WooCommerce Shipping USPS plugs the USPS Web Tools API into Woo: live rate quoting at checkout for Priority Mail, Priority Mail Express, First-Class Package, Media Mail, Ground Advantage, plus the international services (Priority Mail International, First-Class Package International). The plugin records the chosen service, the resolved rate, and the tracking number as meta on the order. The integration ships orders well; what it does not ship is an in-WP dashboard.

SleekView Charts joins wc_orders with the USPS meta and surfaces it as a queryable dataset. A Number averages USPS rate per order so the per-shipment cost lives at the top of the dashboard. A Bar groups orders by USPS service so the workhorse First-Class and Ground Advantage volumes stand out against Priority Express. A Pie of destination ZIP-code regions or countries shows where USPS volume concentrates. An Area trends USPS shipments per day so peak ship-out days have a curve, not a memory.

The plugin keeps owning the USPS API, the rate quoting, and the label purchase. SleekView gives the shipping team an in-WordPress metrics layer that reads what the integration already writes.

Most US small and mid-size stores route a large share of domestic parcels through USPS because the rates are competitive on lightweight envelopes and small packages. The plugin gets the rates onto the order; the WordPress admin treats them as per-order detail rather than aggregated signal. SleekView Charts pivots the same meta keys into four cards that answer the actual operational questions: how much does USPS cost on average, which service do customers pick, where is the volume going, and what does the daily curve look like.

The dashboard updates as orders are shipped, so the impact of a rate change or a checkout-rule tweak shows the same day. USPS keeps printing labels. SleekView Charts makes the data legible.