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Commission-free Crypto Trading API is here!

Trading API

How to Use OAuth to Access Alpaca API?

Alpaca Team
Alpaca Team

This tutorial will be a step by step demonstration of connecting to OAuth using the Alpaca API. We will move forward assuming that you’ve registered on the Alpaca website. If you haven’t please visit Alpaca and sign up. Feel free to check out the other tutorials in this series at Alpaca Resources.

Alpaca - Commission-Free API First Stock Brokerage
Alpaca is a modern platform for trading. Alpaca’s API is the interface for your trading algorithms, bots, or applications to communicate with Alpaca’s brokerage and other services.


Alpaca implements OAuth 2.0 to allow third party applications to access Alpaca Trading API on behalf of the end-users. This document describes how you can integrate with Alpaca through OAuth.


Step 1:

Let’s Create a New OAuth app at the OAuth page in your account.

OAuth Apps
OAuth Apps

Step 2:

Enter the information for the app. Note all OAuth apps need to be approved by Alpaca before they can execute trades on behalf of users.

Application Information for App

Step 3:

As soon as you create the app, you will be issued your Client ID and Client Secret ID. These can be found by clicking “View App Credentials”.

Client ID and Client Secret ID
Client ID and Client Secret ID

Step 4:

To integrate your application with Alpaca, use the following flow:

GET https://app.alpaca.markets/oauth/authorize?response_type=code&client_id=YOUR_CLIENT_ID&redirect_uri=YOUR_REDIRECT_URL&state=SOMETHING_RANDOM&scope=account:write%20trading

When redirecting a user to Alpaca to authorize access to your application, you’ll need to construct the authorization URL with the correct parameters and scopes. Here’s a list of parameters you should always specify:

Parameters to Specify
Parameters to Specify

Step 5:

You will see an authorization screen. Once you approve access Alpaca will redirect you back to your redirect_uri with a temporary code parameter. If you specified a state parameter in step 1, it will be returned as well. The parameter will always match the value specified in step 1.


Step 6:

Your application will receive the authorization code, which can be used to exchange for an access token by making a POST request. If your app is meant for funded accounts you would use the api.alpaca.markets endpoint vs. the paper-api.alpaca.markets endpoint for paper trading

Parameters to Specify
Parameters to Specify

Once you have integrated and have a valid access token you can start making calls to Alpaca Trading API v2 on behalf of the end-user.


Commission Free Algorithmic Trading...Alpaca API


Thank you for using Alpaca. Here are a couple more links that  you might be interested in.

Alpaca GitHub repository

Alpaca
Alpaca builds an API for free stock trading. Alpaca has 39 repositories available. Follow their code on GitHub.

Alpaca Blog

Alpaca Blog | API for Stock Trading
Alpaca Blog for product updates, new integration, and more. Alpaca’s commission-free trading API is built for algorithmic trading and building apps

Alpaca Forum

Alpaca Community Forum
Alpaca user forum for FAQ, feature requests, many discussions around Alpaca stock trading API

Alpaca API documentation

Documentation | Alpaca
Alpaca API lets you build and trade with real-time market data for free.

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In Alpaca Newsletter for quants & developers, we will keep you updated on our product and community developments, market and research updates as well as list jobs and internships.

You can also follow Alpaca and our weekly updates on our LinkedIn, Alpaca Community Slack and @AlpacaHQ on Twitter!

Commission-Free trading means that there are no commission charges for Alpaca self-directed individual cash brokerage accounts that trade U.S. listed securities through an API. Relevant SEC and FINRA fees may apply.

Brokerage services are provided by Alpaca Securities LLC ("Alpaca"), memberFINRA/SIPC, a wholly-owned subsidiary of AlpacaDB, Inc. Technology and services are offered by AlpacaDB, Inc.

Trading API

Alpaca Team

API-first stock brokerage. *Securities are offered through Alpaca Securities LLC* http://alpaca.markets/#disclosures