Spec

Code snippets

curl "https://api.oanor.com/sixsigma-api/v1/meta" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/sixsigma-api/v1/meta", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/sixsigma-api/v1/meta");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);

import requests
requests.get(
    "https://api.oanor.com/sixsigma-api/v1/meta",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "notes": "Sigma level uses the conventional 1.5σ long-term shift (override with 'shift'). Capability DPMO is the long-term normal tail without the shift. For general statistics use a statistics API.",
        "service": "sixsigma-api",
        "endpoints": {
            "GET /v1/dpmo": "DPMO, yield and sigma level from defects/units/opportunities or a yield.",
            "GET /v1/meta": "This document.",
            "GET /v1/yield": "Rolled throughput yield, normalized yield and total DPU from step yields or DPU.",
            "GET /v1/capability": "Cp, Cpk, Cpu, Cpl and expected DPMO/yield from mean, sigma and spec limits."
        },
        "description": "Six Sigma quality maths: process capability (Cp, Cpk, Pp, Ppk), DPMO & sigma level, and rolled throughput yield."
    },
    "meta": {
        "timestamp": "2026-06-05T21:48:49.163Z",
        "request_id": "9291c475-f771-4ff9-aad2-7636f64b1feb"
    },
    "status": "ok",
    "message": "Meta",
    "success": true
}