@Sars Input is not an array, so the corrected config should be:

input:
    http_client:
        headers: {}
        rate_limit: default
        timeout: 5s
        url: http://192.168.1.100:80/api/v1/measurements
        verb: GET

rate_limit_resources:
  - label: default
    local:
      count: 1
      interval: 1s