> ## 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.

# Cards on file



## OpenAPI

````yaml /openapi/v3.yaml get /api/v2/billing/payment-methods
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/payment-methods:
    get:
      tags:
        - Billing
      summary: Cards on file
      operationId: getBillingPaymentMethods
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    anyOf:
                      - type: array
                        items:
                          type: object
                          properties:
                            id:
                              type: string
                            brand:
                              type:
                                - string
                                - 'null'
                            last4:
                              type:
                                - string
                                - 'null'
                            exp:
                              type:
                                - string
                                - 'null'
                            status:
                              type: string
                              enum:
                                - pending_verification
                                - verified
                                - detached
                          required:
                            - id
                            - brand
                            - last4
                            - exp
                            - status
                          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

````