The API, simply

# Upload a file, get a share link
curl -X POST https://clex.in/vault/api/uploads \
  -H "Authorization: Bearer $CLEX_API_KEY" \
  -H "X-Filename: report.pdf" \
  -H "X-Expires-In: 86400" \
  --data-binary @report.pdf

import os, requests

with open("report.pdf", "rb") as f:
    r = requests.post(
        "https://clex.in/vault/api/uploads",
        headers={
            "Authorization": f"Bearer {os.environ['CLEX_API_KEY']}",
            "X-Filename": "report.pdf",
        },
        data=f,
    )

r.raise_for_status()
print(r.json()["shareUrl"])

import { readFile } from 'node:fs/promises'

const res = await fetch('https://clex.in/vault/api/uploads', {
  method: 'POST',
  headers: {
    Authorization: `Bearer ${process.env.CLEX_API_KEY}`,
    'X-Filename': 'report.pdf',
  },
  body: await readFile('report.pdf'),
})

if (!res.ok) throw new Error(`upload failed: ${res.status}`)
console.log((await res.json()).shareUrl)