How to get your myenergi API key for your Zappi charger

If you are adding a Zappi EV charger to 1app.energy, you will be asked for two things from your myenergi account:

1. Your hub serial number
2. Your myenergi API key

This guide walks through exactly how to get both. It takes about two minutes.

Before you start

A few things that catch people out:

• Use the original account. The API key can only be generated from the myaccount that was used to register your myenergi devices. If a friend, installer, or family member set the system up under their email, you will need to either log in as them or have them generate the key for you. Shared logins will not show the option.
• You need a hub. The API key is tied to your gateway device — usually a myenergi Hub, or a newer Zappi/Eddi/Libbi with built-in Ethernet or WiFi acting as the gateway.
• Generating a new key cancels the old one. If you have already given an API key to another tool, generating a fresh one for 1app.energy will invalidate the previous one.

Step 1 — Log in to myaccount

Go to myaccount.myenergi.com and sign in with the email address that was used when your Zappi (and hub) were originally registered.

If you do not see an "Advanced" button on the next screen, log out and log back in — usually it means a different account is cached in your browser.

Step 2 — Open your Products page and find your gateway

From the left-hand menu, go to Products. You will see a list of every myenergi device on your account.

At the top of the list is your Gateway Product. This is either a dedicated myenergi Hub, or whichever device on your system has the Ethernet or WiFi connection to the internet — for many people it is the Zappi itself acting as the gateway. It is the only device that can issue an API key.

Step 3 — Note the hub serial number

The serial number is shown next to your gateway device, labelled SN. Copy it somewhere safe — you will paste it into 1app.energy alongside the API key.

Step 4 — Open Advanced Options

Click the Advanced button (it has a small key icon) next to your gateway device.

The Advanced Options window opens, with a Generate new API key option and the date your last key was issued.

Step 5 — Generate a new API key

Click Generate new API key.

myenergi will warn you that this will replace any existing key. If you are sure no other tool depends on the current key, click Yes, I am sure.

Your new API key will appear on screen. Use the Copy to clipboard button on the right.

This is the only time the key will ever be shown. Copy it immediately, or paste it straight into 1app.energy. If you lose it, you will need to generate a new one.

Step 6 — Paste both values into 1app.energy

In 1app.energy, go to Settings → Devices, choose Zappi, and paste in:

• The hub serial number from Step 3
• The API key from Step 5

We validate the credentials against the myenergi API on save. If the connection works, your Zappi will appear on your dashboard within a minute, and live charging data will start flowing.

If something goes wrong

• "Advanced" button not visible — you are logged into a shared account, not the original registering account. Log out and log in with the email used at install time.
• Key was accepted then stopped working — somebody (you, or another tool such as Home Assistant) generated a new key on the same hub, which invalidates the old one. Generate a fresh key and paste it back into 1app.energy.
• No gateway device showing — your Zappi is not yet linked to a hub on myaccount. Add it inside the myenergi app first, then return to myaccount.

A note on the myenergi API itself

myenergi do not currently offer an officially supported public API — the key gives access to the same internal API their app uses. They have stated they are working on an official one. In the meantime, the key route described above is the established way to integrate Zappi data with third-party tools, and is what 1app.energy uses.

Once the official API lands, we will switch over without you needing to do anything.

More setup guides

Setting up other devices in 1app.energy at the same time? See:

• How to get your Octopus Energy API key — for your tariff and account number
• How to get your SolisCloud API key — for Solis hybrid inverters
• All device setup guides — full list

Need a hand? Email us at support@1app.energy and we will help you connect.