How can I enable JSON routes / url so I can get JSON data in Odoo 18?

Question

I have seen in presentations and posts that by changing the "odoo" part of the url to "json" I can then get a json response:
Example:
/odoo/project/5/tasks
/json/project/5/tasks
This works on Runbot and on demo.odoo.com [1] but not my production instance.
I would like to activate the /json/ view on URL change on my database.
What do I have to do to enable it?

[1] http://demo.odoo.com

Ray Carnes (ray) · Accepted Answer

You need to create a System Parameter and be a member of the *Access to export feature* group:
1) In Developer Mode, visit the System Parameters Menu.
2) Create a new record with Key as *web.json.enabled* - the Value is not important, as long as the key exists the feature will work
image [1]

3) Ensure you and any User wanting to access this feature are a member of the group:
image [2]

[1] /web/image/60966642-c6c299fd/image.png?access_token=ad50d086-0b62-4425-8584-73846d4a5c82
[2] /web/image

Zyndua Africa Solutions Ltd · Answer

Hey Ray,
Thanks for the answer but I have recreated the same but same error is appearing. Both the new record with the key
*web.json.enabled *and value as *True *(though you mentioned it doesnt matter). Still getting the error.

**Forbidden** Missing "Authorization" or Sec-headers for interactive usage

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