> ## Documentation Index > Fetch the complete documentation index at: https://docs.telnesstech.com/llms.txt > Use this file to discover all available pages before exploring further. # List Travel eSIM countries > List all countries and regions available across travel eSIM product offerings. Returns a deduplicated list of countries with their names and ISO codes, plus regions that appear on offerings with their constituent country codes. ## OpenAPI ````yaml /api-reference/bundled_openapi.json get /product-offerings/countries openapi: 3.1.0 info: title: Telness Tech Connect version: 2.0.0-alpha description: > Telness Tech Connect API provides all you need to own your user's connectivity experience. Go back to [Telnesstech.com](https://telnesstech.com) servers: - url: https://apiv2.example.com description: Connect API URL for your domain security: - apiKey: [] - bearerAuth: [] apiKey: [] tags: - name: Auth description: Authenticate users and obtain access tokens. - name: Users description: Manage users. - name: Customers description: Manage customers. - name: Subscriptions description: Manage subscriptions and subscription. - name: Subscription Addons description: Manage subscription addons. - name: Subscription Usage description: Get subscription usage. - name: Subscribers description: Manage subscribers. - name: Licenses description: Manage licenses. - name: Product Offerings description: Browse product offerings. - name: Product Catalogs description: Browse product catalogs. - name: Product Discounts description: Discounts and promotions. - name: Orders description: Manage orders and line items. - name: Payment Intents description: >- Inspect payment intents, the money collected over card rails for orders and renewals. - name: Payment Links description: Create and manage payment links for orders and invoices. - name: Payment Sessions description: Create and manage payment sessions for orders. - name: Payment Profiles description: Manage customer payment profiles and methods. - name: Payment Profile Sessions description: Create sessions for setting up payment profiles. - name: Signing sessions description: Handle contract signing sessions for postpaid orders. - name: Porting description: Manage number porting for subscriptions. - name: Taxes description: Calculate taxes for products and line items. - name: Invoices description: Manage invoices and invoice items. - name: Tools description: >- Tools for address validation, number porting, device info, and network coverage. - name: Inventory description: Manage phone number inventory, SIM cards, and reservations. - name: Workflows description: Dynamic processing of customer journeys and events. paths: /product-offerings/countries: get: tags: - Product Offerings summary: List Travel eSIM countries description: > List all countries and regions available across travel eSIM product offerings. Returns a deduplicated list of countries with their names and ISO codes, plus regions that appear on offerings with their constituent country codes. operationId: listProductOfferingCountries parameters: - in: query name: customerType required: true schema: $ref: '#/components/schemas/CustomerType' description: Filter by customer type. responses: '200': description: A list of countries and regions available across product offerings. content: application/json: schema: type: object required: - countries - regions additionalProperties: false properties: countries: type: array items: type: object required: - code - name additionalProperties: false properties: code: type: string description: ISO 3166-1 alpha-3 country code. example: USA name: type: string description: The English name of the country. example: United States regions: type: array items: type: object required: - region - countries additionalProperties: false properties: region: type: string description: The region identifier. example: EUROPE countries: type: array items: type: string description: >- ISO 3166-1 alpha-3 country codes available within this region. example: - SWE - DEU - FRA '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '429': $ref: '#/components/responses/TooManyRequests' '500': $ref: '#/components/responses/InternalServerError' components: schemas: CustomerType: type: string description: The type of customer. enum: - CONSUMER - BUSINESS Error: type: object required: - message - code properties: message: type: string description: A human-readable message providing more details about the error. code: type: string description: A machine-readable code for the error. details: type: array description: Additional details about the error. items: type: object required: - message - code properties: message: type: string description: >- A human-readable message providing more details about the error. code: type: string description: A machine-readable code for the specific detail. property: type: string description: The property or field related to the error. suggestion: $ref: '#/components/schemas/Any' description: > A suggested value for the particular property. For example, this may be set when validating an address with an alias, suggesting the expected value by the operator. hint: type: string description: A hint to help resolve the error. Any: oneOf: - type: string - type: number - type: boolean - type: object additionalProperties: true - type: array responses: BadRequest: description: The request was malformed or invalid. content: application/json: schema: $ref: '#/components/schemas/Error' Unauthorized: description: Authentication is required to access this resource. content: application/json: schema: $ref: '#/components/schemas/Error' Forbidden: description: Access to this resource is forbidden. content: application/json: schema: $ref: '#/components/schemas/Error' TooManyRequests: description: Too many requests have been sent in a given amount of time. content: application/json: schema: $ref: '#/components/schemas/Error' InternalServerError: description: An unexpected error occurred on the server. content: application/json: schema: $ref: '#/components/schemas/Error' securitySchemes: apiKey: type: apiKey in: header name: X-Api-Key description: > An API key that grants access to the Connect API. You can create and manage API keys in the portal. bearerAuth: type: http scheme: bearer bearerFormat: JWT description: > Bearer authentication with JWT tokens is used to authenticate users. Do note that a valid API keys is also required to access the Connect API to prove that requests are made by a trusted party. Requests with a JWT token is scoped to the permissions of the user the token belongs to, regardless of the API key used. ````