Marketplace · API · x402

stormap.ai/x402/v1/check_before_paying

Use when an agent is about to pay an x402 endpoint, seller domain or wallet it has not used before. Returns ok_to_pay, caution, dont_pay or no_payment_needed with reasons: live payment terms, its Coinbase Bazaar listing and paying wallets in 30 days, whether the live pay-to address matches the listing, real-USDC check, price vs. similar tools, and seller domain age. Read-only: never pays or signs. Optional amount_usd. Errors: 400 bad_input. Failed calls are not charged.

Endpoint	`https://stormap.ai/x402/v1/check_before_paying`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~179 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	0x1260d8d1fd47e22416156b72ee75e97986f8ba70
method	GET
last updated	2026-10-27T10:13:28.963Z

Use it

Call it (an x402 client pays automatically)

curl -i https://stormap.ai/x402/v1/check_before_paying
# 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/x402-6e23ac329391127d

Search the whole marketplace from your agent (MCP)

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