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

# Choose an IU plan for the billing organization (admins)



## OpenAPI

````yaml /openapi/v3.yaml post /api/v2/billing/iu-plan
openapi: 3.1.0
info:
  title: Semicola Exchange platform API
  version: 3.0.0-preview
  description: >-
    Platform endpoints of Semicola: sign-in, signup and OAuth for MCP clients,
    accounts, members and keys, billing, notifications, the Semi assistant (chat
    stream, confirmations, conversations), the MCP App widget host and realtime
    feeds. Typed agent tools live on the MCP server at /mcp/v3.
servers:
  - url: https://api.semicola.com
security:
  - bearerAuth: []
  - sessionCookie: []
tags:
  - name: Auth
  - name: Signup
  - name: OAuth
  - name: Accounts
  - name: Members
  - name: API Keys
  - name: Connected Apps
  - name: Onboarding
  - name: Billing
  - name: AI Usage
  - name: Notifications
  - name: Assistant
  - name: MCP Apps
  - name: Realtime
  - name: Demo
paths:
  /api/v2/billing/iu-plan:
    post:
      tags:
        - Billing
      summary: Choose an IU plan for the billing organization (admins)
      operationId: postBillingIuPlan
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                planKey:
                  type: string
                rateCardVersion:
                  type: string
                accepted:
                  type: boolean
                  const: true
              required:
                - planKey
                - accepted
      responses:
        '201':
          description: Created
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    anyOf:
                      - type: object
                        properties:
                          planKey:
                            type: string
                          rateCardVersion:
                            type: string
                          termStart:
                            type: string
                            format: date-time
                            pattern: >-
                              ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d(?:\.\d+)?(?:Z|([+-](?:[01]\d|2[0-3]):[0-5]\d)))$
                          acceptanceSource:
                            type: string
                            enum:
                              - SIGNUP
                              - PLAN_BILLING
                              - MCP_APP
                              - ADMIN_ORDER_FORM
                              - AUTO_RENEWAL
                        required:
                          - planKey
                          - rateCardVersion
                          - termStart
                          - acceptanceSource
                        additionalProperties: false
                      - type: 'null'
                  error:
                    anyOf:
                      - type: object
                        properties:
                          code:
                            type: string
                          message:
                            type: string
                          field:
                            type: string
                          details: {}
                        required:
                          - code
                          - message
                        additionalProperties: false
                      - type: 'null'
                required:
                  - data
                  - error
                additionalProperties: false
        default:
          description: >-
            Error envelope `{data: null, error: {code, message, field?,
            details?}}`.
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: API key or OAuth access token.
    sessionCookie:
      type: apiKey
      in: cookie
      name: sc_session

````