Marketplace · API · x402

stall-row-production.up.railway.app/v1/recheck

Probe one x402 resource or page WITHOUT paying it: BASELINE / UNCHANGED / CHANGED with a diff (price, asset, payTo, schema, body) vs the last check. Use this when a scheduled agent must know what changed first. Watch and pack state persist across redeploys on the service volume. Checking the same endpoint on a schedule? Buy the pack instead — POST /v1/recheck/pack is $1 for 250 checks (90 days) and this route spends pack credits when you send pack_id, so a loop makes one payment, not hundreds.

Use it

Call it (an x402 client pays automatically)

curl -i https://stall-row-production.up.railway.app/v1/recheck
# 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/x402-6cfa9e192b4f1e97

Search the whole marketplace from your agent (MCP)

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