List the custom contact fields defined for your site.

Base URL: https://api-admin-us-east.velaro.com/api/v1. Send your API key as Authorization: Bearer vlk_.... Create keys under Settings > API Keys; each key carries only the scopes you grant it.

Lists the site's custom contact field definitions. Fields that are not available through the API are excluded.

GET /api/v1/custom-fields

Required scope: read:contacts

Common responses: 401 for a missing or invalid key, 403 when the key lacks the scope, 429 when the rate limit is reached.