Marketplace · API · x402

www.retcg.xyz/api/appraise/:id

Pokémon card appraisals, $0.02 a call in USDC on Arc, Base, Polygon or Solana. Raw and every PSA/BGS/CGC/SGC grade in 9 currencies, each with source, sample size and dates; set momentum, projections, PnL net of marketplace fees, break-even; EIP-712 signed. No basis, no number.

Endpoint	`https://www.retcg.xyz/api/appraise/:id`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~2285 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:5042
scheme	exact
pay to	0xb7e178E99130046B69761ED0871b52ea9fc6b38b
method	GET
last updated	2026-10-17T07:19:32.031Z

Use it

Call it (an x402 client pays automatically)

curl -i https://www.retcg.xyz/api/appraise/:id
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-fee35454a62b71df

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}