Marketplace · API · x402

unlisted.sh/diagnose

x402 Bazaar listing checker: finds why an x402 endpoint isn't showing up in the Coinbase CDP Bazaar. Checks its 402 challenge and discovery metadata and says what to fix. Use when your x402 endpoint isn't listed; add ?mode=paid for one real test payment (not charged if none is made).

Endpoint	`https://unlisted.sh/diagnose`
Trust	100% uptime over 1 checks · ~168 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0xE1122aE3bbFa33D6fF21c25692850Ca7A58A6740
method	POST
last updated	2026-11-07T23:34:42.121Z

Use it

Call it (an x402 client pays automatically)

curl -i https://unlisted.sh/diagnose
# 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/x402-152a54a588a059d8

Search the whole marketplace from your agent (MCP)

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