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GET /v1/compression

Compression ratio

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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/engine-api

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Code snippets

curl "https://api.oanor.com/engine-api/v1/compression" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/engine-api/v1/compression", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/engine-api/v1/compression");
curl_setopt($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/engine-api/v1/compression",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

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

{
    "data": {
        "note": "Compression ratio = (swept + clearance) / clearance. Higher CR raises efficiency but needs higher-octane fuel.",
        "inputs": {
            "swept_volume_cc": 499.5572
        },
        "compression_ratio": 10,
        "clearance_volume_cc": 55.5064,
        "compression_ratio_label": "10:1"
    },
    "meta": {
        "timestamp": "2026-06-05T03:09:03.151Z",
        "request_id": "96c33e2c-b5ae-45b7-a092-7466081d1c91"
    },
    "status": "ok",
    "message": "Compression ratio",
    "success": true
}