Marketplace · API · x402

ontarioprotocol.com/api/x402/base/balances

Base wallet balance: ETH, USDC and about 25 widely held Base tokens for any address, plus up to 20 ERC-20 token contracts you name, each with symbol, decimals, raw and formatted amount and the block number read, live from Base mainnet RPC. Required: address. $0.002 USDC on Base. Failed read, no charge. No account, no API key. Base mainnet only; no prices or USD values; tokens outside the list and your extras are not discovered.

Endpoint	`https://ontarioprotocol.com/api/x402/base/balances`
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	0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec
method	GET
last updated	2026-11-10T03:32:04.904Z

Use it

Call it (an x402 client pays automatically)

curl -i https://ontarioprotocol.com/api/x402/base/balances
# 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/x402-56def4180af76eea

Search the whole marketplace from your agent (MCP)

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