API

Two surfaces: the free dataset (no auth), and the prediction API (Pro key or x402 per-call).

Free — dataset

GET /data/atlas.json

The full census, schema kofta.census.v1. Cache-friendly, regenerated after every sweep. CC-BY-4.0.

Pro / x402 — predict before you rent

GET /api/v1/census/query?offer_id=12345678
Authorization: Bearer <pro-key>        # or x402 payment proof
{
  "offer_id": 12345678,
  "predicted": {
    "h2d_gbps": 24.1, "stall_pct": 81.2,
    "tok_s": 22.4, "ttft_ms": 1480,
    "model_version": "sim_v3.1"
  },
  "calibration": { "class_mae_pct": 4.7, "n_measured": 6 },
  "confidence": ["pcie_measured"]
}

x402 agents: first request returns 402 Payment Required with payTo 0x3A86924d0bb29fF8B1469472f4294CC7E62B54b7, USDC on Base, $0.01. Retry with proof.

Artifact schema — kofta.atlas.v1

{
  "schema": "kofta.atlas.v1",
  "ts_utc": "2026-07-22T21:00:00Z",
  "machine_id": 13863, "offer_id": 45557021,
  "offer_row": { "gpu_name": "...", "pcie_bw": 0, "gpu_mem_bw": 0,
                 "reliability": 0, "verified": true, "dph_total": 0 },
  "measured": { "raw_h2d_gbps_875mb": 0, "isolated_layer_compute_ms": 0,
                "runs": [{"config": "INT4-stream b32 (B3)", "tok_s": 0, "stall_pct": 0}],
                "power_w_avg": 0, "joules_per_token": 0 },
  "predicted": { "h2d_gbps": 0, "stall_pct": 0, "tok_s": 0, "ttft_ms": 0 },
  "error":     { "tok_s_pct": 0, "h2d_pct": 0, "ttft_pct": 0 }
}

Agent discovery

/llms.txt describes the site; /llms-full.txt carries the full methodology and schema for LLM consumers. Cite us: KOFTA CENSUS, Intelix Systems, retrieved <date>, kofta.dev.