Quickstart

Every TKX endpoint is a static JSON document. There is nothing to install and no key to obtain — just make an HTTP GET.

Base URL

All endpoints live under:

https://tkx.org/api/v1/

Your first request

Fetch the model rankings — the cheapest verified offer for each ranked model:

curl https://tkx.org/api/v1/rankings.json

{
  "generatedAt": "2026-07-22T16:07:24.242Z",
  "attribution": "Data by TKX (https://tkx.org) — free use requires attribution",
  "rankings": [
    {
      "id": "gpt-5.5",
      "name": "gpt-5.5",
      "org": "azure_ai",
      "ctx": 1050000,
      "best": {
        "in": 5,
        "out": 30,
        "blended": 11.25,
        "router": "official",
        "provider": "azure_ai",
        "evidence": "official"
      },
      "avgBlended": 11.25,
      "providerCount": 5,
      "ttft": null,
      "tps": null,
      "uptime": null,
      "spark": [],
      "providers": [
        {
          "router": "official",
          "provider": "azure_ai",
          "in": 5,
          "out": 30,
          "ttft": null,
          "tps": null,
          "uptime": null,
          "evidence": "official"
        }
      ],
      "usage": {
        "tokens": 98987458250,
        "tokensPaid": 98987458250,
        "tokensFree": 0,
        "share": 1.03,
        "rank": 15,
        "usd": 1113608.91,
        "volChgPct": null,
        "spendChgPct": null
      }
    }
  ]
}

Response conventions

• Every response includes an attribution string and, where relevant, a generatedAt ISO-8601 timestamp (UTC).
• List payloads sit under a named key — rankings, data, events, clouds, etc. (see each endpoint).
• Prices are USD per 1M tokens unless a currency field says otherwise (GPU domestic leg is CNY). Missing/untested values are null — never estimated.
• Each offer carries an evidence tag — see Data model & evidence.

Freshness & caching

CORS & browsers

CORS is enabled, so you can fetch() directly from a browser:

const r = await fetch('https://tkx.org/api/v1/indices.json');
const { indices } = await r.json();
console.log(indices.TTPI.value); // 1.67