Source: https://databento.com/docs/api-historical/basics/metered-pricing


### Metered pricing

Databento only charges for the data that you use.
You can find rates (per GB) for the various datasets and estimate pricing on
our [Data catalog]($PLATFORM_HOSTNAME/portal/browse). We meter the data by its
uncompressed size in [binary encoding](https://databento.com/docs/conventions/databento-binary-encoding.md).

When you stream the data, you are billed incrementally for each outbound
byte of data sent from our historical gateway. If your connection
is interrupted while streaming our data and our historical gateway detects
connection timeout over 5 seconds, it will immediately stop sending data
and you will not be billed for the remainder of your request.

Duplicate streaming requests will incur repeated charges. If you intend to
access the same data multiple times, we recommend using our batch download
feature. When you make a batch download request, you are only billed once
for the request and, subsequently, you can download the data from
the [Download center]($PLATFORM_HOSTNAME/portal/download-center) multiple
times over 30 days for no additional charge.

You will only be billed for usage of [time series](https://databento.com/docs/api-historical/timeseries.md) data.
Access to metadata, symbology, and account management is free.
The [Historical.metadata.get\_cost](https://databento.com/docs/api-historical/metadata/metadata-get-cost.md) method can be used to determine
cost before you request any data.

Related: [Billing management](https://databento.com/docs/portal/billing.md).