Bounded incoming-call commands over Mint. The host supplies :api_key.

Call from an application-supervised worker. Each invocation uses one stable command_id across at most three attempts and an 8-second total deadline. :max_attempts (1–3) and :timeout_ms (1–30,000) are configurable. HTTP success establishes command acceptance only; signed webhooks establish call progress. Transport/timeout/5xx failures can leave the remote outcome unknown. Errors retain bounded numeric :telnyx_codes, never upstream text. An exact HTTP 422 / 90018 response also reports remote_call_state: :ended; this is evidence of call state, not acceptance of this command or an earlier attempt.

No redirects are followed. :base_url defaults to https://api.telnyx.com/v2; plain HTTP is accepted only for explicit loopback test servers.