/v1/meta
Spec
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10 free calls per day — no sign-up, no API key. Goes through the oanor gateway.
It works. Grab an API key and use it in your project.
Get an API keyCode snippets
curl "https://api.oanor.com/rtd-api/v1/meta" \ -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/rtd-api/v1/meta", {
headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/rtd-api/v1/meta");
curl_setopt($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/rtd-api/v1/meta",
headers={"x-oanor-key": "oanor_test_..."}
)
Example response
A real response from this endpoint, captured by the latest health check.
{
"data": {
"notes": "Ohms, °C. IEC 60751 Pt (α=0.00385): R = R₀(1+A·T+B·T²) [+C·(T−100)·T³ below 0]; A=3.9083e-3, B=−5.775e-7, C=−4.183e-12. Pt100 R₀=100 Ω, Pt1000 R₀=1000 Ω. For NTC thermistors use a thermistor API; for thermocouples a thermocouple API.",
"service": "rtd-api",
"endpoints": {
"GET /v1/meta": "This document.",
"GET /v1/tolerance": "Tolerance ±°C and ±Ω by accuracy class.",
"GET /v1/resistance": "Resistance from temperature (Callendar–Van Dusen).",
"GET /v1/temperature": "Temperature from a measured resistance."
},
"description": "RTD (Pt100/Pt1000) sensor maths: resistance↔temperature via Callendar–Van Dusen, and IEC 60751 tolerance bands."
},
"meta": {
"timestamp": "2026-06-07T08:18:00.782Z",
"request_id": "9da2281c-b5f8-4468-a32e-29c37506fff3"
},
"status": "ok",
"message": "Meta",
"success": true
}