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

# Start a device authorization the user approves in a browser

> Operation ID: post__codex_subscription_start.



## OpenAPI

````yaml /openapi/itoflow-public.openapi.json post /codex-subscription/start
openapi: 3.1.0
info:
  description: >-
    All Itoflow APIs are experimental and may change without notice. Read-only
    operations marked interactive can be tried from the documentation; the
    others are reference-only.
  title: Itoflow Developer API
  version: 1.0.0
servers:
  - description: Itoflow API
    url: https://api.itoflow.ai
security: []
tags:
  - name: Account
  - name: Billing
  - name: Brokers
  - name: Chat
  - name: Connected MCP servers
  - name: GitHub
  - name: Market data
  - name: Monitors
  - name: Notifications
  - name: Portfolios
  - name: Risk runs
  - name: Sharing and data
  - name: Strategies
paths:
  /codex-subscription/start:
    post:
      tags:
        - Account
      summary: Start a device authorization the user approves in a browser
      description: 'Operation ID: post__codex_subscription_start.'
      operationId: post__codex_subscription_start
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CodexStartAuthorization'
          description: Start a device authorization the user approves in a browser
        '400':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Bad request
        '401':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Authentication required
        '403':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Forbidden
        '404':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Not found
        '500':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Server error
      security:
        - bearerAuth: []
components:
  schemas:
    CodexStartAuthorization:
      additionalProperties: false
      properties:
        expires_at:
          type: string
        interval_seconds:
          type: number
        user_code:
          type: string
        verification_uri:
          type: string
        verification_uri_complete:
          type: string
      required:
        - user_code
        - verification_uri
        - interval_seconds
        - expires_at
      type: object
    Error:
      properties:
        available:
          description: Optional available amount or value
          type: string
        billing_action:
          $ref: '#/components/schemas/BillingAction'
        code:
          description: Machine-readable error code
          type: string
        currentVersion:
          description: Current server-side version, when relevant
          type: number
        details:
          description: Optional structured error details
        error:
          description: Error type or code
          type: string
        expectedVersion:
          description: Client-provided expected version, when relevant
          type: number
        message:
          description: Human-readable error message
          type: string
        requested:
          description: Optional requested amount or value
          type: string
        usage:
          description: Optional usage metadata for limit errors
      required:
        - error
      type: object
    BillingAction:
      description: Action that resolves a billing-related rejection
      properties:
        href:
          type: string
        kind:
          enum:
            - upgrade
            - payment_method
            - spending_cap
            - billing
          type: string
        label:
          type: string
      required:
        - href
        - label
        - kind
      type: object
  securitySchemes:
    bearerAuth:
      bearerFormat: JWT
      description: Itoflow access token issued for the Itoflow API.
      scheme: bearer
      type: http

````

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