ZotGPT (UC Irvine) Chat Completions API

openapi: 3.2.0
info:
  title: ZotGPT Gateway Chat API
  version: '1.0'
  summary: UC Irvine's unified AI API gateway, on the Portkey API specification.
  description: 'A faithful, documentation-derived contract for the surface UC Irvine

    publishes for the ZotGPT Gateway.'
  contact:
    name: UCI OIT AI Team
    email: oit-ai@uci.edu
    url: https://zotgpt.uci.edu/help/
  x-provenance:
    generated: '2026-07-28'
    method: generated
    source:
    - https://zotgpt.uci.edu/services/gateway/
    - https://zotgpt.uci.edu/services/gateway/clients/
    - https://zotgpt.uci.edu/services/migrate-azure-api/
    upstream-spec: https://portkey.ai/docs/introduction/what-is-portkey
    note: No anonymous OpenAPI/Swagger was retrievable from any ZotGPT host. Probes for /openapi.json, /openapi.yaml, /swagger.json, /api-docs, /docs and /v1/models against api.zotgpt.uci.edu all failed at DNS resolution; the Azure API Management developer portal at portal.azureapi.zotgpt.uci.edu returned 200 but gates its API definitions behind sign-in.
servers:
- url: https://api.portkey.ai/v1
  description: OpenAI-compatible base URL, as documented for ZotGPT Gateway clients.
- url: https://api.portkey.ai
  description: Anthropic-style base URL, as documented for ZotGPT Gateway clients.
security:
- virtualKey: []
tags:
- name: Chat Completions
  description: Chat completions across the campus model catalog.
paths:
  /chat/completions:
    post:
      tags:
      - Chat Completions
      operationId: createChatCompletion
      summary: Create a chat completion
      description: Send a chat completion request to any model in the ZotGPT campus Model Catalog. The model is selected by slug; the upstream provider is selected by the x-portkey-provider header carrying a UCI provider alias. Streaming responses are supported.
      parameters:
      - $ref: '#/components/parameters/PortkeyProvider'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ChatCompletionRequest'
            examples:
              claudeOnBedrock:
                summary: Claude Opus on AWS Bedrock via the campus alias
                value:
                  model: '@zotgpt-api-bedrock/us.anthropic.claude-opus-4-7'
                  messages:
                  - role: user
                    content: Summarize this syllabus in five bullets.
              openaiProd:
                summary: An OpenAI model via the campus alias
                value:
                  model: '@openai-prod/gpt-5.5'
                  messages:
                  - role: user
                    content: Draft a rubric for a first-year writing assignment.
                  stream: true
      responses:
        '200':
          description: A chat completion, or a Server-Sent Events stream when stream is true.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ChatCompletionResponse'
            text/event-stream:
              schema:
                type: string
                description: SSE stream of chat completion chunks.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/BudgetOrRateLimited'
components:
  responses:
    Unauthorized:
      description: Missing, revoked, or non-UCI virtual key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    BudgetOrRateLimited:
      description: Request rejected by rate limiting or by the per-key spend limit / workspace budget enforcement UCI applies to virtual keys.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  parameters:
    PortkeyProvider:
      name: x-portkey-provider
      in: header
      required: false
      description: The UCI provider alias to route to, for example "@zotgpt-api-bedrock" or "@openai-prod". May also be carried as a prefix on the model slug.
      schema:
        type: string
        examples:
        - '@zotgpt-api-bedrock'
        - '@openai-prod'
  schemas:
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            message:
              type: string
            type:
              type: string
            code:
              type: string
    Message:
      type: object
      required:
      - role
      - content
      properties:
        role:
          type: string
          enum:
          - system
          - user
          - assistant
        content:
          type: string
    Usage:
      type: object
      description: Token accounting, which is what the campus budget tiers are drawn against.
      properties:
        prompt_tokens:
          type: integer
        completion_tokens:
          type: integer
        total_tokens:
          type: integer
    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/Message'
              finish_reason:
                type: string
        usage:
          $ref: '#/components/schemas/Usage'
      additionalProperties: true
    ChatCompletionRequest:
      type: object
      required:
      - model
      - messages
      properties:
        model:
          type: string
          description: A model slug from the ZotGPT campus Model Catalog, optionally prefixed with a UCI provider alias.
        messages:
          type: array
          items:
            $ref: '#/components/schemas/Message'
        stream:
          type: boolean
          default: false
        temperature:
          type: number
        max_tokens:
          type: integer
      additionalProperties: true
  securitySchemes:
    virtualKey:
      type: apiKey
      in: header
      name: x-portkey-api-key
      description: A workspace virtual API key minted by the user in the ZotGPT Gateway portal after signing in with UCInetID. UCI documents it as "treat as a password." Bearer-scheme presentation is documented for Anthropic-style clients such as Claude Desktop.