Hardware & network requirements

SimplyPrint is a cloud service that can be used with any device that has a browser, as you interact with SimplyPrint via a web browser or our mobile app.

Any Browser-Capable Device

Computers, tablets, Chromebooks - anything that can run a web browser works with SimplyPrint.

Mobile Apps Available

Download our mobile apps for iOS and Android for on-the-go printer management.

iOS App Android App

There are different kinds of integrations to SimplyPrint, and it is determined by what printer you have and how it connects. The setup and whether hardware is required or not, depends on the printer. We support three main types of setups:

Best Source of Information

For detailed setup instructions specific to your printer model, visit our comprehensive Setup Guide - this is the best source of information for setup requirements.

1. Network Bridge Setup (one device for up to multiple printers)

Some printers like Bambu Lab, Ultimaker, Duet3D, Elegoo Centauri and others may require one device on your local network, that can connect locally to your printers, and then to our API.

Acts like a "bridge" between us and your printers
Used when we cannot install anything on the printer directly
Works with printers that are more "closed" like Bambu Lab or Elegoo Centauri
Requires printers to have a local "API" that allows communication on the same network
See the Network Requirements section for more details on network communication

2. Printer runs our software (built-in connection, no hardware required): Klipper & custom firmware

So-called "Klipper-powered" printers and newer printers running the "Klipper" firmware have more powerful hardware that can run our software on the printer and connect to the internet.

No external hardware needed - the printer itself connects to SimplyPrint
Built-in WiFi and processing power handles the connection
Some newer Prusa printers with our custom firmware installed also fall into this category

More info in our Klipper setup guide

3. Older Printers (External Hardware Required)

Older printers are "dumber" and may not have super powerful hardware: no WiFi, no Bluetooth or anything like that. In this case, external hardware is required.

Often times you'd need a Raspberry Pi (generally one per printer - 1 Pi for 4+ printers can be possible, but the setup is a bit more complex).
- Read our guide on which Raspberry Pi to pick for SimplyPrint Pi OS: Pick the right Raspberry Pi
- Can I use something other than a Raspberry Pi? Yes! But our software is optimized and shipped for Raspberry Pi, so we recommend it. Other devices may work, such as a Windows or Mac computer or any Linux-based device. An old Android phone or tablet can run OctoPrint through Octo4A. Learn more in our setup guide.
The Raspberry Pi connects to your printer via USB and to your network via WiFi/Ethernet
Acts as a bridge between your printer and SimplyPrint's cloud service
See the Network Requirements section for more details on network communication for SimplyPrint Pi OS setups

More info in our setup guide

Need Help Choosing?

This page provides an overview of the different setup types. For detailed information specific to the many hundreds of printers we support, visit our comprehensive Setup Guide.

Setup-Specific Network Requirements

Network Bridge Setup Communication

For setups using a network bridge (like with Bambu Lab, Ultimaker, Duet3D, Elegoo Centauri):

Our software (hosted on a device on your local network) needs to communicate directly with printers via their local IP addresses
Network administrators can restrict access by allowing specific MAC addresses or IPs if needed
This network configuration must be managed by you - SimplyPrint software does not handle static IPs or network permissions
The printers themselves (like Bambu Lab) often don't need internet access - they can be completely cut off from the internet as long as the device hosting our client has internet connection
The client's own web page is on port 8000 of the device running it (for example http://localhost:8000)
The client finds printers on your network automatically, but that discovery does not cross VLANs or separate Wi-Fi networks (SSIDs) - entering the printer's IP address by hand still works
When you add a printer, SimplyPrint can only detect it automatically if your browser and the device reach the internet from the same public IP address - otherwise, enter the printer's setup code

SimplyPrint Pi OS Setups

For SimplyPrint Pi OS setups with a Raspberry Pi connected via USB:

The Raspberry Pi doesn't necessarily need to talk to other local devices on the network when connected to the printer via USB
However, if you want to use an IP camera with your printer, the Raspberry Pi will need access to that camera's IP address
If the camera can't be accessed via "localhost" (i.e., it's not directly connected to the Raspberry Pi), you'll need to ensure the camera's IP is accessible
Both wired (Ethernet) and wireless (WiFi) connections are fully supported for connecting the Raspberry Pi to your network

What your network must allow

Outbound only: nothing needs to reach in, and nothing beyond these hosts. Rows marked optional can stay blocked; each says what stops working.

Download the whole allowlist (CSV)

Browsers (the computers people use)

Outbound only, over HTTPS; no inbound ports are needed. Any current browser works, Chromebooks included. Web filters and secure web gateways must allow simplyprint.io and its subdomains.

Host or address	Port	Protocol	Used for
`simplyprint.io`	443	HTTPS	The panel, sign-in and the API
`ws.simplyprint.io`	443	WSS (WebSocket)	Live printer status A long-lived connection: a proxy or filter that inspects or times it out leaves the panel without live data. How to fix it
`slicing.simplyprint.io`	443	HTTPS (server-sent events)	Slicing in the browser The host most often blocked: when everything works except slicing, this is why. Slicing streams its progress over one long HTTPS response, which filters and TLS inspection tend to buffer or cut. How to fix it
`cdn.simplyprint.io, cdn2.simplyprint.io, sp-cdn.fra1.digitaloceanspaces.com, sp-userfiles.fra1.digitaloceanspaces.com`	443	HTTPS	Print files, images and the app itself
`errors.simplyprint.io`	443	HTTPS	Optional Error reports from the browser Without it: We don't see errors in the browser, so they take longer to fix.
`challenges.cloudflare.com`	443	HTTPS	The bot check on the sign-in page
`help.simplyprint.io, client.crisp.chat`	443	HTTPS	Optional Help articles and the support chat Without it: No help articles or support chat inside the panel.

