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GET /v1/meta

Spec

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/doppler-api

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

Get an API key

Code snippets

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

Example response

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

{
    "data": {
        "api": "doppler",
        "note": "Doppler-effect maths (acoustic + relativistic) — computed locally and deterministically, no key, no third-party service.",
        "endpoints": [
            "/v1/sound",
            "/v1/light",
            "/v1/radial-velocity",
            "/v1/meta"
        ],
        "speed_of_light_m_s": 299792458,
        "default_sound_speed_m_s": 343
    },
    "meta": {
        "timestamp": "2026-06-04T10:18:56.624Z",
        "request_id": "0acc23e4-6bde-41c8-b5be-2c4c8fc2ef56"
    },
    "status": "ok",
    "message": "Meta",
    "success": true
}