List of Commonly Used API Calls

See the solution below.

Create (also known as Insert) Update - Upsert - Delete - Undelete - Query - Retrieve.

API stands for Application Programming Interface, which is a set of protocols, routines, and tools for building software and applications. In Salesforce, the API is used to interact with Salesforce data using code.

There are many API calls available in Salesforce, and the specific ones that are commonly used depend on the needs of the organization and the type of integration being performed. However, some of the commonly used API calls in Salesforce include:

1. REST API - The Salesforce REST API is a simple and powerful API for accessing Salesforce data. It supports a variety of data formats, including JSON and XML, and can be used to retrieve, create, update, or delete records in Salesforce.

2. SOAP API - The Salesforce SOAP API is a more complex API that uses the SOAP protocol for communication. It can be used to access a wide range of Salesforce features, including querying, updating, and creating records.

3. Bulk API - The Salesforce Bulk API is designed for loading or deleting large volumes of data. It is optimized for handling large data sets and can be used to process up to 100 million records at a time.

4. Metadata API - The Metadata API is used to manage metadata in Salesforce, such as custom fields, objects, and layouts. It allows developers to deploy metadata changes across multiple environments, such as from a development sandbox to a production environment.

5. Tooling API - The Tooling API is used to build custom development tools and integrate with other development environments, such as Eclipse or Visual Studio Code. It provides a rich set of functionality for working with Apex code, Visualforce pages, and Lightning components.

6. Apex REST API - The Apex REST API is a custom API that can be created using Apex code. It provides a simple and secure way to expose Salesforce data to external systems, and can be used to implement custom integration scenarios.

7. Chatter API - The Chatter API is used to access and manipulate Chatter data in Salesforce, such as feeds, groups, and users. It can be used to build custom Chatter clients or integrate Chatter into other applications.

Overall, these are just a few of the commonly used API calls in Salesforce, and there are many more available depending on the specific needs of an organization or integration.