Skip to content
oanor
Sign up free
Marketplace Pricing Features Sign in
GET /v1/isotope

Isotope by label or symbol+mass

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/isotopes-api

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

Get an API key

Code snippets

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

Example response

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

{
    "data": {
        "isotope": {
            "z": 92,
            "name": "Uranium",
            "symbol": "U",
            "abundance": 0.992742,
            "atomic_mass": 238.0507882,
            "mass_number": 238,
            "standard_atomic_weight": 238.02891
        }
    },
    "meta": {
        "timestamp": "2026-06-09T03:03:47.430Z",
        "request_id": "d0d5317d-c023-4067-bbf1-e0a0517b9c09"
    },
    "status": "ok",
    "message": "Isotope retrieved successfully",
    "success": true
}