openapi: 3.0.3
info:
  title: Virtuagym Public API (v1) Billing API
  description: 'The Virtuagym Public API lets fitness businesses, health clubs, and partner integrations read and write club data programmatically - members, staff (employees), membership definitions and instances, member credits, invoices, visits (check-ins), events (classes) and their participants, and coaching workout assignments. This document models the current v1 club-scoped surface.

    Access model: Virtuagym''s authoritative reference documentation is access-gated - you request access by emailing api@virtuagym.com with your GitHub username, and you provision an API key and Club secret in the Virtuagym portal under System settings > Business info > Advanced. The endpoints, methods, and query parameters below are grounded in Virtuagym''s publicly mirrored API wiki and in live host probes; request/response bodies are modeled honestly and marked with additionalProperties where the full field set is not published. Treat schema shapes as a starting point and reconcile against the official reference once access is granted.

    Authentication: v1 endpoints authenticate with an `api_key` and a `club_secret`, both passed as query-string parameters, over HTTPS only. (Legacy v0 endpoints used HTTP Basic Auth and are deprecated; a separate OAuth 2.0 flow exists for end-user-context calls and is out of scope for the club-scoped v1 surface modeled here.)'
  version: '1.0'
  contact:
    name: Virtuagym API Team
    url: https://support.virtuagym.com/s/article/API-Link-To-Your-Website
    email: api@virtuagym.com
  license:
    name: Proprietary
    url: https://virtuagym.com
servers:
- url: https://api.virtuagym.com/api
  description: Virtuagym Public API
security:
- apiKeyAuth: []
  clubSecretAuth: []
tags:
- name: Billing
  description: Member credits and club invoices.
paths:
  /v1/club/{club_id}/credit:
    parameters:
    - $ref: '#/components/parameters/ClubId'
    get:
      operationId: listMemberCredits
      tags:
      - Billing
      summary: List member credits
      description: Returns the credit balance / entries of a member.
      parameters:
      - name: member_id
        in: query
        required: false
        description: The member whose credits to return.
        schema:
          type: integer
      - $ref: '#/components/parameters/SyncFrom'
      responses:
        '200':
          description: A list of credit entries.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GenericListResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
    put:
      operationId: assignMemberCredits
      tags:
      - Billing
      summary: Assign member credits
      description: Assigns or adds new credits to a member.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: The updated credit result.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GenericResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /v1/club/{club_id}/invoices:
    parameters:
    - $ref: '#/components/parameters/ClubId'
    post:
      operationId: createInvoice
      tags:
      - Billing
      summary: Create an invoice
      description: Creates a new invoice resource for the club.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: The created invoice.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GenericResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /v1/club/{club_id}/invoices/{invoice_id}:
    parameters:
    - $ref: '#/components/parameters/ClubId'
    - name: invoice_id
      in: path
      required: true
      description: The invoice ID.
      schema:
        type: string
    get:
      operationId: getInvoice
      tags:
      - Billing
      summary: Retrieve an invoice
      description: Returns the invoice resource that corresponds to `invoice_id`.
      responses:
        '200':
          description: The requested invoice.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GenericResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  responses:
    NotFound:
      description: The requested resource was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Missing or invalid api_key / club_secret.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  schemas:
    GenericResponse:
      type: object
      description: Standard Virtuagym envelope. The `result` object carries the resource; exact fields depend on the resource and are additive.
      properties:
        statusMessage:
          type: string
        statistics:
          $ref: '#/components/schemas/Statistics'
        result:
          type: object
          additionalProperties: true
      additionalProperties: true
    GenericListResponse:
      type: object
      description: Standard Virtuagym envelope wrapping an array of resources in `result`.
      properties:
        statusMessage:
          type: string
        statistics:
          $ref: '#/components/schemas/Statistics'
        result:
          type: array
          items:
            type: object
            additionalProperties: true
      additionalProperties: true
    Statistics:
      type: object
      description: Response metadata Virtuagym returns alongside result sets.
      properties:
        resultset_size:
          type: integer
        total_results:
          type: integer
        time_ms:
          type: integer
      additionalProperties: true
    Error:
      type: object
      properties:
        status:
          type: integer
        statusMessage:
          type: string
        result:
          type: object
          additionalProperties: true
      additionalProperties: true
  parameters:
    ClubId:
      name: club_id
      in: path
      required: true
      description: The Virtuagym club ID.
      schema:
        type: integer
    SyncFrom:
      name: sync_from
      in: query
      required: false
      description: Return only resources created or edited since this Unix timestamp in milliseconds.
      schema:
        type: integer
        format: int64
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: query
      name: api_key
      description: The club's API key, provisioned in the Virtuagym portal under System settings > Business info > Advanced.
    clubSecretAuth:
      type: apiKey
      in: query
      name: club_secret
      description: The club secret, provisioned alongside the API key in the Virtuagym portal. Required for all v1 endpoints.