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Re:TCG Card Appraisal — Actual Sold Prices
x402
Re:TCG Card Appraisal — Actual Sold Prices is a paid API for AI agents from www.retcg.xyz, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-12).
Returns real transaction-based market prices for a specific trading card by ID, including graded slabs, across multiple currencies, with optional cost-basis PnL and 1-year value projection.
Price / call$0.02
Success—
StatusUnknown
How this service works
What a trading card actually sold for, not what someone is asking — including the ones worth less than the postage, where other tools stop looking. Whether a slab's plastic paid for itself, and the trip onto Polygon or Solana and off again.
Output
Returns a JSON object with the card's identity (name, number, rarity), set metadata (heat score, momentum, print phase, age in days), a rows array of actual observed sold prices broken down by condition and grade (e.g. PSA 9) with sale count and date range, optional PnL if cost basis was provided, a 1-year value projection with drift assumptions, and an on-chain cryptographic attestation (signer address, signature, Merkle root) verifying the price data integrity.
Example use cases
PnL check on a graded slab
“I bought a PSA 9 Charizard ex 151 set card (pokemon:sv3pt5-199) for $300 on 2024-03-10 — can you pull the actual sold prices and tell me whether I'm up or down, in USD?”
Pre-sale price reality check
“Before I list my Umbreon VMAX Alt Art (pokemon:swsh4-215), can you tell me what copies have actually sold for recently — not just the asking prices? Show me raw and graded prices.”
Portfolio valuation in multiple currencies
“I need to value my collection for insurance purposes — can you appraise pokemon:sv3pt5-199 and give me the current sold-price data in USD, EUR, and USDC?”
Technical details
Endpoint
GEThttps://www.retcg.xyz/api/appraise/%7Bid%7D?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need actual transaction-verified sold prices (not listing/asking prices) for a specific trading card, especially for graded slabs or when you need multi-currency output, PnL calculations against a known cost basis, or cryptographic attestation of the price data. It covers low-value cards that other tools ignore. Prefer over general e-commerce search when you have a specific pokemontcg.io card ID and need defensible, sourced market data for insurance, resale, or portfolio tracking purposes.
Side effects
- Unknown or malformed card ID returns an error — must use game:cardId format like pokemon:sv3pt5-199
- No recent sales data available for low-liquidity cards may return empty rows
- Invalid date format for 'on' parameter (must be YYYY-MM-DD) causes bad request
- Unsupported currency in 'denoms' list is silently ignored or errors
- Payment failure (x402 protocol) blocks the response with a 402 status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "pokemon:sv3pt5-199",
"set": {
"heat": 0.69,
"name": "151",
"phase": "out-of-print",
"ageDays": 1094,
"momentum30": 0.042
},
"card": {
"name": "Charizard ex",
"number": "199",
"rarity": "Special illustration rare"
},
"paid": true,
"rows": [
{
"cond": "PSA 9",
"expo": -8,
"mant": 37160000000,
"basis": {
"n": 2,
"to": "2026-09-19",
"src": "ebay sold",
"from": "2026-02-27",
"kind": "observed"
},
"denom": "USD",
"price": 371.6
}
],
"attest": {
"root": "0x…",
"signer": "0xb0Fd9c696CE8B93Aee2e9f63A43A28383A5fa947",
"signature": "0x…"
},
"projections": {
"raw@365": {
"steps": [
{
"n": 58,
"days": 365,
"phase": "out-of-print",
"drift30": -0.0038
}
],
"value": 300.77
}
}
}
}Tags
x402
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