# Logs

Use logs to view detailed information on API and webhook transactions.

By default, log data is organized into four segments:

- API crashes: Contains logs on API crashes (`status` *greater or equal to* `500`).
- API errors: Contains logs on API errors (`status` *is between* `409`, `499`).
- API logs: Contains logs unfiltered API logs.
- Tax logs: Contains unfiltered tax logs.
- Webhook logs: Contains unfiltered webhook logs.


To add or manage segments, or to apply or edit filters on a segment, see [Segments](/docs/settings/segments).

## View logs information

1. In the left navigation bar, press , press **Logs**, then click: **API crashes**, **API errors**, **API logs**, or **Webhook logs**.
2. Press a log item in the table. Detailed log information is displayed.


## Filter logs

This section describes how to filter logs based on related IDs.

### Filter webhook logs by related entity IDs

Use this process to find webhook logs related to particular customers, transactions, or invoices.

1. In the left navigation bar, press , press **Logs**, then press **Webhook logs**.
2. In the top right of the table, press .
3. In the **Filter** dropdown, select **Entity ID**
4. In the **Operation** dropdown, select a condition.
5. In the **Value** field, enter ID values. 
Optionally, to compare against lists of data values, create a value list and use it in this filter. For more information, see [Value lists](/docs/automations/create-a-value-list#use-a-value-list-in-a-filter-or-segment).
6. In the dropdown or text field, enter or select values.
7. Press **Apply filter**.
8. Optionally, to save the filtered data to the active segment, press **Save**.
9. Optionally, to create a new segment based on the filtered data, press **Save segment as**, enter a name for the new segment, and then press **Save**.


### Filter API logs by related IDs

Use this process to find API logs related to particular customers, transactions, or invoices.

1. In the left navigation bar, press , press **Logs**, then select **API crashes**, **API Errors**, or **API logs**.
2. In the top right of the table, press .
3. In the **Filter** dropdown, select: **Related IDs Customer ID**, **Related IDs token ID**, or **Related IDs transaction ID**.
4. In the **Operation** dropdown, select a condition.
5. In the **Values** field, enter ID values. 
Optionally, to compare against lists of data values, create a value list and use it in this filter. For more information, see [Value lists](/docs/automations/create-a-value-list#use-a-value-list-in-a-filter-or-segment).
6. In the dropdown or text field, enter or select values.
7. Press **Apply filter**.
8. Optionally, to save the filtered data to the active segment, press **Save**.
9. Optionally, to create a new segment based on the filtered data, press **Save segment as**, enter a name for the new segment, and then press **Save**.


### Filter tax logs by related entity IDs

Use this process to find tax logs related to particular invoices, or credit memos.

1. In the left navigation bar, press , press **Logs**, then press **Tax logs**.
2. In the top right of the table, press .
3. In the **Filter** dropdown, select **Entity ID**
4. In the **Operation** dropdown, select a condition.
5. In the **Value** field, enter ID values. 
Optionally, to compare against lists of data values, create a value list and use it in this filter. For more information, see [Value lists](/docs/automations/create-a-value-list#use-a-value-list-in-a-filter-or-segment).
6. In the dropdown or text field, enter or select values.
7. Press **Apply filter**.
8. Optionally, to save the filtered data to the active segment, press **Save**.
9. Optionally, to create a new segment based on the filtered data, press **Save segment as**, enter a name for the new segment, and then press **Save**.


## Related topics

- [Customize tables](/docs/data-tables/customize-tables)
- [Segments](/docs/settings/segments)
- [Value lists](/docs/automations/create-a-value-list)