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Card Hedge Comparable Sales (Comps)
x402
Card Hedge Comparable Sales (Comps) is a paid API for AI agents from api.cardhedger.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-28).
Returns comparable sales prices for a specific trading card, with anomaly filtering and optional time-weighting via WMA algorithm.
Price / call$0.02
Success—
StatusUnknown
How this service works
Get comparable sales (comps) for a card, with anomaly filtering and optional time-weighting. · needs a card_id (resolve via card-search, card-match, or image-match)
Output
Returns a list of comparable sale prices for the specified card and grade, cleaned of anomalies. If time_weighted is true, recent sales are emphasized using a Weighted Moving Average (WMA) algorithm. If include_raw_prices is true, the unfiltered raw sale data is also returned alongside the comps.
Example use cases
Pricing a card before selling
“I'm about to list a BGS 9.5 version of card ID card_789 on the marketplace — can you pull 20 comps with time-weighting on so I get a fair current price?”
Spotting anomalies in card sales
“Get me 50 comparable sales for card ID card_456 graded PSA 9, and include the raw prices too so I can see what anomalies got filtered out.”
Quick market value check
“What's the going rate for card ID card_321 in PSA 10 right now? Just pull 5 comps with time-weighting so I see what it's actually selling for lately.”
Technical details
Endpoint
POSThttps://api.cardhedger.com/v1/agent/cards/comps?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need market-calibrated, anomaly-filtered comparable sales for a specific card and grade — ideal for pricing decisions, valuation, or buy/sell analysis. Prefer this over the raw latest-prices endpoint when you want cleaner, statistically sound comp data rather than all raw prices across grades.
Side effects
- Invalid or unknown card_id — must be resolved first via card-search, card-match, or image-match
- Grade string not recognized or unavailable for that card — returns empty or error
- Count out of range (must be 1–100) — returns validation error
- No sales data available for the requested grade — returns empty comps array
- Payment failure or insufficient USDC balance — request rejected before processing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| count | integer | Number of comp prices (1-100) |
| grade | string | Card grade (e.g., 'PSA 10', 'BGS 9.5') |
| card_id | string | Card ID — resolve one via card-search, card-match, or image-match. |
| time_weighted | boolean | If true, weight recent sales more heavily using WMA algorithm |
| include_raw_prices | boolean | If true, include raw price data in response |
Tags
x402
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