commons.file_info

stable Standard

Wikimedia Commons file: URL, size, license and description.

GET /v1/commons/file_info

What you get#

One Commons record in Onekey's unified shape, in data. If the record does not exist you get a 404 not_found and are not charged.

What it costs#

Standard · 1 credit for a fresh fetch, charged only when it succeeds.
Free when served from cache (0.2 credit for a cached response over 100 KB).
Free if the request is invalid (never charged) or the source fails or reports not found (refunded).

Parameters#

Name	Type	Required	Default	What it is	Constraints
`name`	string	yes	(required)	File name without File: prefix	max 200 chars; must match `[^\x00-\x1f\x7f\|/:]{1,200}`; trimmed, repeated spaces collapsed

Request#

curl "https://api.onekey.dev/v1/commons/file_info?name=Alan%20turing%20header.jpg" \
  -H "x-api-key: YOUR_API_KEY"

Try it

Add your key to run this call right here. No key? Get one free. The key stays in this tab.

Recorded response#

A real Commons response, recorded and returned in Onekey's shape. Fields the platform does not provide are null.

json

{
  "success": true,
  "data": {
    "content": {
      "id": "158923803",
      "title": "File:Alan turing header.jpg",
      "text": "Photograph portrait of Alan Turing, taken on 29 March 1951."
    },
    "media": {
      "url": "https://upload.wikimedia.org/wikipedia/commons/c/ce/Alan_turing_header.jpg?utm_source=commons.wikimedia.org&utm_campaign=imageinfo&utm_content=original",
      "thumbnailUrl": "https://thumb.wikimedia.org/wikipedia/commons/thumb/c/ce/Alan_turing_header.jpg/330px-Alan_turing_header.jpg?utm_source=commons.wikimedia.org&utm_campaign=imageinfo&utm_content=thumbnail",
      "width": 752,
      "height": 1002,
      "mimeType": "image/jpeg",
      "sizeBytes": 143128
    },
    "package": {
      "license": "Public domain"
    },
    "author": {
      "displayName": "Elliott & Fry"
    }
  },
  "metadata": {
    "platform": "commons",
    "endpoint": "file_info",
    "cached": false,
    "stale": false,
    "age_s": 0,
    "fetched_at": "2026-01-01T12:00:00+00:00",
    "credits_charged": 1,
    "request_id": "7f3a9c2e5b1d4c8fa2e6d0b9c4f18e37"
  },
  "error": null
}

Field mapping#

How this endpoint's source fields become Onekey's unified schema. Fields the source lacks come back as null.

Source path	Onekey field	Transform
`pageid`	`content.id`	`toString`
`title`	`content.title`	-
`imageinfo.0.url`	`media.url`	`safeUrl`
`imageinfo.0.thumburl`	`media.thumbnailUrl`	`safeUrl`
`imageinfo.0.width`	`media.width`	`toNumber`
`imageinfo.0.height`	`media.height`	`toNumber`
`imageinfo.0.mime`	`media.mimeType`	-
`imageinfo.0.size`	`media.sizeBytes`	`toNumber`
`imageinfo.0.extmetadata.ImageDescription.value`	`content.text`	`stripHtml`
`imageinfo.0.extmetadata.LicenseShortName.value`	`package.license`	-
`imageinfo.0.extmetadata.Artist.value`	`author.displayName`	`stripHtml`

Caching and freshness#

Fresh for about 1 hour. Repeat calls in that window are served from cache and are free.
Between 1 hour and 1 day the cached copy is still served instantly and marked stale: true while Onekey refreshes it in the background.
If the source is down when a refresh is needed, the last copy can be served for up to 3 days more (marked stale).
A "not found" is remembered for 5 minutes and is free.
The cache is shared across all customers, which is what keeps repeat calls cheap.

What can go wrong#

Status	Code	What to do
401	`unauthorized`	Check the `x-api-key` header.
402	`insufficient_credits`	Add credits; your balance must cover the price.
404	`not_found`	That record does not exist. Free; do not retry.
422	`invalid_params`	Fix the parameters using the table above. Free.
429	`rate_limited`	Wait `Retry-After` seconds, then retry.
502	`upstream_error`	The source failed. Refunded; retry with backoff.

See Errors for the full list and retry guidance.

Status: stable (verified against the live source).