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OData (Open Data Protocol) is an ISO/IEC approved, OASIS standard that defines a set of best practices for building and consuming RESTful APIs. OData helps you focus on your business logic while building RESTful APIs without having to worry about the various approaches to define request and response headers, status codes, HTTP methods, URL conventions, media types, payload formats, query options, etc. OData also provides guidance for tracking changes, defining functions/actions for reusable procedures, and sending asynchronous/batch requests.

OData RESTful APIs are easy to consume. The OData metadata, a machine-readable description of the data model of the APIs, enables the creation of powerful generic client proxies and tools.


Visual Studio Code for OData

Visual Studio Code for OData

OData for Visual Studio Code is a Visual Studio Code extension that adds rich support for the OData query language



XOData is a generic online OData API/Service visualizer and explorer. It assists in rapid prototyping, verification, testing, and documentation of OData APIs. With XOData Chrome App it's also possible to explore OData Services deployed locally or on private networks.


Getting Started

Getting Started

To get started, take a look at Understanding OData in 6 steps. And then the Basic Tutorial, Advanced Tutorial and Postman Tutorial will provide practical samples to learn OData.



OData v4 is standardized by OASIS, including Protocol Specification, URL Conversions, Common Schema Definition Language, JSON Format Specification, ABNF, Standardized Vocabularies, and Aggregation Extension. OData v4 can also be ordered from ISO/IEC as ISO/IEC 20802-1:2016 (OData 4.0 Protocol) and ISO/IEC 20802-2:2016 (OData 4.0 JSON Format)



There are several of libraries to facilitate building and consuming OData service. Restier is the main library for .NET framework. Apache Olingo is for Java platform to build OData service.


Sample Services

There are several OData sample services to help you practice with OData API. TripPin Service is the main sample service.