Marketplace · API · x402

app.heinrichstech.com/v1/cdp/echo

BitBooth echo endpoint — pays a tiny USDC fee, returns a JSON echo. Reference implementation of the x402 + CDP Facilitator + Bazaar discovery loop.

Endpointhttps://app.heinrichstech.com/v1/cdp/echo
Trust✓ Verified callable · 100% uptime over 1 checks · ~628 ms
PricingPay per call with x402, no account. Call it to get an exact quote before paying.
networkeip155:8453
schemeexact
pay to0xDa2F35d283c42dd60B965322394bc658a5c1769F
methodPOST
last updated2026-11-11T16:16:30.952Z

Use it

Call it (an x402 client pays automatically)

curl -i https://app.heinrichstech.com/v1/cdp/echo
# 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/x402-37898ec50d4e5f75

Search the whole marketplace from your agent (MCP)

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