Marketplace · API · x402

fiatdock.com/v1/chain/usdc-balance

USDC balance of any address on Base — the x402 settlement asset (atomic + USDC). Pay-per-call via x402. An empty body is answered for the wallet that pays on Base (the payment's signer); send {"address":"0x…"} for any other address.

Endpoint	`https://fiatdock.com/v1/chain/usdc-balance`
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	0xeB12bB2f52EeD33DBa6A00774E48324032Fd87C6
method	POST
last updated	2026-11-09T05:27:08.823Z

Use it

Call it (an x402 client pays automatically)

curl -i https://fiatdock.com/v1/chain/usdc-balance
# 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/x402-98ead3556b347850

Search the whole marketplace from your agent (MCP)

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

Wallet balances (EVM) (AIPayGen)
API$0.001/call

fiatdock.com/v1/chain/usdc-balance

Use it

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