CloudBox documentation

Everything you can do with CloudBox — send files, keep a private cloud drive, connect your AI, and back up programmatically over an API. UK‑hosted, zero‑knowledge, never‑down.

Overview

CloudBox is a UK‑based, zero‑knowledge cloud. Four things live here:

Send — encrypt and send files up to 2 GB, free, no account.
Drive — a private encrypted cloud drive at drive.cloudbox.biz.
AI Connectors — let Claude, ChatGPT, Gemini & other MCP apps read, search and save your files.
Storage API — a key‑authenticated object API for apps and backups.

Where	URL
Website & Send	`cloudbox.biz`
Your Drive	`drive.cloudbox.biz`
API / AI endpoint	`app.cloudbox.biz`

Send a file

No account needed. Files are encrypted in your browser before they leave your device.

Go to cloudbox.biz → Send, choose a file (up to 2 GB) and enter your email.
Pick Create link (just a link) or Send email (also opens your mail app to the recipient).
Enter the 6‑digit code we email you (this verifies your address).
You get a share link that works for 3 days. Copy link or Email it.

Zero‑knowledge: the decryption key is inside the link (after the #), which never reaches our servers. Only someone with the full link can open the file.

Create an account

Free (5 GB)

Send a file (above). On the "Ready to share" screen, click Create my free account.
Choose a password (8+ characters; common/breached passwords are rejected).
Your Drive is created instantly. Sign in at drive.cloudbox.biz with your email and password.

Paid plans

Go to Pricing, choose a plan (or Build‑your‑own), and check out. Your account is provisioned automatically and a welcome email gives you sign‑in details. Plans start from £0.99/month.

Every account is a private Drive. You always sign in at drive.cloudbox.biz.

Your Drive

The Drive is your encrypted cloud storage — upload, organise, sync across devices, and share. Sign in at drive.cloudbox.biz. Desktop and mobile sync apps are available from the Drive itself.

Connect your AI

Give Claude, ChatGPT, Gemini, Copilot — or any MCP client — access to a private AI folder, so your assistant can read, search and save your files live.

In your AI app, add a custom connector / MCP server with the URL:

https://app.cloudbox.biz/mcp

Sign in with the email code, and choose read or read + write.
Your assistant can now list_files, read_file, search, and (with write) save_file in your AI folder.

Only files you put in an AI folder are shared. Private files and encrypted transfers stay zero‑knowledge. Full per‑app steps: cloudbox.biz/connectors.

Add files to an AI folder

Mobile / one‑time link & QR

Ask your assistant to create an upload link, or make one from your dashboard. Open it on a phone (or scan the QR) and upload — the file lands in the AI folder and is instantly readable/searchable by your AI.

Email‑to‑vault

Each AI folder can have a private email address. Forward or send attachments to it and they file themselves into the folder automatically — great for receipts and documents.

Storage API

A key‑authenticated object API for apps, integrations and automated backups. Every write is failover‑backed (mirrored across sites), so it stays up even during a storage outage.

Authentication

You get a key ID (public, cbk_…) and a secret (cbs_…). Send the secret as a bearer token — there is no username/password login; the API is used from code.

Authorization: Bearer cbs_your_secret_here

Base URL

https://app.cloudbox.biz/api/v1

Endpoints

Method	Path	Purpose
PUT	`/objects/{path}`	Upload / overwrite an object (up to 256 MB)
GET	`/objects/{path}`	Download an object
DEL	`/objects/{path}`	Delete an object
GET	`/objects?prefix=`	List objects
GET	`/whoami`	Key info + usage

Examples

SECRET="cbs_...."
BASE="https://app.cloudbox.biz/api/v1"

# upload
curl -X PUT "$BASE/objects/backups/db-2026-07-19.sql.gz" \
     -H "Authorization: Bearer $SECRET" \
     --data-binary @db-2026-07-19.sql.gz

# list
curl -H "Authorization: Bearer $SECRET" "$BASE/objects?prefix=backups/"

# download
curl -H "Authorization: Bearer $SECRET" \
     "$BASE/objects/backups/db-2026-07-19.sql.gz" -o restore.sql.gz

Need an API key? Contact hello@cloudbox.biz. (A self‑serve key portal is coming.)

Backups

Push backups to CloudBox over the Storage API and automate them with cron:

# nightly database backup at 02:30
30 2 * * * curl -sf -X PUT \
  "https://app.cloudbox.biz/api/v1/objects/backups/db-$(date +\%F).sql.gz" \
  -H "Authorization: Bearer cbs_...." \
  --data-binary @/var/backups/db.sql.gz >> /var/log/cbx-backup.log 2>&1

Because the API is failover‑backed, your backups are mirrored across sites automatically. For very large archives, ask us about a dedicated WebDAV/rclone target.

Support

Questions or issues? Email hello@cloudbox.biz and we'll pick it up as a support ticket. Team accounts get a shared inbox and ticket history.

Security & privacy

Zero‑knowledge transfers. Files you Send are encrypted in your browser; the key lives in the link, never on our servers — we can't read them.
UK‑hosted & GDPR. Your data is stored in the United Kingdom, GDPR compliant by default.
You hold the keys. Only files you deliberately put in an AI folder are readable, and only by the assistants you connect.
Never‑down. AI folders and Storage‑API objects are mirrored across sites with automatic failover — if one node goes down, another takes over instantly.

FAQ

How large a file can I send for free?

Up to 2 GB per transfer, no account, encrypted in your browser.

How do I create an account?

Send a file, then click "Create my free account" and pick a password — or buy a plan on Pricing.

Is CloudBox cheaper than Google One or iCloud?

Yes — storage from £0.99/month, cheaper at every tier, and zero‑knowledge.

Can CloudBox read my files?

No. Private files and transfers are zero‑knowledge. Only AI‑folder files are readable, and only by the AIs you connect.