Skip to content
GET /v1/flatten

Flatten nested JSON to dot-notation

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/flatten-api

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

Get an API key

Code snippets

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

Example response

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

{
    "data": {
        "keys": 2,
        "flattened": {
            "a.b.c": 1,
            "list.0.x": 1
        }
    },
    "meta": {
        "timestamp": "2026-06-02T16:51:53.757Z",
        "request_id": "f15803e1-f8eb-46ed-b9ae-7a05bbbbe8fb"
    },
    "status": "ok",
    "message": "Flatten nested JSON",
    "success": true
}