## Is there a rate limit on the API?

For Pollen API, there is a default rate limit of 6,000 queries per
minute.

## Do I have to enable billing?

A valid billing account is required to use the Pollen API. See [Enable
billing](https://developers.google.com/maps/documentation/pollen/cloud-setup#billing) to set up your project with a billing account.

## What happens if I query a location that is not supported?

If the latitude and longitude are not covered in the [supported country
list](https://developers.google.com/maps/documentation/pollen/coverage), the response will return a 400 error
code with the message, "Information is unavailable for this location. Please try
a different location."

## What happens if the plant has no pollen data but is supported in the country?

In cases where there is no pollen data for the selected location and date, the
response includes the plant code and display name for all plants covered in the
requested location with no other data fields. For example:

```json
"dailyInfo": [
    {
      "date": {
        "year": 2023,
        "month": 6,
        "day": 22
      },
      "pollenTypeInfo": [
          {
            "code": "GRASS",
            "displayName": "Grass"
          },
          {
            "code": "TREE",
            "displayName": "Tree"
          },
          {
            "code": "WEED",
            "displayName": "Weed"
          }
        ],
      "plantsInfo": [
          {
            "code": "HAZEL",
            "displayName": "Hazel"
          }
          {
            ...
          }
      ]
    }
]
```