Trading-card appraisal
Trading-card appraisal: raw and every grader×grade (PSA/BGS/CGC/SGC) in USD, EUR, USDC, EURC, GBP, JPY, ETH, SOL and BTC, each with its source, n and window; the set's lifecycle phase, measured 30-day momentum and heat; projections through the phases ahead; PnL net of venue fees; break-even; EIP-712 signed. Pokémon only for now.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
1018 msmedian answer time
$0.02listed price per call
$0.02price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://www.retcg.xyz/api/appraise/:id
| Category | Everything else |
|---|---|
| Provider host | www.retcg.xyz |
| Networks | eip155:137, eip155:5042, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 5 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.02 | 1018 ms |
Example input (from the provider)
{
"method": "GET",
"pathParams": {
"id": "pokemon:swsh7-215"
},
"queryParams": {
"denoms": "USD,EUR,SOL",
"on": "2026-06-01",
"paid": "12.50"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"pathParams": {
"properties": {
"id": {
"description": "game:cardId \u2014 a pokemontcg.io id, e.g. pokemon:sv3pt5-199",
"type": "string"
}
},
"required": [
"id"
],
"type": "object"
},
"queryParams": {
"properties": {
"denoms": {
"description": "comma list of USD EUR USDC EURC GBP JPY ETH SOL BTC; all when omitted",
"type": "string"
},
"on": {
"description": "YYYY-MM-DD you bought it; reports the corpus change since",
"type": "string"
},
"paid": {
"description": "your cost basis in USD; PnL is computed against it",
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}