Marketplace · API · x402

concordancehq.duckdns.org/tools/search

Full-text search across every aggregated data source in one call: news, SEC filings, court opinions, academic papers, government records, and developer discussions. One query surfaces everything concordant across independently-sourced, citable results -- not a single-source wrapper. Optional source/category/since filters.

Endpoint	`https://concordancehq.duckdns.org/tools/search`
Trust	100% uptime over 1 checks · ~292 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	2026-11-11T13:54:34.888Z

Use it

Call it (an x402 client pays automatically)

curl -i https://concordancehq.duckdns.org/tools/search
# 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-e39cf52529693158

Search the whole marketplace from your agent (MCP)

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