Google’s Knowledge Graph Search API: A Guide

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A knowledge graph, often a semantic network, portrays a network of actual things, such as things, events, circumstances, or concepts, and shows how they are related.

Knowledge Graph: What Does It Mean?

 The name “knowledge graph” was coined since this material is typically kept in graph databases and shown as a graph structure.

google knowledge graph

Nodes, edges, and labels are the three main parts of a knowledge graph. i.e., A node can be anything, location, or person, and an edge describes the connection between the nodes.

Understanding Graph API

We can look for entities across the Google Knowledge Graph for specific queries thanks to the Knowledge Graph API that Google built.

We can observe the entities marked up for each query since we have direct access to the database. It may be location-neutral, providing a more accurate picture of the Knowledge Graph.

graph api

According to Google, some example uses of the API include:

A list of the most notable entities that meet specific criteria is obtained.

  • In a search field, they are anticipatorily finishing entities.
  • Using entities from the Knowledge Graph to annotate and organize content.
  • As stated in the documentation, the API only returns entities that fit specific criteria rather than interconnected networks.

Making Use Of Python To Name The API

Google allows the API to be accessed using Python, Java, JavaScript, and PHP, which are all different purchasers.

You may see an example of where to start for each on the relevant documentation page.

Since Python is the most familiar language, I will utilize it in this situation.

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The Machine Creates An API Key

– Creating an API key is the initial step in submitting a request to the API.

-Visit the credentials page on the Google API dashboard to generate an API key.

-The next step entails visiting the API library, looking for Information Graph, and approving it.

Easy API Request

You can run a little piece of Python code to retrieve entities matching a question in your environment or at Google Colab (which is simple to use for novice users). The function also returns the results rating for each object.

It will result in something.

We will set a few parameters inside the result depending on our search criteria.

You must add your API key before adding the query for which you want to produce results.

The question you’ve chosen and the API key you’ve already added are then set as the parameters.

This allows you to change the query each time the code is run quickly.

The constraint currently in place is the range of entities you must return.

The maximum is 500, with 20 as the default. Do not forget that requests with high restrictions are more likely to time out.

The JSON response’s need for indentation will determine using a Boolean (True or False) to make formatting easier.

The following are other parameters you could adopt including:


A list of the language codes to which you need to limit your response.


Used to restrict the entities to those of the type you choose, for instance, if you just need “Individual” entity results.

Then we instruct the script to name the URL, complete the form, and parse the results into an easy-to-print entity identification and outcome rating for each entity, which can be put inside parentheses.

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Response Boxes

For each entity in the Information Graph API, the following fields can be extracted:

The entity’s canonical URI, or id.

Identify the entity’s identifier.

Sort: a list of compatible schema types that support the entity.

Description: a brief explanation of the object.

Picture: an image connected to the object.

Detailed description: A thorough account of the object.

URL: the organization’s official website.

ResultScore: A measure of how well the entity answers the query.

The term “id subject” refers to each entity’s unique MID (machine-generated identification).

Sometimes, this starts with kg:/m/ and follows by an append short string. MIDs translate human language into a form that computers can basically understand.

These MIDs also match the entity in Google Tendencies and can use to access each entity’s URL even if it doesn’t have a data panel.


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