Marketplace · API · x402

concordancehq.duckdns.org/tools/series

Tabular time-series lookup across economic indicators (FRED, World Bank, UN Comtrade), crypto TVL, weather, and stock quotes -- by source + series_id, with an optional date range.

Endpoint	`https://concordancehq.duckdns.org/tools/series`
Trust	100% uptime over 1 checks · ~511 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	0x1f5f8474fA0dc1Fde79187abd68Ef8Ea15ADAe34
method	POST
last updated	2026-11-06T21:33:01.09Z

Use it

Call it (an x402 client pays automatically)

curl -i https://concordancehq.duckdns.org/tools/series
# 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-a0e4f14fa518018b

Search the whole marketplace from your agent (MCP)

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