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GET /v1/beer-lambert

A = ε·c·l solver

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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/beerlambert-api

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Code snippets

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

Example response

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

{
    "data": {
        "note": "A = ε·c·l.",
        "absorbance": 0.622,
        "solved_for": "absorbance",
        "path_length": 1,
        "concentration": 0.0001,
        "transmittance": 0.23878113,
        "molar_absorptivity": 6220,
        "percent_transmittance": 23.878113
    },
    "meta": {
        "timestamp": "2026-06-04T10:18:58.045Z",
        "request_id": "762920ab-fb41-40ff-9083-6eb3decff34d"
    },
    "status": "ok",
    "message": "A = ε·c·l solver",
    "success": true
}