Credential protection is important, but the permissions behind the credential matter just as much. If two API keys are exposed, the key that can only read one dataset creates less potential damage than a key that can administer the entire environment.
Grant only the access needed
Start with the smallest role that allows the user or application to complete its task. Add permissions when a real requirement appears rather than assigning broad administrator access by default.
Use separate roles for separate tasks
A daily user account should not require permanent administrator rights for occasional maintenance. Separate privileged roles or elevation workflows reduce the amount of time high-level permissions are active.
Scope application tokens
APIs frequently support read-only scopes, resource-level restrictions, environment boundaries, or individual actions. Use these controls rather than issuing a broad master key.
Make privilege temporary
Just-in-time or time-bound access reduces standing privilege. Even without specialized privileged-access tooling, temporary group membership or expiring accounts can reduce long-lived exposure.
Review privilege periodically
Roles accumulate as people change projects. Review access after job changes, project completion, contractor engagements, and organizational changes.
Combine least privilege with secure delivery
A one-time delivery mechanism reduces retention of the credential, while least privilege reduces what the credential can do if it is intercepted. These controls address different parts of the risk and work well together.