The Twilio SendGrid Legacy Marketing Campaigns Contacts API allows you to manage your marketing contacts programmatically. This API is operational, but we recommend using the current version of Marketing Campaigns' [Contacts API](https://docs.sendgrid.com/api-reference/contacts/), [Lists API](https://docs.sendgrid.com/api-reference/lists/), and [Segments API](https://docs.sendgrid.com/api-referenc. The API exposes 36 endpoints secured with bearer authentication.
36 endpointsThe Twilio SendGrid Legacy Marketing Campaigns Sender Identites API allows you to manage the email addresses used to send your marketing email. This API is operational, but we recommend using the current version of Marketing Campaigns to manage your [senders](https://docs.sendgrid.com/api-reference/senders/). See [**Migrating from Legacy Marketing Campaigns**](https://docs.sendgrid.com/ui/sending-. The API exposes 6 endpoints secured with bearer authentication.
6 endpointsThe Twilio SendGrid Marketing Campaigns Contacts API allows you to manage all of your marketing contacts programmatically. You can also import and export contacts using this API. The Contacts API allows you to associate contacts with lists and segments; however, to manage the lists and segments themselves, see the [Lists API](https://docs.sendgrid.com/api-reference/lists/) and [Segments API](https. The API exposes 15 endpoints secured with bearer authentication.
Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | shStep 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register # connects your agent to your Jentic One instanceJentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.