How to get SharePoint Site ID for API calls using the Browser

[nayan]

Introduction

If you are using ZappySys SharePoint Online Connector, you may encounter the following challenge when selecting the Site ID Parameter in the connection UI due to permission or UI limitations.

• Your Microsoft Graph permissions are limited, and you cannot list all sites (Throws access denied error)
• Your Site ID is not listed in the SharePoint Connector UI (Due to the maximum limit for items in the drop-down)

Regardless of the above issue, you can still manually build the full siteId by using the classic SharePoint REST API directly in your browser.

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Step 1 — Open the Site in Your Browser

Go to your SharePoint site, for example:

https://YOUR-COMPANY.sharepoint.com/sites/MY-SITE-NAME

Keep this tab open — you’ll use it as the base URL for the next step.

Example:

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Step 2 — Find the Site Collection ID

In the same browser window, navigate to this URL (append _api/site/id):

https://YOUR-COMPANY.sharepoint.com/sites/MY-SITE-NAME/_api/site/id

You’ll see an XML or JSON response showing the Site Collection ID GUID:

<?xml version="1.0" encoding="utf-8"?>
<d:Id xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" 
	xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" 
	xmlns:georss="http://www.georss.org/georss" 
	xmlns:gml="http://www.opengis.net/gml" 
	m:type="Edm.Guid">37bb36ba-49b5-4f39-a627-d0xxxxxxxx</d:Id>

Copy that value — this is your Site Collection ID. (example: 37bb36ba-49b5-4f39-a627-d0xxxxxxxx )

Example:

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Step 3 — Find the Web ID

Now open this URL (append _api/web/id):

https://YOUR-COMPANY.sharepoint.com/sites/MY-SITE-NAME/_api/web/id

The response will show the Web ID GUID:

<?xml version="1.0" encoding="utf-8"?><d:Id xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns:georss="http://www.georss.org/georss" xmlns:gml="http://www.opengis.net/gml" m:type="Edm.Guid">fbaac4df-73da-469a-86fa-b3xxxxxxxx</d:Id>

Copy that value — this is your Web ID.

Example:

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Step 4 — Build the Full siteId

Combine the three parts in this exact order:

{hostname},{site-collection-id},{web-id}

Example

your-company.sharepoint.com,37bb36ba-49b5-4f39-a627-d0xxxxxxx,fbaac4df-73da-469a-86fa-b3xxxxxxx

You can now use this value in Microsoft Graph API calls such as:

GET https://graph.microsoft.com/v1.0/sites/{siteId}/lists

Your URL in API call may look like this

https://graph.microsoft.com/v1.0/sites/your-company.sharepoint.com,37bb36ba-49b5-4f39-a627-d0xxxxxxx,fbaac4df-73da-469a-86fa-b3xxxxxxx/lists

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Summary

Value	Example	Source
Hostname	your-company.sharepoint.com	From site URL
Site Collection ID	37bb36ba-49b5-4f39-a627-d0xxxxxxx	_api/site/id
Web ID	fbaac4df-73da-469a-86fa-b3xxxxxxx	_api/web/id
Full Site ID	your-company.sharepoint.com,37bb36ba-49b5-4f39-a627-d0xxxxxxx,fbaac4df-73da-469a-86fa-b3xxxxxxx	Combine all

Now you can use this value on your SharePoint API Connector UI like below