> ## Documentation Index
> Fetch the complete documentation index at: https://docs.letterdrop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Choosing fields

> Return only the columns you need.

Every endpoint takes `fields`: a comma-separated list of the fields to return. Leave it out for all of them. Reach into a list with a dot:

```text theme={null}
fields=company_name,account_priority,contacts.contact_name,contacts.signals.signal_date
```

Naming a list alone (`contacts`) returns all of its fields. `account_id` and `signal_id` always come back, so a row can be matched to the next call. An unknown field is a 422. On `/analytics` metrics, `fields` picks metrics.

Contact emails and phone numbers are opt-in: add `include=contact_info`. They are the details your workspace has already enriched; empty means not enriched yet.


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