Azure OpenAI Service Chat Completions API

Chat-formatted text generation

Documentation GitHub OpenAPI

Operations 1

POST /deployments/{deployment-id}/chat/completions Create a chat completion #

Specifications

https://raw.githubusercontent.com/api-evangelist/microsoft-azure-openai/refs/heads/main/openapi/azure-openai-chat-completions-api-openapi.yml

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Azure OpenAI Inference REST Audio Chat Completions API
  version: '2024-10-21'
  description: 'Data-plane REST API for running inference against models deployed to an

    Azure OpenAI resource. Endpoints follow the pattern

    `https://{resource-name}.openai.azure.com/openai/deployments/{deployment-id}/{endpoint}?api-version={api-version}`.


    Authenticate with an `api-key` header or with a Microsoft Entra ID bearer token

    (`Authorization: Bearer ...`, scope `https://cognitiveservices.azure.com/.default`).

    '
  contact:
    name: Azure OpenAI Service
    url: https://learn.microsoft.com/en-us/azure/ai-services/openai/reference
servers:
- url: https://{resource-name}.openai.azure.com/openai
  description: Azure OpenAI resource endpoint
  variables:
    resource-name:
      default: my-resource
      description: Your Azure OpenAI resource name
tags:
- name: Chat Completions
  description: Chat-formatted text generation
paths:
  /deployments/{deployment-id}/chat/completions:
    post:
      summary: Create a chat completion
      operationId: createChatCompletion
      tags:
      - Chat Completions
      parameters:
      - in: path
        name: deployment-id
        required: true
        schema:
          type: string
      - in: query
        name: api-version
        required: true
        schema:
          type: string
          default: '2024-10-21'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ChatCompletionRequest'
      responses:
        '200':
          description: Chat completion
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ChatCompletionResponse'
      security:
      - apiKey: []
      - entra: []
components:
  schemas:
    ChatCompletionResponse:
      type: object
      properties:
        id:
          type: string
        object:
          type: string
        created:
          type: integer
        model:
          type: string
        choices:
          type: array
          items:
            type: object
            properties:
              index:
                type: integer
              message:
                $ref: '#/components/schemas/ChatMessage'
              finish_reason:
                type: string
        usage:
          type: object
          properties:
            prompt_tokens:
              type: integer
            completion_tokens:
              type: integer
            total_tokens:
              type: integer
    ChatCompletionRequest:
      type: object
      required:
      - messages
      properties:
        messages:
          type: array
          items:
            $ref: '#/components/schemas/ChatMessage'
        temperature:
          type: number
        top_p:
          type: number
        n:
          type: integer
        stream:
          type: boolean
        stop:
          type:
          - string
          - array
        max_tokens:
          type: integer
        max_completion_tokens:
          type: integer
        presence_penalty:
          type: number
        frequency_penalty:
          type: number
        logit_bias:
          type: object
        user:
          type: string
        seed:
          type: integer
        response_format:
          type: object
        tools:
          type: array
          items:
            type: object
        tool_choice:
          type:
          - string
          - object
    ChatMessage:
      type: object
      required:
      - role
      properties:
        role:
          type: string
          enum:
          - system
          - user
          - assistant
          - tool
          - developer
          - function
        content:
          type:
          - string
          - array
          - 'null'
        name:
          type: string
        tool_call_id:
          type: string
  securitySchemes:
    apiKey:
      type: apiKey
      in: header
      name: api-key
      description: Azure OpenAI resource API key
    entra:
      type: oauth2
      description: Microsoft Entra ID OAuth 2.0 bearer token
      flows:
        clientCredentials:
          tokenUrl: https://login.microsoftonline.com/common/oauth2/v2.0/token
          scopes:
            https://cognitiveservices.azure.com/.default: Azure Cognitive Services data plane