Marketplace · API · x402

api.cardhedger.com/v1/agent/cards/comps

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)

Endpoint	`https://api.cardhedger.com/v1/agent/cards/comps`
Trust	Not checked yet
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0x0667e5908e4e91b677ce45ca030db4c2aab21421
method	POST
last updated	2026-11-14T03:21:27.409Z

Use it

Call it (an x402 client pays automatically)

curl -i https://api.cardhedger.com/v1/agent/cards/comps
# 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-affd890f1dcd982a

Search the whole marketplace from your agent (MCP)

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