No Account / Signup

Has an API


Fast Trades

Radar Relay API Architecture

Our API is organized into three components: Feed API, Trading API, and Ethereum Nodes. Radar Relay is also compliant with the 0x Protocol’s Standard Relayer API.

Fig.1 Relay Architecture

Radar Relay and the 0x Standard

Using the 0x SRA allows you to interface with any other relayers or dApps across the ecosystem.

Across decentralized trading venues there are varying degrees of trust. Using our API means you are using our market data and the information we store and determine internally. This places some trust in the hands of our servers, but also provides convenience.

The trading tools built by the 0x Project team are an alternative to Radar Relay’s API. The Standard Relayer API focuses on the blockchain being the source of truth for all trade information. This allows for less trust in a central server but is at the cost of some convenience.

Read More About the SRA

Comparison of Radar Relay to SRA

Radar Relay


Easy Setup

Provides Order State

Automatically Converts Ethereum Units (uint256)

Trade on all Relayers

Automatically Converts token units (token decimals)

Requires order state management on the clientside (see 0x order watcher)

Can rely exclusively on trustless trade data from Ethereum

Fig.2 0x SRA Architecture

Contact Support, or get started below: