HTTP Raw Headers Problems

I wanted to send a very long JSON body, so I decided to select the toggle for JSON/RAW.

And for the Headers, I created as an expression like this using output from previous step:

However, when I click on the Execute Node, I get the following error.

Problem executing workflow

There was a problem executing the workflow:
“Cannot create property ‘accept’ on string ‘= [object Object]’”

This looks like a problem in the Header because it is pointing to = [object Object]’

Here is the detailed log:-

TypeError: Cannot create property 'accept' on string '= [object Object]'
    at Object.execute (/Applications/
    at Workflow.runNode (/Applications/
    at /Applications/

Please share the workflow

Information on my n8n setup

  • n8n version:0.182.0
  • Database you’re using (default: SQLite): Not sure. Whatever comes with the desktop app
  • **Running n8n with the execution process [own(default), main]: Not sure. I just clicked on Execute Node
  • Running n8n via desktop app

Hi @Anil_Punjabi, it seems you are mixing an expression (which is a Javascript object) with text here (the equal sign and whitespace = before your actual expression), resulting in JS to return a string of = [object Object] when combining both. Could you try removing this text including whitespaces so your expression starts with {{ and ends with }}?

OK removing that = sign fixed that problem.

However, now I am getting a server error like this.

User is not authorized to access this resource with an explicit deny

I know this means that the request was sent to the server because this error is from my endpoint.
How can I get the curl equivalent of what got sent to the server, so that I can test it in Postman?

Should I set something under Options? I tried JSON, but that didn’t help.

Figured out how to see the request headers.

I modified the URL temporarily to send to a URL – and I found this

Notice that the x-site-context received by webhooks-site is incorrect.
It is being sent as [object Object] in text, which is weird.

What should the structure be for the header? Here’s how I have formatted it.

{{ { “Content-Type”: “application/json”,“x-site-context”: {“account”:“5f689caa4216e7000750d1ef”},“Authorization” : "Bearer "+ $node[“HTTP Request”].json[“accessToken”] } }}

It seems, with the header above:

Content-Type is good.
Authorization is good
x-site-context is NOT GOOD.

Do you guys have any suggestions?