Append a snapshot to the rolling index

Diff one snapshot against the previous index entry and append the result to rolling_index.json.

Called by n8n after each scrape. Re-appending a snapshot already in the index replaces its entry in place.

Append a snapshot to the rolling index

cURL

curl --request POST \
  --url https://scraper.example.com/append-index \
  --header 'Content-Type: application/json' \
  --header 'X-Webhook-Secret: <api-key>' \
  --data '
{
  "date": "2026-06-05",
  "time": "153000"
}
'

422

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}

Authorizations

X-Webhook-Secret · string · header · required

Shared secret configured as WEBHOOK_SECRET on the scraper and as a Header Auth credential in n8n.

Body

application/json

date · string · required

Snapshot date, YYYY-MM-DD.

Example:

"2026-06-05"

time · string · required

Snapshot time, HHMMSS.

Example:

"153000"

Response

200

application/json

Successful Response