Rope length at a number of layers

Code snippets

curl "https://api.oanor.com/winch-api/v1/length-at-layer" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/winch-api/v1/length-at-layer", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/winch-api/v1/length-at-layer");
curl_setopt($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/winch-api/v1/length-at-layer",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

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

{
    "data": {
        "note": "The rope wound on the drum after a given number of full layers — handy for marking the rope or knowing how much is out: it is the same layer-by-layer sum as the full capacity, stopped at the layers you have spooled. Subtract it from the total length to know how much line is deployed, useful for reach and for staying off the last few drum wraps that must always remain anchored.",
        "inputs": {
            "layers_wound": 5,
            "drum_width_in": 12,
            "rope_diameter_in": 0.5,
            "barrel_diameter_in": 10
        },
        "rope_length_ft": 392.7,
        "turns_per_layer": 24
    },
    "meta": {
        "timestamp": "2026-06-07T08:17:57.152Z",
        "request_id": "9f9254a9-50fd-4418-9aa6-30314aff7e0e"
    },
    "status": "ok",
    "message": "Length at layer",
    "success": true
}