Vultr Customer Portal

1. Navigate to Products, expand the Network section, and click Reserved IPs.
2. Click your target reserved IP to open its management page.
3. Select your target Vultr VX1™ Cloud Compute instance from the Attach to Server drop-down menu.
4. Click Attach to apply the reserved IP to the instance.

Vultr API

1. Send a GET request to the List Instances endpoint and note your target instance’s ID.
   console

   $ curl "https://api.vultr.com/v2/instances" \
     -X GET \
     -H "Authorization: Bearer ${VULTR_API_KEY}"

2. Send a GET request to the List Reserved IPs endpoint and note the target reserved IP’s ID.
   console

   $ curl "https://api.vultr.com/v2/reserved-ips" \
      -X GET \
      -H "Authorization: Bearer ${VULTR_API_KEY}"

3. Send a POST request to the Attach Reserved IP endpoint to attach the reserved IP to the instance.
   console

   $ curl "https://api.vultr.com/v2/reserved-ips/{reserved-ip}/attach" \
     -X POST \
     -H "Authorization: Bearer ${VULTR_API_KEY}" \
     -H "Content-Type: application/json" \
     --data '{
       "instance_id" : "<instance-id>"
     }'