Deprecated. Use Create pixel (v2), which requires you to declare where the pixel runs. This version keeps working until Sat, 24 Apr 2027 00:00:00 GMT, and every response carries Deprecation, Sunset and Link headers that say so.

Create a new tracking pixel. Simple mode: pass only a title (defaults applied). Detailed mode: include params and custom_fields for full control. allowed_origins and allow_any_origin are optional here. Without either, the pixel is created with no declared sites and origins_status is unverified. Name the target project with a project_id field.