Marketplace · API · x402

sendcheck-x402.pennyforgeorg.workers.dev/check

SendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST {address, chain}

Endpoint	`https://sendcheck-x402.pennyforgeorg.workers.dev/check`
Trust	100% uptime over 1 checks · ~697 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	0x9504A5939AB5be2B2B1F8beA7D7ebeCcd96c485D
method	POST
last updated	2026-10-26T12:01:42.544Z

Use it

Call it (an x402 client pays automatically)

curl -i https://sendcheck-x402.pennyforgeorg.workers.dev/check
# 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-a5090b61410a647c

Search the whole marketplace from your agent (MCP)

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