Vultr Customer Portal

1. Navigate to Products and click Compute.
2. Click your target Vultr VX1™ Cloud Compute instance to open its management page.
3. Navigate to the User-Data tab.
4. Enter your script or cloud config in the Cloud-Init User-Data field.
5. Click Update to apply the changes.

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 PATCH request to the Update Instance endpoint to update the instance’s Cloud-Init user data.
   console

   $ curl "https://api.vultr.com/v2/instances/{instance-id}" \
     -X PATCH \
     -H "Authorization: Bearer ${VULTR_API_KEY}" \
     -H "Content-Type: application/json" \
     --data '{
       "user_data" : "<cloud-init-data>"
     }'

   If successful, you receive a 200 status code response.