Skip to contentSkip to navigationSkip to topbar
Twilio SendGrid Docs
Page tools
Looking for more inspiration?Visit the

Contacts API - Custom Fields

(warning)

Legacy Marketing Campaigns

This covers the obsolete Legacy Marketing Campaigns API.

(information)

Info

For the most up-to-date information on the Custom Fields API, please visit the new Marketing Campaigns Custom Fields API.

The Custom Fields API lets you create and manage custom fields for your contacts. Custom fields are used to store additional information about your contacts. For example, you might use custom fields to store a contact's birthday, their favorite color, or any other information that is relevant to your business.