post /v1/notifications/channels/{id}/rotate
Rotate signing secret（仅 custom；id/挂接不动，旧 secret 立即失效）
Free (not billed). 新 signing_secret 仅此一次返回。旧 secret 立即失效：在途重试/resend 自动用新密钥重签，接收方需尽快更新。
Auth: Authorization: Bearer ac-… · billed per call (see Credits) — envelope {success,data,credit_cost} or {success:false,error}.
Parameters
| Name | In | Type | Description |
|---|---|---|---|
id * |
path | string |
channel id |
Responses
| Status | Description | Body |
|---|---|---|
200 | OK | application/json — object |
default | Error | application/json — ErrorResponse |