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Why can't I update a page property using the API?

On Windows 10 using the Notion API ...

I'm trying to update one column (property) value in one row (page) of my database using cURL. I keep getting an error when I send the following with appropriate replacements for the square bracketed [ ] items:

curl[the_page_id] -H "Authorization: Bearer [my_secret]" -H "Content-Type: application/json" -H "Notion-Version: 2022-06-28" -X PATCH --data '{"properties": {"Plot": { "text": "Hello" }}}'

"Plot" is the name of the column/property and "Hello" is the value with which I'm trying to update that column/property in the page specified by the PageID.

Here is the returned error:

      {"object":"error","status":400,"code":"invalid_json","message":"Error parsing JSON body."}
      curl: (3) unmatched brace in URL position 1:

As you can see, there is no unmatched brace (unless I am misinterpreting the error message). I tried switching the single and double quotes in the --data section with the same results. I tried replacing "text" with "rich_text" with the same results.

This almost exactly mimics the example provided by the Notion documentation here:

What am I doing wrong? Thanks.

1 Answer



not sure if this is still an issue that you need help with but here is an answer I could think of regardless.

The most straightforward approach that comes to mind would be to use a separate .json file for your data. This avoids any potential issues with command line quoting and makes it easier to manage and edit your JSON data.
This is how I would approach it.


  1. Create a file named data.json with the following content:
  "properties": {
    "Plot": {
      "text": "Hello"
  1. Use the following cURL command:
curl[the_page_id] -H "Authorization: Bearer [my_secret]" -H "Content-Type: application/json" -H "Notion-Version: 2022-06-28" -X PATCH --data @data.json

This method should ensure that the JSON data is correctly formatted and avoids any potential issues with command line quoting.


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