Peak impact force

Code snippets

curl "https://api.oanor.com/climbing-api/v1/impact-force" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/climbing-api/v1/impact-force", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/climbing-api/v1/impact-force");
curl_setopt($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/climbing-api/v1/impact-force",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

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

{
    "data": {
        "note": "Peak impact force from the rope's spring model: F = mg + √((mg)² + 2·mg·k·f), with k the rope modulus (~20 kN for a dynamic single rope) and f the fall factor — so it depends on the fall factor, not the rope length. The top runner sees roughly 1.66× this from the pulley effect at the carabiner. A softer (lower-modulus) rope catches gentler.",
        "inputs": {
            "fall_factor": 1,
            "climber_mass_kg": 80,
            "rope_modulus_kn": 20
        },
        "peak_force_n": 6441,
        "peak_force_kn": 6.44,
        "force_on_top_piece_kn": 10.69
    },
    "meta": {
        "timestamp": "2026-06-06T15:30:43.193Z",
        "request_id": "6cd878cc-f168-4ae6-b2af-7486852be439"
    },
    "status": "ok",
    "message": "Impact force",
    "success": true
}