Update a campaign or transition its status (pause/resume/cancel).

PATCH 
/api/v1/campaigns/:id

Mutable fields depend on status. draft|scheduled: name, message_template, message_variations, scheduled_for, batch_size, batch_delay_minutes, status->sending|cancelled. sending: only status->paused|cancelled. paused: only status->sending|cancelled. completed|cancelled|failed: immutable (409). Scope: send_sms.

Request

Responses

200

Campaign updated; returns the same shape as GET /v1/campaigns/{id}.

400

Missing or invalid parameters

401

Invalid or missing API key

403

API key lacks the required scope for this endpoint

404

Resource not found or belongs to another account

409

Status transition invalid or campaign is in a terminal state.