> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getoutbox.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# List Built-In Agent Tools

> Fetch Outbox-native built-in tools that can be attached to agents without creating a custom webhook or MCP server.



## OpenAPI

````yaml GET /agent/tool/builtins/
openapi: 3.1.0
info:
  title: Outbox AI API
  description: API for managing AI agents (chatbots and voicebots) on the Outbox platform
  version: 1.0.0
servers:
  - url: https://api.getoutbox.ai
security: []
paths:
  /agent/tool/builtins/:
    get:
      summary: List Built-In Agent Tools
      description: >-
        Fetch Outbox-native built-in tools that can be attached to agents
        without creating a custom webhook or MCP server.
      responses:
        '200':
          description: Built-in tools retrieved successfully
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/BuiltinTool'
        '401':
          description: Unauthorized - Invalid or missing API key
      security:
        - CompanyApiKey: []
components:
  schemas:
    BuiltinTool:
      type: object
      properties:
        key:
          type: string
          enum:
            - send_sms
            - send_email
            - create_opportunity
            - update_opportunity
            - update_contact
            - add_tag
            - remove_tag
            - add_to_workflow
            - remove_from_workflow
            - book_ai_callback
          description: Built-in tool key used as `builtin_key` when attaching the tool
        name:
          type: string
          description: Human-readable tool name
        description:
          type: string
          description: What the built-in tool does
        schema:
          type: array
          description: Resolved input schema for this built-in tool
          items:
            $ref: '#/components/schemas/ToolParameter'
    ToolParameter:
      type: object
      properties:
        id:
          type: string
        name:
          type: string
        description:
          type: string
        type:
          type: string
        required:
          type: boolean
  securitySchemes:
    CompanyApiKey:
      type: apiKey
      in: header
      name: Authorization
      description: Company API Key

````