Writing a Terraform provider sounds like a big-company activity, something HashiCorp partners do with a team and a roadmap. In practice, if your API has CRUD endpoints, the provider is mostly plumbing. Here is the map worth having before you start. The running example throughout is the open-source Terraform provider for SMTPfast , a transactional email API. It is a small, complete provider you can read end to end as a reference: https://github.com/smtpfast/terraform-provider-smtpfast ...