Confluence Rest API: Why can't I create page?

[Kelly_Graver]

I'm using OAuth 2.0 (3LO) to access the Confluence API from my app. I'm able to GET spaces fine, but trying to POST a new page gives me a 403 error. This is how my request is structured using superagent:

request.post('https://api.atlassian.com/ex/confluence/<MyCloudId>/wiki/rest/api/content')
.set('Authorization', 'Bearer ' + <MyAccessToken>)
.send({
  "type": "page",
  "title": "Test",
  "space": {
    "key": "TS"
  },
  "body": {
    "storage": {
      "value": "<p>Test page</p>",
      "representation": "storage"
    }
  }
})
.then(...);

The documentation says a response code of 403 either means the space doesn't exist or I don't have permission to create the page.

I've tried different space keys and IDs from my Confluence instance and triple checked I have the OAuth scope of write:confluence-content, but still getting 403.

Not sure what I'm doing wrong, any help would be appreciated!

[Kelly_Graver · Accepted solution]

For anyone having a similar issue, I got it to work in Postman by adding these headers to my request:

'X-Atlassian-Token': 'no-check'

'Accept': 'application/json'

'Content-Type': 'application/json'