openapi: 3.0.1
info:
  title: Targon Chat API
  description: 'OpenAI-compatible REST API for Targon, the decentralized AI inference platform operated as Bittensor Subnet 4 by Manifold Labs. Inference is produced by a marketplace of miners running OpenAI-compliant endpoints and verified by validators. The public surface follows the OpenAI API shape: chat completions, legacy text completions, model listing, image generation, and search. All requests are authenticated with a Bearer API key.'
  termsOfService: https://targon.com
  contact:
    name: Targon Support
    url: https://docs.targon.com
  version: '1.0'
servers:
- url: https://api.targon.com/v1
  description: Targon OpenAI-compatible inference base URL.
security:
- bearerAuth: []
tags:
- name: Chat
  description: OpenAI-compatible chat completions.
paths:
  /chat/completions:
    post:
      operationId: createChatCompletion
      tags:
      - Chat
      summary: Create a chat completion
      description: 'Generates a model response for the given chat conversation. Compatible with the OpenAI Chat Completions API. Set `stream: true` to receive the response as Server-Sent Events.'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateChatCompletionRequest'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CreateChatCompletionResponse'
            text/event-stream:
              schema:
                $ref: '#/components/schemas/ChatCompletionChunk'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
components:
  responses:
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    RateLimited:
      description: Too many requests.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    ChatCompletionChunk:
      type: object
      description: A single Server-Sent Event chunk emitted when stream is true.
      properties:
        id:
          type: string
        object:
          type: string
          example: chat.completion.chunk
        created:
          type: integer
        model:
          type: string
        choices:
          type: array
          items:
            type: object
            properties:
              index:
                type: integer
              delta:
                type: object
                properties:
                  role:
                    type: string
                  content:
                    type: string
              finish_reason:
                type: string
                nullable: true
    Usage:
      type: object
      properties:
        prompt_tokens:
          type: integer
        completion_tokens:
          type: integer
        total_tokens:
          type: integer
    CreateChatCompletionRequest:
      type: object
      required:
      - model
      - messages
      properties:
        model:
          type: string
          description: The id of the model to use.
          example: deepseek-ai/DeepSeek-R1
        messages:
          type: array
          description: The conversation so far, as a list of messages.
          items:
            $ref: '#/components/schemas/ChatMessage'
        stream:
          type: boolean
          default: false
          description: If true, response tokens are sent as Server-Sent Events.
        temperature:
          type: number
          format: float
          default: 1
          minimum: 0
          maximum: 2
          description: Sampling temperature.
        top_p:
          type: number
          format: float
          default: 1
          description: Nucleus sampling probability mass.
        max_tokens:
          type: integer
          description: Maximum number of tokens to generate.
        stop:
          oneOf:
          - type: string
          - type: array
            items:
              type: string
          description: Up to 4 sequences where generation stops.
        frequency_penalty:
          type: number
          format: float
          default: 0
        presence_penalty:
          type: number
          format: float
          default: 0
        seed:
          type: integer
          description: Seed for best-effort deterministic sampling.
    ChatMessage:
      type: object
      required:
      - role
      - content
      properties:
        role:
          type: string
          description: The role of the message author.
          enum:
          - system
          - user
          - assistant
          - tool
        content:
          type: string
          description: The text content of the message.
        name:
          type: string
          description: Optional name of the author of this message.
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            message:
              type: string
            type:
              type: string
            code:
              type: string
    CreateChatCompletionResponse:
      type: object
      properties:
        id:
          type: string
        object:
          type: string
          example: chat.completion
        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
                example: stop
        usage:
          $ref: '#/components/schemas/Usage'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Targon API key passed as a Bearer token in the Authorization header: `Authorization: Bearer $TARGON_API_KEY`.'