I am struggling with creating a new list item with Person or Group column via HTTP request in Power Automate while using claims of the users. I can't get the syntax to work.

I was able to create workaround updating (not creating) item that works, but with this I need to create empty item before my workaround below.

Any idea how to make it works for create item HTTP Request?

My current HTTP request:

Method: POST
Uri: _api/web/lists/getbytitle('LISTTITLE')/items(123)/validateUpdateListItem

Headers: <none>
    "formValues": [{
        "FieldName": "AssignedToMultiSelect",
        "FieldValue": "[{'Key':'user_claims'}]"
  • Any reason you are not using "create item" action or only /items endpoint to create a list item instead of /validateUpdateListItem? Oct 4, 2022 at 3:19
  • That's the point I couldn't find the working syntax of HTTP Request with just /items. "Create item" is hard to move between tenants and also I couldn't set alternative name in hyperlink column.
    – Popkornak
    Oct 4, 2022 at 7:15

1 Answer 1


To add items use AddValidateUpdateItemUsingPath instead of ValidateUpdateListItem.

You should use the following formats for the FieldValue property for People or Group fields. The Key property value should be 'i:0#.f|membership|' plus the user's email address.

With single select: "FieldValue":"[{'Key':'i:0#.f|membership|[email protected]'}]"

With multiple select: "FieldValue":"[{'Key':'i:0#.f|membership|[email protected]'},{'Key':'i:0#.f|membership|[email protected]'}]"

  • that's what I am using now, but I cannot manage to make working HTTP Request to CREATE item, I am missing some headers settings or body syntax idk.
    – Popkornak
    Oct 4, 2022 at 18:22
  • To add an item use AddValidateUpdateItemUsingPath instead of ValidateUpdateListItem. The body format for the request is similar. Here's an example: learn.microsoft.com/en-us/sharepoint/dev/sp-add-ins/… Oct 4, 2022 at 18:29
  • its working with /GetByTitle('Test')/AddValidateUpdateItemUsingPath ! Thank you, I don't know why I did not found this documentation earlier! post it in the answer, I will mark it as accepted.
    – Popkornak
    Oct 4, 2022 at 22:14
  • Glad I could help. I updated my answer to include the information from my comment above. Oct 5, 2022 at 12:11

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