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Deal Verdict API
x402
Deal Verdict API is a paid API for AI agents from deal-verdict-api-production.up.railway.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Determines whether a specific product is meaningfully discounted right now across multiple retailers, returning a single verdict: deal_found, no_deal, or insufficient_data.
Price / call$0.05
Success—
StatusUnknown
How this service works
Resolve a plain-language product to canonical models, check every reachable retailer, and return a single deal verdict (deal / no deal / insufficient data) with a discount, confidence, and coverage report. Sells the answer, not the underlying listings. Human UI (connect a wallet in-browser): https://deal-verdict-frontend-production.up.railway.app
Output
A JSON object containing: a verdict string (deal_found, no_deal, or insufficient_data), the current best price found, the retailer offering that price, the store ID, the best discount percentage found, the requested threshold, a list of merchants checked and unreachable, confidence level (high/medium/low), whether the price was verified, the reference price source, size/variant matched, and a plain-English summary explaining the verdict.
Example use cases
Home improvement purchase timing
“I'm thinking about buying a 50-gallon water heater — can you check if it's meaningfully discounted at Home Depot or Lowe's right now? I'd want at least 15% off before pulling the trigger.”
Seasonal appliance deal check
“Is a Dyson V15 vacuum actually on sale anywhere right now, or are the prices just inflated 'sale' prices? I want a real discount of at least 20% off the normal price.”
Gift purchase deal verification
“I found a KitchenAid stand mixer listed at $349 on Walmart — is that actually a good deal? Check if it's at least 15% below what it normally sells for across major retailers.”
Technical details
Endpoint
POSThttps://deal-verdict-api-production.up.railway.app/verdictWhen to prefer
Choose this endpoint when you need a single definitive buy/no-buy signal for a specific product rather than a raw price feed or product search results. It is ideal for automating purchase decisions, deal alerts, or budget-conscious shopping workflows where the agent must resolve a boolean 'is this actually on sale?' question without building custom price-comparison logic. Prefer it over general price APIs when you want multi-retailer coverage collapsed into one verdict with a configurable discount threshold.
Side effects
- Retailer pages unreachable or blocked — listed in merchants_unreachable with verdict potentially downgraded to insufficient_data
- Product not found at any checked retailer — returns insufficient_data verdict
- Ambiguous product name matches wrong variant — size_or_variant field may indicate mismatch
- Reference price cannot be computed — reference_source falls back to computed with lower confidence
- Payment failure — x402 payment of $0.05 USDC not processed, request rejected before execution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| product | string | The product to shop for, in plain language. Brand and model help but are not required, e.g. '50 gallon natural gas water heater' or 'Bosch 800 series dishwasher'. |
| category | string | Optional coarse category hint. |
| location | string | Optional city or ZIP. Localizes the price searches to that area (a city suits the aggregated feed; a ZIP localizes store delivery). No per-store fan-out. |
| variants | array | Optional size/variant hints, e.g. ['50 gallon']. |
| attribute | string | A required attribute, e.g. 'gas', 'stainless', '15-inch'. |
| product_url | string | Optional link to a specific product page. The service reads the page's title, model/SKU, and price to identify the exact product and default the reference price. Only the answer is returned - never the page's content or URL. |
| reference_price | number | Optional. Your own reference/list price to judge against. If omitted, the service uses a trailing median of observed prices. |
| discount_threshold | number | How deep a discount counts as a deal, as a fraction off the reference price. 0.30 means 'only tell me if something is at least 30% off'. Defaults to the service setting. |
Output
Schema · Response
{
"type": "json",
"example": {
"leads": [],
"price": 591,
"methods": [
"per-store retailer lookup"
],
"summary": "A deal was found: home_depot is 21.0% below the computed reference price for this product, at $591.00, which meets your requested threshold of 15% off. Checked 3 retailer(s).",
"verdict": "deal_found",
"retailer": "home_depot",
"store_id": "6970",
"confidence": "high",
"price_verified": true,
"size_or_variant": "50 gallon",
"reference_source": "computed",
"merchants_checked": [
"home_depot",
"lowes",
"walmart"
],
"best_discount_found": 0.21,
"threshold_requested": 0.15,
"merchants_unreachable": []
}
}Tags
x402
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