HubSpot API reference documentation

HubSpot’s developer platform is a core part of our mission to empower organizations to grow better. Our APIs are designed to enable teams of any shape or size to build robust integrations that help them customize and get the most value out of HubSpot.

All HubSpot APIs are built using REST conventions and designed to have a predictable URL structure. They use many standard HTTP features, including methods (POST, GET, PUT, DELETE) and error response codes. All HubSpot API calls are made under and all responses return standard JSON.

Setting up

There are several ways to build integrations with HubSpot:

  • To build an internal integration for an individual HubSpot account (e.g., you want to build an app that can access and edit only authorized parts of your account to share or integrate with other parts of your organization), create a private app.
  • If you're looking to create a public app that can be installed across multiple HubSpot accounts, you should create a developer account. There are several reasons for this: A developer account is where you create HubSpot apps, each authenticated with OAuth and provided with a configurable set of features and permissions. You can also use your developer account to create test accounts, monitor app status and performance, or publish apps to the HubSpot App Marketplace.

Learn more about the different types of apps and account types in this article.

Client libraries

Client libraries are designed to help you interact with the HubSpot APIs with less friction. They are written in several different languages and help bridge the gap between your application and HubSpot’s APIs. They take away the need to know the exact URL and HTTP method to use for each API call among other things leaving you more time to focus on making your application. Learn more about our client libraries here



Package Link

githubSource Code


npm install @hubspot/api-client




composer require hubspot/api-client




gem install hubspot-api-client




pip install hubspot-api-client



API documentation

HubSpot’s API documentation is split into two sections: reference docs and integration guides.

Reference docs

All API reference docs include an overview section and an endpoint section. The API overview includes a brief summary of its functionality, use cases, and any special considerations for creating an integration. The endpoints section lists each endpoint, its parameters, and request examples in multiple languages.

Once you’ve configured your app’s auth settings in your developer account, you can use Postman or make test calls right from an endpoint reference page. 

Integration guides

If you want to learn the fundamentals of HubSpot’s platform or see an example before making your first API call, you can find sample apps and tutorials as well as detailed information about developer accounts, working with OAuth, API rate limits, and more in our Integration Guides section. 

Related: Learn more about authentication methods or OAuth.


Getting listed

When you’re ready to share your app with the world and become an app partner, read our listing and certification requirements. After that, you can create and manage your App Marketplace listing right from your developer account.


Support and community resources

Get your questions answered, make connections, and share your insights by joining HubSpot’s growing developer community forums and Slack community. These forums are a great place to make your voice heard — community feedback is incredibly important to us and our ongoing efforts to improve HubSpot’s developer experience.

You can also stay up to date on new features, announcements, and important changes by subscribing to the Changelog blog.


Building on the CMS

Looking to build a website, blog, landing page, lightweight app, or an email? Head over to our CMS developer docs.

Related docs

How to use the HubSpot APIs

Was this article helpful?
This form is used for documentation feedback only. Learn how to get help with HubSpot.