Marketplace · API · x402

ca-tax-api-mainnet.lxtap.workers.dev/eth/allowance

ERC-20 allowance on Ethereum: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now. Errors return 4xx/5xx JSON and aren't charged.

Endpoint	`https://ca-tax-api-mainnet.lxtap.workers.dev/eth/allowance`
Trust	Not checked yet
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0x2ECB9E1fcca7A62758c679F11bC3241466d181d8
method	GET
last updated	2026-11-14T00:12:04.625Z

Use it

Call it (an x402 client pays automatically)

curl -i https://ca-tax-api-mainnet.lxtap.workers.dev/eth/allowance
# 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/x402-16662c7fde36a56d

Search the whole marketplace from your agent (MCP)

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