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REST API versioning

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Azure DevOps Services | Azure DevOps Server 2022 - Azure DevOps Server 2019

Using versioned REST APIs, you can ensure your projects are scalable and maintainable over time while applications and services continue to work as APIs evolve.

Guidelines

  • API version must be specified with every request.
  • API versions are in the format {major}.{minor}[-{stage}[.{resource-version}]] - For example, 1.0, 1.1, 1.2-preview, 2.0.
  • While an API is in preview, you can specify a precise version of a particular revision of the API when needed (for example, 1.0-preview.1, 1.0-preview.2).
  • Once an API is released (1.0, for example), its preview version (1.0-preview) is deprecated and can be deactivated after 12 weeks.
  • During this time, you should upgrade to the released version of the API. Once a preview API is deactivated, requests that specify a -preview version get rejected.

Usage

The API version can be specified either in the header of the HTTP request or as a URL query parameter:

HTTP request header:

Accept: application/json;api-version=1.0

Uri:

[scheme"://"][host[':'port]]"/v" major-version '/'namespace '/'resource ('/'resource)* '?' query

i.e. GET https://dev.azure.com/v1.0/{organization}/_apis/{area}/{resource}?some-query=1000

Supported versions

Product 1.0 2.0 3.0 4.0 5.0 6.0 7.0
Azure DevOps Services X X X X X X X
Azure DevOps Server 2022 X X X X X X X
Azure DevOps Server 2020 X X X X X X -
Azure DevOps Server 2019 X X X X X -
Team Foundation Server 2018 X X X X - -
Team Foundation Server 2017 X X X - - -
Team Foundation Server 2015 X X - - - -

Major API version releases align with Team Foundation Server RTM releases. For example, the 3.0 API set was introduced with Team Foundation Server 2017.

A few undocumented version 1.0 APIs existed in Team Foundation Server 2013, but aren't supported.