Marketplace · API · x402

usaref.dev/v1/:country/:series/history

Past values of one government reference series for 10 North American countries: central-bank policy-rate decisions, VAT/GST and minimum-wage changes, statutory interest, CPI and tax-rate history, plus official FX reference rates where published. Each entry has its value, effective dates and official source. GET /v1/{country}/{series}/history, e.g. /v1/us/policy-rate/history.

Endpoint	`https://usaref.dev/v1/:country/:series/history`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~1244 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	0x1F0409ccD20A2fb497d4DeCeF4E17e9d0688FeA6
method	GET
last updated	2026-10-28T08:35:21.66Z

Use it

Call it (an x402 client pays automatically)

curl -i https://usaref.dev/v1/:country/:series/history
# 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-fc53b6a0a1ea7722

Search the whole marketplace from your agent (MCP)

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