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**Category:** APIs & Integrations\
**Tags:** free\
**Created:** [July 3, 2025, 8:10am UTC](https://community.hubspot.com/t/insert-html-into-hubspot-site-head-using-api/135618 "2025-07-03T08:10:40Z")\
**Posts on this page:** 2\
**Page:** 1
**Author:**  [@MMervin](https://community.hubspot.com/u/MMervin)\
**Post date:** [July 3, 2025, 8:10am UTC](https://community.hubspot.com/t/insert-html-into-hubspot-site-head-using-api/135618/1 "2025-07-03T08:10:40Z")
I am developing an app in HubSpot. Once a HubSpot merchant add our app to their site, I want to insert some HTML code, including script tags, into the head section across their entire website. How can I achieve this using the HubSpot API?
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**Author:**  [@BrandonWoodruff](https://community.hubspot.com/u/BrandonWoodruff)\
**Post date:** [August 27, 2025, 1:25pm UTC](https://community.hubspot.com/t/insert-html-into-hubspot-site-head-using-api/135618/2 "2025-08-27T13:25:33Z")
Hello,
At this time, HubSpot’s APIs don’t provide a way to programmatically update the **Site header HTML** (the \ section).
To make sure you get the right outcome, it’s helpful to clarify a few things:
- Is your site fully **hosted on HubSpot CMS** , or are you embedding HubSpot forms/tracking into an external site?
- Do you need the code across **all pages** or just certain HubSpot landing pages?
- What type of code are you looking to add (analytics tracking, chatbot, verification tag, etc.)?
Let me know if this helps, or if you have any other questions!
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|  | **[Brandon Woodruff](https://www.linkedin.com/in/brandon-woody-woodruff/)**
Senior Software Developer @ [Pearagon](https://www.pearagon.com/)Still have questions? Reach out at [brandon@pearagon.com](mailto:brandon@pearagon.com)  |
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