canary.countersignpay.com/v1/base/head

Current Base mainnet block height and base fee per gas in wei, read from the chain at request time

Endpoint	`https://canary.countersignpay.com/v1/base/head`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~303 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	0xa0f3c29f25778dDf46fce2cAB5f7e7C25E6a1451
method	GET
last updated	2026-11-11T03:52:51.558Z

Use it

Call it (an x402 client pays automatically)

curl -i https://canary.countersignpay.com/v1/base/head
# 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-b8fe4be4db11fe1b

Search the whole marketplace from your agent (MCP)

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