chess.stats

stable Standard

Fetch a Chess.com player's ratings and W/L/D records per time control.

GET /v1/chess/stats

What you get#

One Chess 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
`username`	string	yes	(required)	Chess.com username, e.g. hikaru	max 25 chars; must match `[a-z0-9_-]{3,25}`; trimmed, leading @ removed, lowercased

Request#

curl "https://api.onekey.dev/v1/chess/stats?username=hikaru" \
  -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 Chess response, recorded and returned in Onekey's shape. Fields the platform does not provide are null.

json

{
  "success": true,
  "data": {
    "ext": {
      "rapid": 2838,
      "blitz": 3469,
      "bullet": 3391,
      "daily": 2239,
      "fide": 2814,
      "tacticsBest": 2730,
      "puzzleRushBest": 123,
      "blitzWins": 35867,
      "blitzLosses": 5532,
      "blitzDraws": 4362
    }
  },
  "metadata": {
    "platform": "chess",
    "endpoint": "stats",
    "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
`chess_rapid.last.rating`	`ext.rapid`	`toNumber`
`chess_blitz.last.rating`	`ext.blitz`	`toNumber`
`chess_bullet.last.rating`	`ext.bullet`	`toNumber`
`chess_daily.last.rating`	`ext.daily`	`toNumber`
`fide`	`ext.fide`	`toNumber`
`tactics.highest.rating`	`ext.tacticsBest`	`toNumber`
`puzzle_rush.best.score`	`ext.puzzleRushBest`	`toNumber`
`chess_blitz.record.win`	`ext.blitzWins`	`toNumber`
`chess_blitz.record.loss`	`ext.blitzLosses`	`toNumber`
`chess_blitz.record.draw`	`ext.blitzDraws`	`toNumber`

Caching and freshness#

Fresh for about 30 minutes. Repeat calls in that window are served from cache and are free.
Between 30 minutes and 6 hours 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 1 day 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).