Paginación

curl -i "https://api.rail.cl/v1/accounts/acc_xxx/movements?per_page=10" \
  -H "Authorization: Bearer rail_sk_live_…"

HTTP/2 200
content-type: application/json
x-total-count: 238
link: <https://api.rail.cl/v1/accounts/acc_xxx/movements?per_page=10&page=2>; rel="next", <https://api.rail.cl/v1/accounts/acc_xxx/movements?per_page=10&page=24>; rel="last"

function parseLinkHeader(header: string): Record<string, string> {
  const links: Record<string, string> = {};
  for (const part of header.split(',')) {
    const m = part.trim().match(/^<(.+)>;\s*rel="(.+)"$/);
    if (m) links[m[2]] = m[1];
  }
  return links;
}

// Uso
const res = await fetch(url, { headers });
const links = parseLinkHeader(res.headers.get('link') ?? '');
console.log(links.next);  // → URL absoluta de la siguiente página
console.log(links.last);  // → URL absoluta de la última

async function fetchAllMovements(accountId: string, apiKey: string) {
  const all: Movement[] = [];
  let url: string | null = `https://api.rail.cl/v1/accounts/${accountId}/movements?per_page=200`;
  while (url) {
    const res = await fetch(url, {
      headers: { Authorization: `Bearer ${apiKey}` },
    });
    const page = await res.json();
    all.push(...page);
    const links = parseLinkHeader(res.headers.get('link') ?? '');
    url = links.next ?? null;
  }
  return all;
}

# Primer sync
curl "...?per_page=200&page=1"
# guarda el max(synced_at) de la response como cursor

# Sucesivos
curl "...?per_page=200&synced_since=<cursor>"