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GET /v1/layer

Single-material R-value

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10 free calls per day — no sign-up, no API key. Goes through the oanor gateway.

Custom headers (optional)
api.oanor.com/uvalue-api

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Code snippets

curl "https://api.oanor.com/uvalue-api/v1/layer" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/uvalue-api/v1/layer", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/uvalue-api/v1/layer");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);
import requests
requests.get(
    "https://api.oanor.com/uvalue-api/v1/layer",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "formula": "R = thickness / conductivity.",
        "material": "mineral_wool",
        "thickness_m": 0.1,
        "u_value_w_m2k": 0.35,
        "r_value_imperial": 16.22361,
        "conductivity_w_mk": 0.035,
        "r_value_rsi_m2k_w": 2.857143
    },
    "meta": {
        "timestamp": "2026-06-04T10:18:50.493Z",
        "request_id": "2ff30a82-0692-4ee5-bd7e-196b02ca0987"
    },
    "status": "ok",
    "message": "Single-material R-value",
    "success": true
}