Marketplace · API · x402

mart402.com/v1/jp-crypto-tax

Japan crypto-asset tax: realized income under the NTA total-average or moving-average method (sell/spend/exchange as disposals, fees deductible, opening balances). Verified against the official NTA FAQ examples to the yen. Max 300 transactions per call. $0.05/call.

Endpoint	`https://mart402.com/v1/jp-crypto-tax`
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	0xE3244a21D0d68bFa78b7CAd8C3b8777aDFbB3188
method	POST
last updated	2026-11-03T05:31:02.146Z

Use it

Call it (an x402 client pays automatically)

curl -i https://mart402.com/v1/jp-crypto-tax
# 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-a436dda33427d105

Search the whole marketplace from your agent (MCP)

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