You can also try:
scrape:
- resource: https://www.kleenex.nl/api/sitecore/Pollen/GetPollenContentCity
method: POST
payload: "city=Amsterdam"
headers:
User-Agent: Home Assistant
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
scan_interval: 3600
sensor:
- name: Pollen (grass)
select: "li.day-container:nth-child(1) > button"
attribute: "data-grass-count"
unique_id: pollen_grass
value_template: >-
{{ value.split(" ")[0] }}
- name: Pollen (weeds)
select: "li.day-container:nth-child(1) > button"
attribute: "data-weeds-count"
unique_id: pollen_weeds
value_template: >-
{{ value.split(" ")[0] }}
- name: Pollen (trees)
select: "li.day-container:nth-child(1) > button"
attribute: "data-trees-count"
unique_id: pollen_trees
value_template: >-
{{ value.split(" ")[0] }}