Pay once · No Friday subscription
See whether email engagement or post-click sales moved.
Included in the $9.00 Shelf Kit
eBay Store sellers, agencies, and retention teams comparing aggregate active-campaign performance across equal report windows before a human revises an opted-in campaign.
Delivery: usually a structured result, workbook, or ZIP depending on the tool.
Friday compares only aggregate open counts, listing-link click counts, campaign-related sales, and equal report dates you supply. It accepts no subscriber, buyer, recipient, address, email, message, order, or listing data; reads no eBay account; and verifies no metric. eBay reports all active Store Email campaigns for a selected period, so a change cannot isolate one campaign or prove email caused a sale. Friday does not publish listings and never creates, edits, schedules, or sends a campaign, email, or message. A human must verify the source reports and business context.
Synthetic sample
{
"period_count": 3,
"window_days": 31,
"periods": [
{
"period_label": "May baseline",
"open_count": 1000,
"listing_link_click_count": 120,
"campaign_related_sales": 2400.0,
"listing_link_clicks_per_100_opens": 12.0,
"sales_per_listing_link_click": 20.0,
"data_quality_flags": []
},
{
"period_label": "June comparison",
"open_count": 1100,
"listing_link_click_count": 110,
"campaign_related_sales": 2750.0,
"listing_link_clicks_per_100_opens": 10.0,
"sales_per_listing_link_click": 25.0,
"data_quality_flags": []
},
{
"period_label": "July latest",
"open_count": 1320,
"listing_link_click_count": 165,
"campaign_related_sales": 4125.0,
"listing_link_clicks_per_100_opens": 12.5,
"sales_per_listing_link_click": 25.0,
"data_quality_flags": []
}
],
"consecutive_changes": [
{
"from_period_label": "May baseline",
"to_period_label": "June comparison",
"engagement_change": "decreased",
"post_click_revenue_change": "increased",
"campaign_related_sales_delta": 350.0
},
{
"from_period_label": "June comparison",
"to_period_label": "July latest",
"engagement_change": "increased",
"post_click_revenue_change": "unchanged",
"campaign_related_sales_delta": 1375.0
}
],
"baseline_to_latest": {
"open_count_delta": 320,
"open_count_delta_percent": 32.0,
"listing_link_click_count_delta": 45,
"listing_link_click_count_delta_percent": 37.5,
"campaign_related_sales_delta": 1725.0,
"campaign_related_sales_delta_percent": 71.875,
"listing_link_clicks_per_100_opens_delta_points": 0.5,
"sales_per_listing_link_click_delta": 5.0,
"engagement_change": "increased",
"post_click_revenue_change": "increased"
},
"periods_with_data_quality_flags": 0,
"publish_status": "draft_needs_review",
"safety": "Aggregate seller-supplied report math only. No subscriber data is accepted, no change proves email caused a sale, and no campaign or message is sent."
}
This sample uses synthetic facts. Your output is generated only from the facts you submit.
POST /v1/ebay/store-email/performance-comparison
Exact x402 price: $0.25. Use the public OpenAPI schema and Base USDC payment flow. The response returns a private job URL and temporary token.