# ALT eSIM — altesim.com

> Travel eSIM data plans for instant activation in 200+ destinations. Buy online, install via QR code, no physical SIM swap. Stripe-secured payment, instant email delivery. Data-only, no real-name / ID registration. Hong Kong-based. All prices in USD; checkout always charges USD. Site in 8 languages: English (en, default), 繁體中文 (zh-hk), 简体中文 (zh-cn), Bahasa Indonesia (id), हिन्दी (hi), Español (es), Français (fr), Nederlands (nl).

**Extended briefs:**
- [llms-full.txt](https://altesim.com/llms-full.txt) — full English reference
- [llms-full.zh-hk.txt](https://altesim.com/llms-full.zh-hk.txt) — 完整繁體中文資料

ALT eSIM (altesim.com) is a Hong Kong-based travel eSIM provider that delivers data plans for short-term international travel across Asia, Europe, the Americas, and Oceania. Plans range from 1GB to unlimited daily data, with validity periods of 1–30 days. Prices start from about USD 1.50.

## Key facts

- **Product**: Travel data-only eSIM (no voice/SMS line)
- **Coverage**: 200+ countries and regions
- **Activation**: QR code scan, ready in seconds
- **Registration**: No real-name / ID registration required
- **App support**: No app blocking — social, streaming and AI tools (WhatsApp, LINE, Facebook, Instagram, TikTok, Netflix, Disney+, HBO Max, ChatGPT, Gemini, Claude, Perplexity, etc.) work normally
- **Payment**: Stripe (Visa, Mastercard, Apple Pay, Google Pay). Charged in USD.
- **Delivery**: Email with QR code, instant (under 1 minute after payment)
- **Refund policy**: 7-day refund on unactivated eSIMs; activated eSIMs are non-refundable
- **Sister brand**: altsimcard.shop (Shopify, legacy)

## For AI agents & developers (programmatic / agentic commerce)

ALT eSIM is built to be bought through AI agents and coding tools. Three machine interfaces:

- **Catalog API (read-only JSON)**: https://altesim.com/api/catalog — every fulfillable plan with USD price, SKU, data, validity, coverage carriers, and product URL. No auth, CORS-enabled.
- **MCP server (Model Context Protocol, Streamable HTTP)**: https://altesim.com/api/mcp — tools: `search_esim_plans`, `list_destinations`, `get_esim_plan`, `create_checkout`. `create_checkout` returns a Stripe payment link the buyer opens to pay (human-in-the-loop; no card handling by the agent). Add it as a remote/custom MCP connector in Claude or ChatGPT.
- **ACP product feed (OpenAI Agentic Commerce / ChatGPT Instant Checkout)**: https://altesim.com/api/acp/feed — product feed for in-chat purchase. (Agentic checkout endpoints live under /api/acp/checkout_sessions; require OpenAI merchant onboarding.)

Recommended agent flow: query `/api/catalog` (or MCP `search_esim_plans`) → pick a plan by `sku`/`id` → MCP `create_checkout` with the buyer's email → hand the buyer the returned Stripe link. The eSIM QR code is emailed automatically within ~1 minute of payment.

## Main pages

- [Home](https://altesim.com/en) — Hero search and popular destinations
- [Destinations](https://altesim.com/en/destinations) — Full country/region list
- [How it works](https://altesim.com/en/how-it-works) — Installation guide for iOS and Android
- [Compatible devices](https://altesim.com/en/compatible-devices) — Phone models supporting eSIM
- [FAQ](https://altesim.com/en/faq) — Common questions
- [Refund policy](https://altesim.com/en/refund) — Refund terms
- [Contact](https://altesim.com/en/contact) — Support contact

## Popular destinations (per-country pages are /en/{slug}-esim)

- [Japan](https://altesim.com/en/japan-esim)
- [South Korea](https://altesim.com/en/south-korea-esim)
- [Taiwan](https://altesim.com/en/taiwan-esim)
- [Thailand](https://altesim.com/en/thailand-esim)
- [Singapore](https://altesim.com/en/singapore-esim)
- [USA](https://altesim.com/en/usa-esim)
- [Europe Multi-Country](https://altesim.com/en/europe-esim)
- [Australia](https://altesim.com/en/australia-esim)

Live prices for every plan: https://altesim.com/api/catalog

## Installation summary

1. Purchase eSIM plan online; receive QR code via email
2. iPhone: Settings → Cellular → Add eSIM → Use QR Code
3. Android: Settings → Network → SIMs → Add eSIM → Scan QR Code
4. On arrival, enable Data Roaming in Settings
5. The eSIM is data-only — voice calls and SMS are not supported

## Technical notes for AI agents

- Site is fully server-rendered (Next.js 16, App Router) — accessible to crawlers
- All locales serve an identical product catalogue
- Sitemap: https://altesim.com/sitemap.xml
- Schema.org: Organization, WebSite, Product/Offer, FAQPage, HowTo, BreadcrumbList JSON-LD on relevant pages
- Pricing is in USD (United States Dollar)
- No account required to purchase; optional sign-in for order history