invalid_parameter

curl -G https://api.opentype.dev/v1/usage \
  -H "Authorization: Bearer $OPENTYPE_API_KEY" \
  --data-urlencode "start_at=2026-09-01T00:00:00Z" \
  --data-urlencode "end_at=2026-10-01T00:00:00Z"

// Second precision, UTC, trailing Z: 2026-09-01T00:00:00Z
const toWire = (d: Date) => d.toISOString().replace(/\.\d{3}Z$/, "Z");

const params = new URLSearchParams({
  start_at: toWire(new Date(Date.UTC(2026, 8, 1))),
  end_at: toWire(new Date(Date.UTC(2026, 9, 1))),
});

const res = await fetch(`https://api.opentype.dev/v1/usage?${params}`, {
  headers: { Authorization: `Bearer ${process.env.OPENTYPE_API_KEY}` },
});

const body = await res.json();
if (!res.ok) throw new Error(`${body.error.code}: ${body.error.message}`);
console.log(body.spend.settled_micros);

import os
from datetime import datetime, timezone

import requests

def to_wire(dt: datetime) -> str:
    # Second precision, UTC, trailing Z: 2026-09-01T00:00:00Z
    return dt.astimezone(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ")

resp = requests.get(
    "https://api.opentype.dev/v1/usage",
    headers={"Authorization": f"Bearer {os.environ['OPENTYPE_API_KEY']}"},
    params={
        "start_at": to_wire(datetime(2026, 9, 1, tzinfo=timezone.utc)),
        "end_at": to_wire(datetime(2026, 10, 1, tzinfo=timezone.utc)),
    },
    timeout=30,
)

body = resp.json()
if not resp.ok:
    raise RuntimeError(f"{body['error']['code']}: {body['error']['message']}")
print(body["spend"]["settled_micros"])