This quickstart walks through creating an API key, setting up the International Exchange Java SDK (INTX Java SDK), and making your first API call.

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Initial Setup

  1. Generate an API Key: From the web UI, navigate to API.
  2. Authenticate: Ensure you authenticate all API requests. Detailed guidance is available at Authentication.
REST API URL:https://api.international.coinbase.com/api/v1

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Using the INTX Java SDK

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Setting up the SDK

The INTX Java SDK is vended through Maven. To use these in your own project, install the dependencies using Maven, where the current version is 1.0.0: 
<dependency>
    <groupId>com.coinbase.intx</groupId>
    <artifactId>coinbase-intx-sdk-java</artifactId>
    <version>1.0.0</version>
</dependency>
To use this SDK, initialize the Credentials class and create a new client. The Credentials class is JSON enabled. Ensure that INTX API credentials are stored in a secure manner. The JSON format expected for credentials is: 
INTX_CREDENTIALS='{ "accessKey": "", "passphrase": "", "signingKey": "", "portfolioId": ""}'

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Making your first API call

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Listing Portfolios

The following code snippet demonstrates how to make your first API call using the INTX Java SDK. This example lists all portfolios associated with your provided API key. 
package com.coinbase.examples;

import com.coinbase.intx.client.CoinbaseIntxClient;
import com.coinbase.intx.credentials.CoinbaseIntxCredentials;
import com.coinbase.intx.errors.CoinbaseIntxException;
import com.coinbase.intx.factory.IntxServiceFactory;
import com.coinbase.intx.model.portfolios.*;
import com.coinbase.intx.portfolios.PortfoliosService;
import com.coinbase.intx.portfolios.PortfoliosServiceImpl;
import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {
    public static void main(String[] args) throws CoinbaseIntxException {
        String credsStringBlob = System.getenv("INTX_CREDENTIALS");
        ObjectMapper mapper = new ObjectMapper();

        try {
            CoinbaseIntxCredentials credentials = new CoinbaseIntxCredentials(credsStringBlob);
            CoinbaseIntxClient client = new CoinbaseIntxClient(credentials);

            PortfoliosService portfoliosService = IntxServiceFactory.createPortfoliosService(client);

            ListPortfoliosResponse listResponse = portfoliosService.listPortfolios();
            System.out.println("List Portfolios Response:");
            System.out.println(mapper.writerWithDefaultPrettyPrinter().writeValueAsString(listResponse));

        } catch (Throwable e) {
            throw new CoinbaseIntxException("Failed to retrieve the list portfolios response", e);
        }
    }
}

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Creating an Order

This second example demonstrates how to use the INTX Java SDK to create a new order: 
package com.coinbase.examples;

import com.coinbase.core.credentials.CoinbaseCredentials;
import com.coinbase.intx.errors.CoinbaseIntxException;
import com.coinbase.intx.model.orders.CreateOrderRequest;
import com.coinbase.intx.model.orders.CreateOrderResponse;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.coinbase.intx.client.CoinbaseIntxHttpClient;

public class Main {
    public static void main(String[] args) throws CoinbaseIntxException {
        String credsStringBlob = System.getenv("INTX_CREDENTIALS");
        ObjectMapper mapper = new ObjectMapper();

        try {
            CoinbaseCredentials credentials = new CoinbaseCredentials(credsStringBlob);
            CoinbaseIntxHttpClient client = new CoinbaseIntxHttpClient(credentials);

            CreateOrderRequest createReq = new CreateOrderRequest.Builder()
                    .clientOrderId("7f32e67e-8f7d-4b71-b22d-1c8b90b1aae4")
                    .side("BUY")
                    .size("0.005")
                    .tif("GTC")
                    .price("2000")
                    .portfolio("018a04e1-2006-7e1c-912e-23c2eb75f06f")
                    .instrument("ETH-USDC")
                    .type("LIMIT")
                    .build();
            CreateOrderResponse listResponse = client.createOrder(createReq);
            System.out.println("List Portfolios Response:");
            System.out.println(mapper.writerWithDefaultPrettyPrinter().writeValueAsString(listResponse));

        } catch (Throwable e) {
            throw new CoinbaseIntxException("Failed to retrieve the list portfolios response", e);
        }
    }
}