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GET /v1/eseries

Nearest preferred value

Try it live

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

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

It works. Grab an API key and use it in your project.

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Code snippets

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

Example response

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

{
    "data": {
        "ohms": 4800,
        "lower": 4300,
        "higher": 5100,
        "series": "E24",
        "error_percent": -2.083,
        "nearest_formatted": "4.7 kΩ",
        "nearest_preferred": 4700
    },
    "meta": {
        "timestamp": "2026-06-03T17:42:16.570Z",
        "request_id": "6b8fdfc4-51a1-4718-a542-06a2469acfd9"
    },
    "status": "ok",
    "message": "E-series",
    "success": true
}