Introduction to REST API in Salesforce: Step-by-Step Beginner Guide | How to Get Started With Salesforce REST API

One of the most important and crucial skills to learn if you’re new to Salesforce development is how to integrate external apps via REST API. With the Salesforce REST API, you may use basic HTTP methods like GET, POST, PATCH, and DELETE to access and modify data in your Salesforce organization.

We’ll go over the fundamentals, the operation of the REST API, and an example of calling Salesforce data using HTML and JavaScript in this tutorial.

🔍 What is REST API in Salesforce?

One lightweight web service protocol is called REST (Representational State Transfer). Because Salesforce exposes data in a RESTful fashion, you can use common web technologies like JSON, HTTP, and URIs to carry out CRUD (Create, Read, Update, Delete) activities.

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🧾 Basic Flow for REST API Integration

Authentication using OAuth 2.0
Access Token Generation
Calling Salesforce API Endpoints
Processing the Response

💻 Sample HTML + JavaScript to Call Salesforce REST API

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 <!DOCTYPE html>
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<html>
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<head>
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  <title>Salesforce REST API Call</title>

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</head>
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<body>
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  <h2>Salesforce Account Data</h2>
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  <button onclick="getAccountData()">GET Account Records</button>

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  <div id="output"></div>
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  <script>
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```
    async FUNCTION getAccountData() {
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      const accessToken = 'YOUR_ACCESS_TOKEN';

      const instanceUrl = 'https://yourInstance.salesforce.com';

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```

      const response = await fetch(`${instanceUrl}/services/data/v59.0/query?q=SELECT+Id,Name+FROM+Account+LIMIT+5`, {

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        method: 'GET',
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        headers: {
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          'Authorization': `Bearer ${accessToken}`,

          'Content-Type': 'application/json'

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        }
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      });
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      const DATA = await response.json();

      document.getElementById("output").textContent = JSON.stringify(DATA, NULL, 2);

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    }
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  </script>
```
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</body>
```
```
</html>
```

📌 Conclusion

Salesforce’s REST API is only getting started. You can integrate Salesforce with any third-party system once you know the fundamentals. We’ll walk you through configuring Postman for REST API testing in Salesforce in the upcoming post. Keep an eye out!

FAQ (Frequently Asked Questions)

What is the introduction of REST API in Salesforce?

You can use REST API tools to create, manipulate, and search data in Salesforce by sending HTTP requests to endpoints in Salesforce. Depending on where you send requests, you access and operate on different pieces of information, called resources. Resources include records, query results, metadata, and more.

What is a REST API for beginners?

A REST API is a mechanism that allows different software applications to communicate with each other over the internet or local network. REST APIs follow specific rules and standards that enable applications and users to use HTTP requests to access and use data.

What is the main purpose of a REST API?

The basic function of a RESTful API is the same as browsing the internet. The client contacts the server by using the API when it requires a resource. API developers explain how the client should use the REST API in the server application API documentation.

Vijay Kumar

Hi, This is Vijay Kumar behind the admin and founder of w3web.net. I am a senior software developer and working in MNC company from more than 8 years. I am great fan of technology, configuration, customization & development. Apart of this, I love to write about Blogging in spare time, Working on Mobile & Web application development, Salesforce lightning, Salesforce LWC and Salesforce Integration development in full time. [Read full bio] | | The Sitemap where you can find all published post on w3web.net

Introduction to REST API in Salesforce: Step-by-Step Beginner Guide | How to Get Started With Salesforce REST API | Salesforce REST API Tutorial