Preview a Collection filter without changing the feed

curl --request POST \
  --url https://api.smry.ai/v1/feeds/filters/preview \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "collection": {
    "id": 12
  },
  "filter": {
    "prompt": "Software engineering articles",
    "whenUncertain": "include"
  }
}
'

import requests

url = "https://api.smry.ai/v1/feeds/filters/preview"

payload = {
    "collection": { "id": 12 },
    "filter": {
        "prompt": "Software engineering articles",
        "whenUncertain": "include"
    }
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    collection: {id: 12},
    filter: {prompt: 'Software engineering articles', whenUncertain: 'include'}
  })
};

fetch('https://api.smry.ai/v1/feeds/filters/preview', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "object": "feed_filter_preview",
  "previewToken": "<string>",
  "collection": {},
  "collectionRevision": 123,
  "filter": {
    "prompt": "<string>",
    "whenUncertain": "include"
  },
  "counts": {
    "included": 123,
    "excluded": 123,
    "uncertain": 123
  },
  "samples": {
    "included": [
      {}
    ],
    "excluded": [
      {}
    ]
  },
  "coverage": {}
}

{
  "error": "cursor: expected a next_cursor from a previous response.",
  "code": "invalid_request",
  "field": "where.published_after",
  "hint": "<string>",
  "retryable": true,
  "retryAfter": 123,
  "details": "<string>"
}

{
  "error": "cursor: expected a next_cursor from a previous response.",
  "code": "invalid_request",
  "field": "where.published_after",
  "hint": "<string>",
  "retryable": true,
  "retryAfter": 123,
  "details": "<string>"
}

{
  "error": "cursor: expected a next_cursor from a previous response.",
  "code": "invalid_request",
  "field": "where.published_after",
  "hint": "<string>",
  "retryable": true,
  "retryAfter": 123,
  "details": "<string>"
}

{
  "error": "cursor: expected a next_cursor from a previous response.",
  "code": "invalid_request",
  "field": "where.published_after",
  "hint": "<string>",
  "retryable": true,
  "retryAfter": 123,
  "details": "<string>"
}

{
  "error": "cursor: expected a next_cursor from a previous response.",
  "code": "invalid_request",
  "field": "where.published_after",
  "hint": "<string>",
  "retryable": true,
  "retryAfter": 123,
  "details": "<string>"
}

{
  "error": "cursor: expected a next_cursor from a previous response.",
  "code": "invalid_request",
  "field": "where.published_after",
  "hint": "<string>",
  "retryable": true,
  "retryAfter": 123,
  "details": "<string>"
}