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OpenAPI Specification

openapi: 3.2.0
info:
  title: Ollama OpenAI Compatibility Images API
  description: Ollama provides compatibility with parts of the OpenAI API, allowing existing applications built for OpenAI to connect to locally-running models through Ollama. Supported endpoints include chat completions, completions, embeddings, models, images, and the Responses API.
  version: 0.1.0
  contact:
    name: Ollama Team
    url: https://ollama.com
  license:
    name: MIT
    url: https://opensource.org/licenses/MIT
servers:
- url: http://localhost:11434/v1
  description: Local Ollama Server (OpenAI-compatible)
security:
- bearerAuth: []
tags:
- name: Images
  description: Generate images from text descriptions using the OpenAI-compatible images endpoint. Experimental feature.
paths:
  /images/generations:
    post:
      operationId: createImage
      summary: Ollama Create image
      description: Creates an image given a text prompt. This is an experimental endpoint that may change or be removed. Only supports b64_json response format.
      tags:
      - Images
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ImageGenerationRequest'
      responses:
        '200':
          description: Successful image generation response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ImageGenerationResponse'
        '400':
          description: Bad Request
        '404':
          description: Model not found
components:
  schemas:
    ImageGenerationResponse:
      type: object
      description: Response object from an image generation request.
      properties:
        created:
          type: integer
          description: Unix timestamp of when the image was created.
        data:
          type: array
          description: The generated image data.
          items:
            type: object
            properties:
              b64_json:
                type: string
                description: The base64-encoded image data.
    ImageGenerationRequest:
      type: object
      description: Request body for generating images in OpenAI-compatible format. This is an experimental endpoint.
      required:
      - model
      - prompt
      properties:
        model:
          type: string
          description: The model to use for image generation.
        prompt:
          type: string
          description: A text description of the desired image.
        size:
          type: string
          description: The size of the generated image, such as 1024x1024.
        response_format:
          type: string
          description: The format in which the image is returned. Only b64_json is supported.
          enum:
          - b64_json
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: API key authentication. The key is accepted but not validated by Ollama. Use any value such as ollama.
externalDocs:
  description: Ollama OpenAI Compatibility Documentation
  url: https://docs.ollama.com/api/openai-compatibility