Shapes Chat API

openapi: 3.0.3
info:
  title: Shapes Chat API
  version: '1.0'
  description: 'OpenAI-compatible API for Shapes, general-purpose social AI agents (characters) with rich personalities and short-term plus long-term memory. Chat completions run a named Shape as the model (shapesinc/<shape-username>) across 50+ text, image, and voice models. NOTE: the developer API was deprecated on 2025-09-25; Shapes remains available as a consumer product at https://shapes.inc.'
  contact:
    name: Shapes, Inc. Support
    url: https://talk.shapes.inc/support
  license:
    name: See repository license
    url: https://github.com/shapesinc/shapes-api/blob/main/license
servers:
- url: https://api.shapes.inc
  description: Shapes API production host
tags:
- name: Chat
paths:
  /v1/chat/completions:
    post:
      operationId: createChatCompletion
      summary: Create a chat completion with a Shape
      description: OpenAI-compatible chat completion. The `model` field selects the Shape as `shapesinc/<shape-username>`. Supports text plus a single `image_url` or `audio_url` content part. Streaming, system messages, message history, and parameter control (e.g. temperature) are not supported; personality and settings come from the Shape's shapes.inc configuration.
      security:
      - bearerAuth: []
      parameters:
      - name: X-User-Id
        in: header
        required: false
        description: End-user identifier; isolates conversation context and memory per user.
        schema:
          type: string
      - name: X-Channel-Id
        in: header
        required: false
        description: Conversation/channel context identifier for multi-conversation apps.
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ChatCompletionRequest'
      responses:
        '200':
          description: OpenAI-compatible chat completion response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ChatCompletionResponse'
        '401':
          description: Missing or invalid API key.
        '429':
          description: Rate limit exceeded (default 20 requests per minute).
      tags:
      - Chat
components:
  schemas:
    ChatCompletionRequest:
      type: object
      required:
      - model
      - messages
      properties:
        model:
          type: string
          description: Shape model in the form `shapesinc/<shape-username>`.
          example: shapesinc/tenshi
        messages:
          type: array
          items:
            $ref: '#/components/schemas/Message'
    ContentPart:
      type: object
      properties:
        type:
          type: string
          enum:
          - text
          - image_url
          - audio_url
        text:
          type: string
        image_url:
          type: object
          properties:
            url:
              type: string
              format: uri
        audio_url:
          type: object
          properties:
            url:
              type: string
              format: uri
    ChatCompletionResponse:
      type: object
      description: Standard OpenAI-compatible chat completion 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
    Message:
      type: object
      required:
      - role
      - content
      properties:
        role:
          type: string
          enum:
          - user
          - assistant
        content:
          oneOf:
          - type: string
          - type: array
            items:
              $ref: '#/components/schemas/ContentPart'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'API key issued at https://shapes.inc/developer, sent as `Authorization: Bearer <API-key>`.'
externalDocs:
  description: Shapes API repository (deprecated)
  url: https://github.com/shapesinc/shapes-api