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GET /v1/search

Search isotopes

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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/isotopes-api

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Code snippets

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

Example response

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

{
    "data": {
        "count": 25,
        "query": "uranium",
        "total": 26,
        "isotopes": [
            {
                "z": 92,
                "name": "Uranium",
                "symbol": "U",
                "abundance": null,
                "atomic_mass": 217.02437,
                "mass_number": 217,
                "standard_atomic_weight": 238.02891
            },
            {
                "z": 92,
                "name": "Uranium",
                "symbol": "U",
                "abundance": null,
                "atomic_mass": 218.02354,
                "mass_number": 218,
                "standard_atomic_weight": 238.02891
            },
            {
                "z": 92,
                "name": "Uranium",
                "symbol": "U",
                "abundance": null,
                "atomic_mass": 219.02492,
                "mass_number": 219,
                "standard_atomic_weight": 238.02891
            },
            {
                "z": 92,
                "name": "Uranium",
                "symbol": "U",
                "abundance": null,
                "atomic_mass": null,
                "mass_number": 220,
                "standard_atomic_weight": 238.02891
            },
            {
                "z": 92,
                "name": "Uranium",
                "symbol": "U",
                "abundance": null,
                "atomic_mass": null,
                "mass_number": 221,
                "standard_atomic_weight": 238.02891
            },
            {
                "z": 92,
                "name": "Uranium",
                "symbol": "U",
                "abundance": null,
                "atomic_mass": null,
                "mass_number": 222,
                "standard_atomic_weight": 238.02891
            },
            {
                "z": 92,
                "name": "Uranium",
                "symbol": "U",
                "abundance": null,
                "atomic_mass": 223.02774,
                "mass_number": 223,
                "standard_atomic_weight": 238.02891
            },
            {
                "z": 92,
                "name": "Uranium",
                "symbol": "U",
                "abundance": null,
                "atomic_mass": 224.027605,
                "mass_number": 224,
                "standard_atomic_weight": 238.02891
            },
            {
                "z": 92,
                "name": "Uranium",
                "symbol": "U",
                "abundance": null,
                "atomic_mass": 225.029391,
                "mass_number": 225,
                "standard_atomic_weight": 238.02891
            },
            {
                "z": 92,
                "name": "Uranium",
                "symbol": "U",
                "abundance": null,
                "atomic_mass": 226.029339,
                "mass_number": 226,
                "standard_atomic_weight": 238.02891
            },
            {
                "z": 92,
               
…