Targon Completions API

openapi: 3.0.1
info:
  title: Targon 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.
  - name: Completions
    description: OpenAI-compatible legacy text completions.
  - name: Models
    description: List models available on Targon.
  - name: Images
    description: Image generation from a text prompt.
  - name: Search
    description: Query-based search/retrieval.
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'
  /completions:
    post:
      operationId: createCompletion
      tags:
        - Completions
      summary: Create a completion
      description: >-
        Generates a text completion for the provided prompt. Compatible with
        the OpenAI legacy Completions API. Set `stream: true` to receive the
        response as Server-Sent Events.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateCompletionRequest'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CreateCompletionResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
  /models:
    get:
      operationId: listModels
      tags:
        - Models
      summary: List models
      description: >-
        Lists the models currently available on Targon. The catalog can be
        extended permissionlessly by the community.
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListModelsResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /models/{model}:
    get:
      operationId: retrieveModel
      tags:
        - Models
      summary: Retrieve a model
      description: Retrieves metadata for a single model by id.
      parameters:
        - name: model
          in: path
          required: true
          description: The id of the model to retrieve.
          schema:
            type: string
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Model'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          description: Model not found.
  /images/generations:
    post:
      operationId: createImage
      tags:
        - Images
      summary: Create an image
      description: >-
        Generates one or more images from a text prompt using an image model
        served across the Subnet 4 miner marketplace. Compatible with the
        OpenAI Images API.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateImageRequest'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ImagesResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
  /search:
    post:
      operationId: createSearch
      tags:
        - Search
      summary: Search
      description: >-
        Returns relevant results for a query string, usable to ground model
        responses with retrieved context.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateSearchRequest'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SearchResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        Targon API key passed as a Bearer token in the Authorization header:
        `Authorization: Bearer $TARGON_API_KEY`.
  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:
    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.
    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.
    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'
    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
    CreateCompletionRequest:
      type: object
      required:
        - model
        - prompt
      properties:
        model:
          type: string
          description: The id of the model to use.
        prompt:
          oneOf:
            - type: string
            - type: array
              items:
                type: string
          description: The prompt to complete.
        stream:
          type: boolean
          default: false
        temperature:
          type: number
          format: float
          default: 1
        max_tokens:
          type: integer
        top_p:
          type: number
          format: float
          default: 1
        stop:
          oneOf:
            - type: string
            - type: array
              items:
                type: string
    CreateCompletionResponse:
      type: object
      properties:
        id:
          type: string
        object:
          type: string
          example: text_completion
        created:
          type: integer
        model:
          type: string
        choices:
          type: array
          items:
            type: object
            properties:
              index:
                type: integer
              text:
                type: string
              finish_reason:
                type: string
        usage:
          $ref: '#/components/schemas/Usage'
    ListModelsResponse:
      type: object
      properties:
        object:
          type: string
          example: list
        data:
          type: array
          items:
            $ref: '#/components/schemas/Model'
    Model:
      type: object
      properties:
        id:
          type: string
          description: The model identifier.
          example: deepseek-ai/DeepSeek-R1
        object:
          type: string
          example: model
        created:
          type: integer
        owned_by:
          type: string
          example: targon
    CreateImageRequest:
      type: object
      required:
        - prompt
      properties:
        model:
          type: string
          description: The image model to use.
        prompt:
          type: string
          description: A text description of the desired image.
        n:
          type: integer
          default: 1
          description: The number of images to generate.
        size:
          type: string
          description: The size of the generated images.
          example: 1024x1024
        response_format:
          type: string
          enum:
            - url
            - b64_json
          default: url
    ImagesResponse:
      type: object
      properties:
        created:
          type: integer
        data:
          type: array
          items:
            type: object
            properties:
              url:
                type: string
              b64_json:
                type: string
    CreateSearchRequest:
      type: object
      required:
        - query
      properties:
        query:
          type: string
          description: The search query.
        max_results:
          type: integer
          default: 10
          description: Maximum number of results to return.
    SearchResponse:
      type: object
      properties:
        query:
          type: string
        results:
          type: array
          items:
            type: object
            properties:
              title:
                type: string
              url:
                type: string
              snippet:
                type: string
              score:
                type: number
                format: float
    Usage:
      type: object
      properties:
        prompt_tokens:
          type: integer
        completion_tokens:
          type: integer
        total_tokens:
          type: integer
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            message:
              type: string
            type:
              type: string
            code:
              type: string