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Observed Unit Sales Velocity - Before and After Comparison
x402
Observed Unit Sales Velocity - Before and After Comparison is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).
Computes and compares retail unit sales velocity (units sold per day) across two time periods to quantify change
Price / call$0.01
Success—
StatusUnknown
How this service works
Observed unit sales velocity - Before and after comparison: Before and after comparison for Observed unit sales velocity. Supplied retail figures only, up to 200 records. No platform access, live rates or order execution. One of 25 new profiles across 20 shared operations in this industry. 0.01 USDC includes one bounded before and after comparison report.
Output
A bounded before-and-after comparison report containing the computed unit sales velocity (units per day) for each period, the absolute and/or relative change in velocity, and a structured summary derived from the two supplied retail data points — no live market rates or order execution included.
Example use cases
Measuring promotional campaign impact
“I ran a weekend promo and want to know if it actually moved the needle — before the promo I sold 120 units in 10 days, and during the promo I sold 95 units in 6 days. Can you compare my sales velocity before and after?”
Evaluating a price reduction effect
“We dropped our price last Tuesday. Before the change we sold 500 units over 30 days, and since the change we've sold 210 units in 10 days. Can you run a before-and-after sales velocity comparison to see if it's working?”
Assessing post-restock sell-through rate
“After restocking a slow-moving SKU we changed the shelf placement. Prior to the restock we moved 40 units in 14 days, and post-restock we moved 60 units in 10 days. Compare the unit velocity for me.”
Technical details
Endpoint
POSThttps://market.datapackvibe.com/x402/assistant-ar-retail-unit-sales-velocity-compare?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, inexpensive ($0.01 USDC) structured comparison of retail unit sales velocity across exactly two time windows using your own supplied figures. It is ideal for evaluating the impact of promotions, price changes, resets, or restocks without needing platform access, live data feeds, or order execution. Prefer alternatives if you need more than 200 records, real-time sales data, or multi-period trend analysis.
Side effects
- Missing required fields (sold_units or observed_days for either period) returns a validation error
- observed_days of 0 is rejected (exclusiveMinimum enforced) to prevent division-by-zero
- Values exceeding 1e12 are outside the allowed range and will be rejected
- Negative sold_units values are rejected (minimum: 0)
- Service may be unavailable if the x402 payment of 0.01 USDC is not successfully processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| after | object | |
| before | object |
Tags
x402
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