Send a test delivery

Sends a synthetic `webhook.test` event to the endpoint, signed exactly like a real delivery (Standard-Webhooks headers over the raw body). Use it to verify your signature handling before subscribing to real events. Disabled endpoints return 409 `resource_conflict`.

curl -X POST "https://example.com/v1/webhook-endpoints/string/test"

{  "delivery_id": "string",  "succeeded": true,  "http_code": -9007199254740991,  "error": "string"}