Changelog

Versioned, additive changes to the public API. Breaking changes require a new /v{N} prefix and a deprecation window on the old surface; see the versioning policy in the API reference.

Unreleased

• 2026-08-14 — plan_id on GET /v1/subscribers now matches only subscribers currently on the plan (was: matched any historical subscription or line, so a retired plan could return tens of thousands of cancelled subscribers). New ever_on_plan_id param provides that historical behavior explicitly.
• Docs site launched at docs.sandbox.helium-os.example.
• Interactive try-it on every endpoint; multi-language code samples on every operation.
• State diagrams for SIM + Port resource guides.