Marketplace · API · x402

api.agentmercantile.com/v1/x402-service-change-snapshot

Determine whether a previously accepted x402 service payment contract is still equivalent enough to proceed. Compares one live unpaid 402 challenge, using a caller-supplied GET or POST request shape, against a caller-held baseline bound to that request identity. Not uptime monitoring, a trust score, a webhook, a marketplace crawl, or a generic POST {} probe of every x402 resource.

Endpoint	`https://api.agentmercantile.com/v1/x402-service-change-snapshot`
Trust	100% uptime over 1 checks · ~1328 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	0xdb7b2b54f80479826222749a2ea73a8acc306e1e
method	POST
last updated	2026-10-25T19:18:06.687Z

Use it

Call it (an x402 client pays automatically)

curl -i https://api.agentmercantile.com/v1/x402-service-change-snapshot
# 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-a6d03fb07b2570ff

Search the whole marketplace from your agent (MCP)

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