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GET /v1/diff

Diff two JSON docs → patch

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/jsondiff-api

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

Get an API key

Code snippets

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

Example response

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

{
    "data": {
        "equal": false,
        "patch": [
            {
                "op": "replace",
                "path": "/y",
                "value": 3
            }
        ],
        "summary": {
            "added": 0,
            "changed": 1,
            "removed": 0
        },
        "merge_patch": {
            "y": 3
        },
        "patch_op_count": 1
    },
    "meta": {
        "timestamp": "2026-06-01T23:40:47.866Z",
        "request_id": "ea1a9f38-d23a-4bef-a69a-83823ec6e338"
    },
    "status": "ok",
    "message": "Diff computed",
    "success": true
}