How to connect a Postcode API to Google Sheets

In this tutorial we will show you how to get post codes or zip codes data into your Google Sheets using an API. The tutorial shows the process to connect to an API that has data on UK postcodes, but you can follow the same process to connect to a US zip code API such as this one or this one.

The example API we cover below,, is a free postcode lookup API and geocoder for the UK. In this tutorial, we’ll show you how to connect the API to Google Sheets in 4 steps:

  1. Install the Apipheny add-on
  2. Choose a endpoint
  3. Enter your API request into Apipheny
  4. Run the API request in your Google Sheet

Step 1.) Install and open the Apipheny add-on for Google Sheets

Apipheny is a free API connector for Google Sheets. You can use Apipheny to connect your Google Sheets to API data sources, easily.

1.) Install Apipheny by opening the following link on desktop and then clicking the Install button in the Google Marketplace:

2.) After you’ve installed Apipheny, open a Google Sheet and then click on the Extensions dropdown in the menu at the top.

In the dropdown list you should see Apipheny. Click Apipheny then click Import API to open the Apipheny sidebar in your Google Sheet.

open apipheny

Tip: you can open a new Google Sheet by entering this URL in your browser:

Step 2.) Choose an endpoint

In this section, we’ll show you how to browse the API documentation to find the endpoint that retrieves the information you need from your account. If you already know your API URL, or you want to use the same example URL as us, just skip to Step 3.

First, open the API documentation page: API documentation page API documentation page

This page contains general information about the API and a list of Methods (Endpoints): Methods section Methods section

If you scroll down you will find the endpoints:

An example endpoint is Postcode Validation, which validates a given postcode. The URL for this endpoint is:

If you use this URL, don’t forget to replace POSTCODE with a real postcode value.

Each endpoint’s documentation contains a description of the response it returns, its HTTP method and URI, as well as additional details about its operations (the parameters it takes, the rules it applies, etc.).

Postcode Validation Endpoint
Postcode Validation Endpoint

All endpoints can be accessed from the following base domain:

Step 3.) Enter your API request into Apipheny

Now go back to your Google Sheet and make sure that the Apipheny add-on is open on the “Import” tab. With the Import tab open, enter these details into the add-on:

Method: At the top of the Apipheny sidebar, select the HTTP method (GET or POST) required by your API endpoint. For this example, we are using the GET method.

API URL: In Step 2, we explained how you can find the API endpoint that you need. Now copy and paste your complete API URL into the Apipheny add-on, where it says API URL Path, followed by any parameters required for your query (if applicable).

For this example, we are using the Lookup a postcode endpoint, which retrieves details about a specific postcode. This is what the whole URL looks like:

If you use this URL, you should replace POSTCODE with a real value of a postcode located in UK.

Headers aren’t required. This API does not require any authentication. You can leave the Headers section blank in Apipheny. API request entered into Apipheny API request entered into Apipheny

Step 4.) Run the Postcode API Request in Your Google Sheet

Finally, the last step is to click the Run button at the bottom of the Apipheny add-on and then wait for the API data to be imported into your Google Sheet. Here’s what our request looked like when completed: data imported into Google Sheets data imported into Google Sheets

That’s it! You’ve successfully connected your Postcodes account to Google Sheets using the API, Google Sheets API, and the Apipheny add-on.

After making a successful request to the API, try querying a different API endpoint, or try using one of the more advanced features in the Apipheny add-on.

You can follow the same process to connect to a US zip code API such as this one or this one.

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