Returns a single contact, including its custom `data` values and the channels it can be reached on. To find a contact's ID by email address or `external_id`, use [List contacts](/docs/api/reference/list-contacts). ID of the contact to fetch (`con_`-prefixed). ID of the contact (`con_`-prefixed), accepted by every operation that takes a `contact_id`. The contact's email address, stored trimmed and lowercased. Unique within the workspace. The contact's first name. Available in broadcast templates as the `contact.first_name` variable. The contact's last name. Available in broadcast templates as the `contact.last_name` variable. Your own identifier for this contact, such as a user ID in your system. Unique within the workspace when set. Custom property values for this contact, available as template variables in broadcasts. Each key is a property created via the contact properties API, and each value is a string, number, or boolean matching the property's declared type (strings up to 500 characters). Total size is capped at 2 KB serialized. Values stored under a property that was later archived remain readable here. Channels this contact can be reached on, derived from the identifiers it has. A contact with an email address includes `email`. More values are added as a contact gains identifiers for other channels.