Salesforce API and it’s usage

Hello Avnish

Example of salesforce APIs:

1. REST API:  is a simple and powerful web service based on RESTful principles. It exposes all sorts of Salesforce functionality via REST resources and HTTP methods. For example, you can create, read, update, and delete (CRUD) records, search or query your data, retrieve object metadata, and access information about limits in your org. REST API supports both XML and JSON.
2. SOAP API:  is a robust and powerful web service based on the industry-standard protocol of the same name. It uses a Web Services Description Language (WSDL) file to rigorously define the parameters for accessing data through the API. SOAP API supports XML only. Most of the SOAP API functionality is also available through REST API. It just depends on which standard better meets your needs.
3. Bulk API: is a specialized RESTful API for loading and querying lots of data at once. By lots, we mean 50,000 records or more. Bulk API is asynchronous, meaning that you can submit a request and come back later for the results. This approach is the preferred one when dealing with large amounts of data. There are two versions of Bulk API (1.0 and 2.0). Both versions handle large amounts of data, but we use Bulk API 2.0 in this module because it’s a bit easier to use.
4. Streaming API: is a specialized API for setting up notifications that trigger when changes are made to your data. It uses a publish-subscribe, or pub/sub, model in which users can subscribe to channels that broadcast certain types of data changes.

Hi Avnish,

Examples of salesforce api's are:

API Name                       Protocol                   Data Format             Communication

REST API                       REST                        JSON, XML                  Synchronous

SOAP API                      SOAP (WSDL)         XML                              Synchronous

Chatter REST API          REST                        JSON, XML                    Synchronous

User Interface API          REST                        JSON                               Synchronous

Analytics REST API      REST                         JSON, XML                    Synchronous

Bulk API                         REST                        CSV, JSON, XML            Asynchronous

Metadata API                 SOAP (WSDL)         XML                                 Asynchronous

Streaming API               Bayeux                       JSON                                Asynchronous

Apex REST API           REST                          JSON, XML, Custom       Synchronous

Apex SOAP API          SOAP (WSDL)           XML                                  Synchronous

Tooling API                 REST or SOAP (WSDL)  JSON, XML, Custom   Synchronous