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OpenAPI Specification

openapi: 3.2.0
info:
  title: Ternary Anomaly Detection Forecasting API
  description: Ternary is a multi-cloud FinOps platform providing programmatic access to cloud cost visibility, anomaly detection, commitment management, cost allocation, forecasting, and reporting. The REST API enables automation of FinOps workflows, integration of cost data into CI/CD pipelines, and programmatic management of all platform capabilities. Authentication uses API keys generated from the Ternary platform.
  version: '1.0'
  contact:
    name: Ternary Support
    url: https://ternary.app/contact/
  termsOfService: https://ternary.app/terms/
servers:
- url: https://api.ternary.app
  description: Ternary Production API
security:
- ApiKeyAuth: []
tags:
- name: Forecasting
  description: Budget forecasting and spend projections
paths:
  /v1/budgets:
    get:
      operationId: listBudgets
      summary: List Budgets
      description: Returns a list of cloud cost budgets configured in the platform, with current spend versus budget targets.
      tags:
      - Forecasting
      parameters:
      - name: page_token
        in: query
        description: Token for paginating through results
        schema:
          type: string
      - name: page_size
        in: query
        description: Number of results per page
        schema:
          type: integer
          default: 50
      responses:
        '200':
          description: Budgets retrieved successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BudgetListResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
    post:
      operationId: createBudget
      summary: Create Budget
      description: Creates a new cloud cost budget with defined spend thresholds and alerts.
      tags:
      - Forecasting
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BudgetRequest'
      responses:
        '201':
          description: Budget created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Budget'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /v1/budgets/{budget_id}:
    get:
      operationId: getBudget
      summary: Get Budget
      description: Returns details of a specific cloud cost budget.
      tags:
      - Forecasting
      parameters:
      - name: budget_id
        in: path
        required: true
        description: The unique identifier of the budget
        schema:
          type: string
      responses:
        '200':
          description: Budget retrieved successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Budget'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    put:
      operationId: updateBudget
      summary: Update Budget
      description: Updates an existing cloud cost budget.
      tags:
      - Forecasting
      parameters:
      - name: budget_id
        in: path
        required: true
        description: The unique identifier of the budget
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BudgetRequest'
      responses:
        '200':
          description: Budget updated successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Budget'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteBudget
      summary: Delete Budget
      description: Deletes a cloud cost budget from the platform.
      tags:
      - Forecasting
      parameters:
      - name: budget_id
        in: path
        required: true
        description: The unique identifier of the budget
        schema:
          type: string
      responses:
        '204':
          description: Budget deleted successfully
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  schemas:
    Budget:
      type: object
      description: A cloud cost budget with spend targets and alerts
      properties:
        id:
          type: string
        name:
          type: string
        description:
          type: string
        amount:
          type: number
          description: Budget amount in USD
        period:
          type: string
          description: Budget period
          enum:
          - monthly
          - quarterly
          - annual
        cloud_provider:
          type: string
        current_spend:
          type: number
          description: Current spend for the current period
        forecasted_spend:
          type: number
          description: Forecasted spend for the current period
        alert_thresholds:
          type: array
          description: List of alert thresholds as percentages of budget
          items:
            type: number
        created_at:
          type: string
          format: date-time
        updated_at:
          type: string
          format: date-time
    ErrorResponse:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              description: Error code
            message:
              type: string
              description: Human-readable error message
            details:
              type: array
              items:
                type: string
    BudgetRequest:
      type: object
      required:
      - name
      - amount
      - period
      properties:
        name:
          type: string
        description:
          type: string
        amount:
          type: number
        period:
          type: string
          enum:
          - monthly
          - quarterly
          - annual
        cloud_provider:
          type: string
        alert_thresholds:
          type: array
          items:
            type: number
    BudgetListResponse:
      type: object
      properties:
        budgets:
          type: array
          items:
            $ref: '#/components/schemas/Budget'
        next_page_token:
          type: string
        total_count:
          type: integer
  responses:
    NotFound:
      description: The requested resource was not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    Unauthorized:
      description: Authentication failed - invalid or missing API key
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key
      description: API key generated from the Ternary platform settings
externalDocs:
  description: Ternary API Documentation
  url: https://docs.ternary.app/