register derived

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {
      "q": "stablecoin",
      "agency": "securities and exchange commission"
    }
  },
  "output": {
    "type": "json",
    "errors": {
      "400": {
        "example": {
          "error": "q parameter required"
        },
        "description": "Invalid or missing parameter(s) — required: q. Returned before the payment gate on paid requests, so a malformed call is never charged. JSON body: { error: <what is wrong and how to fix it> } plus usage hints."
      },
      "402": {
        "description": "Payment required — x402 v2 challenge; the accepts array lists scheme, network, and amount. Retry the same request with a PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Verification is free."
      },
      "500": {
        "example": {
          "error": "upstream_failed"
        },
        "description": "Unexpected server error. If a payment settled without a usable result, contact info@theaslangroupllc.com with the settlement tx hash for a re-run or credit."
      }
    },
    "example": {
      "mode": "search",
      "returned": 2,
      "documents": [
        {
          "type": "Proposed Rule",
          "title": "Stablecoin Reserve Requirements",
          "effective_on": null,
          "document_number": "2026-12345",
          "publication_date": "2026-06-12",
          "comments_close_on": "2026-09-08"
        }
      ],
      "deterministic": true
    }
  }
}