get https://api.apollo.io/api/v1/typed_custom_fields
Use the Get a List of Custom Fields endpoint to retrieve information about all of the custom fields that have been created in your Apollo account.
This endpoint does not require any parameters.
This endpoint requires a master API key. If you attempt to call the endpoint without a master key, you will receive a 403 response. Refer to Create API Keys to learn how to create a master API key.