The computer that runs the SimplyPrint Client

Windows 10 or newer, macOS, Linux, a Raspberry Pi or Docker, on the same local network as the printers. Not a Chromebook, phone or tablet.

Host or address	Port	Protocol	Used for
`ws.simplyprint.io`	443	WSS (WebSocket)	The connection the Client keeps open
`api.simplyprint.io, simplyprint.io`	443	HTTPS	API calls and file transfers
`download.simplyprint.io`	443	HTTPS	Installers and signed Client updates TLS inspection can break the signature check on updates.
`cdn.simplyprint.io, cdn2.simplyprint.io, sp-cdn.fra1.digitaloceanspaces.com, sp-userfiles.fra1.digitaloceanspaces.com`	443	HTTPS	Print files
`*.ingest.us.sentry.io`	443	HTTPS	Optional Error reports from the Client Without it: We don't see the Client's errors, so they take longer to fix.
`localhost`	8000	HTTP	The Client's own page, on the computer itself

Printers on the local network

The Client connects to the printers on these ports (TCP, from the Client to the printer). Discovery uses multicast (mDNS 224.0.0.251:5353, SSDP 239.255.255.250 on 1900 and 2021), which does not cross VLANs or a separate IoT network; adding a printer by its IP address still works.

Host or address	Port	Protocol	Used for
`Bambu Lab`	8883, 990, 322, 6000	MQTT/TLS, FTPS, RTSP	Printer control, file transfer and camera
`Prusa, Duet, Ultimaker`	80	HTTP	The printer's local API
`Dremel`	80, 10123	HTTP	The printer's local API and camera
`Klipper / Moonraker, Snapmaker, QIDI`	7125	HTTP, WebSocket	The printer's local API
`Creality`	9999, 80, 7125, 8000, 1984, 8080	WebSocket, HTTP	The printer's local API and camera
`Anycubic`	9883, 18910, 18088	MQTT, HTTP	The printer's local API
`Elegoo`	3030, 1883, 52700 (UDP), 8080	WebSocket, MQTT, HTTP	The printer's local API and camera
`Flashforge`	8898, 8899, 19000 (UDP), 48899 (UDP), 8080	TCP, HTTP	The printer's local API and camera

Printers that connect by themselves

Klipper, OctoPrint and Prusa printers with SimplyPrint built in connect out on their own, without the Client.

Host or address	Port	Protocol	Used for
`ws.simplyprint.io, api.simplyprint.io`	443	WSS, HTTPS	Klipper (Moonraker) and the OctoPrint plugin
`cdn.simplyprint.io, cdn2.simplyprint.io, sp-cdn.fra1.digitaloceanspaces.com, sp-userfiles.fra1.digitaloceanspaces.com`	443	HTTPS	Print files (Klipper and OctoPrint)
`ai.simplyprint.io`	443	HTTPS	Optional Print failure detection (OctoPrint plugin) Without it: No print failure detection on OctoPrint printers.
`github.com`	443	HTTPS	Optional Installing and updating the OctoPrint plugin Without it: The OctoPrint plugin can't install or update itself; install updates by hand.
`prusa.simplyprint.io`	443	HTTPS	Prusa printers with SimplyPrint firmware The firmware trusts one built-in certificate authority, so TLS inspection on this host breaks it.

Email

Invitations and password resets must reach people. Account email is sent through ZeptoMail (Zoho) and newsletters through Amazon SES, both on our sub-processor list. If your filter quarantines new senders, allow these.

Host or address	Port	Protocol	Used for
`[email protected]`	—	SMTP	The sender of every account email
`bounce.simplyprint.io`	—	SMTP	The return path (bounces)
`simplyprint.io/api/email/ec`	—	HTTPS	Links in our emails pass through this address. Link scanners may open it; that is safe

Wi-Fi & Ethernet Recommendations

Both Ethernet and Wi-Fi are fully supported - wired connections often provide more stability for critical setups
WPA2 networks work best - most compatible with devices like Raspberry Pi
2.4GHz preferred - some devices like Raspberry Pi can have trouble with 5GHz
Enterprise networks may not work - networks requiring SSID + username/password can be problematic
Avoid open networks - unsecured networks are strongly discouraged for security reasons

Separate Network & Internet Requirements

Printers can be on a separate network - SimplyPrint only needs to be on the same network as your printers, which can be isolated from your main network
Printers often don't need internet access - many printers (like Bambu Lab) can be completely cut off from the internet, as long as the device hosting our client has internet connection
Only the bridge device needs internet - the device running SimplyPrint software needs internet access to communicate with our servers, but your printers may not

Connection Method

SimplyPrint uses outbound connections only, which means:

Your devices (Raspberry Pi, etc.) connect TO our servers
We don't connect back to your devices
No inbound firewall rules typically required
Uses standard web requests and WebSocket connections
Same connection method as browsing websites

Setup Guide

Comprehensive guides for hundreds of supported printers:

Visit Setup Guide

Technical Support

Need help with network configuration or hardware setup:

Visit Help Center

Hardware & Network Requirements

Hardware requirements and network configuration for accessing and connecting printers to SimplyPrint.

Hardware to Access SimplyPrint