API Style Guides

Microsoft REST API Guidelines

Microsoft's organization-wide REST API design guidelines, originally published in 2016 and now maintained as separate Azure and Microsoft Graph guideline documents under the umbrella Guidelines.md. Licensed CC BY 4.0 to encourage adoption beyond Microsoft.

GitHub

SDKs

📦
GitHubRepository
https://github.com/microsoft/api-guidelines

Other Resources

🔗
StyleGuide
https://github.com/microsoft/api-guidelines/blob/vNext/Guidelines.md
🔗
AzureStyleGuide
https://github.com/microsoft/api-guidelines/blob/vNext/azure/Guidelines.md
🔗
GraphStyleGuide
https://github.com/microsoft/api-guidelines/blob/vNext/graph/GuidelinesGraph.md
🔗
License
https://github.com/microsoft/api-guidelines/blob/vNext/license.txt
🔗
Scope
🔗
APIsJSON
https://raw.githubusercontent.com/api-evangelist/style-guides/refs/heads/main/apis.yml

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/microsoft"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑ 
aid: style-guides:microsoft
name: Microsoft REST API Guidelines
description: Microsoft's organization-wide REST API design guidelines, originally published in 2016 and
  now maintained as separate Azure and Microsoft Graph guideline documents under the umbrella Guidelines.md.
  Licensed CC BY 4.0 to encourage adoption beyond Microsoft.
humanURL: https://github.com/microsoft/api-guidelines
baseURL: https://raw.githubusercontent.com/microsoft/api-guidelines/vNext/
tags:
- REST
- Microsoft
- Azure
- Microsoft Graph
- OData
properties:
- type: StyleGuide
  url: https://github.com/microsoft/api-guidelines/blob/vNext/Guidelines.md
- type: AzureStyleGuide
  url: https://github.com/microsoft/api-guidelines/blob/vNext/azure/Guidelines.md
- type: GraphStyleGuide
  url: https://github.com/microsoft/api-guidelines/blob/vNext/graph/GuidelinesGraph.md
- type: License
  url: https://github.com/microsoft/api-guidelines/blob/vNext/license.txt
- type: GitHubRepository
  url: https://github.com/microsoft/api-guidelines
- type: Scope
  data:
    surfaces:
    - REST
    publisher: Microsoft
    license: CC BY 4.0
    status: living