Convert to FB2

curl https://api.switchfile.io/v1/convert \
  -H "Authorization: Bearer $SWITCHFILE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url":"https://example.com/input.doc","to":"fb2"}'

const res = await fetch("https://api.switchfile.io/v1/convert", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.SWITCHFILE_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({"url":"https://example.com/input.doc","to":"fb2"}),
});
console.log(await res.json());