OptinMonster WordPress Plugin API
The API host the first-party OptinMonster WordPress plugin calls (`OPTINMONSTER_API_URL`). Serves the same versioned surface and error envelope as api.optinmonster.com — `v1/optins`, `v1/verify`, `v2/sites`, `v2/sites/origin`, `v2/sites/{siteId}`, `v2/key/regenerate` and `v2/revenue/{accountId}` — and additionally accepts the `OMAPI-Referer`, `OMAPI-Sender`, `OMAPI-Site`, `OMAPI-Version` and `OMAPI-Plugins` context headers the plugin sends.