# WorldCitiSim

> Prepaid travel eSIM provider operated by Paralinq International. 200+ plans covering 193 countries + 6 regions + 1 global plan. Instant QR-code activation delivered by email. No roaming fees, no physical SIM, works on all eSIM-compatible devices (iPhone XS and newer, most recent Android).

We also sell **StayVerified**, a UK SMS-only eSIM that gives you a real UK mobile number for receiving verification codes (2FA, banks, dating apps, ride-share) while abroad. 1 / 6 / 12 / 24 month terms, no auto-renewal.

## What we sell

- **Single-country eSIMs** — 193 countries. Per-country Days × GB matrix. Data only.
- **Regional eSIMs** — Europe, Asia, Latin America, MENA, Balkans, Caribbean.
- **Global eSIM** — one plan covering 100+ countries.
- **StayVerified** — UK SMS-only line for OTP / verification codes while travelling.

All prepaid. Fixed data allowance and duration. Activated by scanning a QR code delivered by email within ~30 seconds of payment.

## Key human pages

- [Home](https://worldcitisim.com/)
- [eSIM catalog](https://worldcitisim.com/esim)
- [StayVerified SMS-only](https://worldcitisim.com/stayverified)
- [FAQ](https://worldcitisim.com/faq)
- [Cart](https://worldcitisim.com/cart) — Stripe + Bitcoin checkout
- [Affiliate program](https://worldcitisim.com/affiliate)
- [Contact](https://worldcitisim.com/contact)
- [Developer portal](https://worldcitisim.com/developers) — API, MCP, Custom GPT, Skill

## Brand

- Tagline: *Hop cities, not SIM cards.*
- Operator: Paralinq International LLC.
- Colors: coral, teal, cream.

## For agents + automation

We're built for AI-agent integration. Four discovery surfaces:

### REST API (anonymous, OpenAPI 3.1)

- Catalog: `GET https://shop.worldcitisim.com/wp-json/esim/v1/plans` (ETag/304-aware, 60s revalidate)
- Order create: `POST https://shop.worldcitisim.com/wp-json/esim/v1/orders` (`payment_method: "stripe"` returns a hosted checkout URL; `"btc"` returns address+sats+QR for in-cart rendering)
- Order status poll: `GET https://shop.worldcitisim.com/wp-json/esim/v1/orders/{id}?token=...`
- OpenAPI spec: [shop.worldcitisim.com/wp-json/esim/v1/openapi.json](https://shop.worldcitisim.com/wp-json/esim/v1/openapi.json) (also at the well-known alias [worldcitisim.com/.well-known/openapi.json](https://worldcitisim.com/.well-known/openapi.json))

### MCP server (Claude Desktop, Claude Code, Cursor, Windsurf, ChatGPT Developer Mode)

- npm package: [`@worldcitisim/mcp-esim`](https://www.npmjs.com/package/@worldcitisim/mcp-esim)
- Install: `claude mcp add --scope user wcs-esim npx -y @worldcitisim/mcp-esim`
- 4 tools: `esim_search_plans`, `esim_get_plan`, `esim_create_order`, `esim_check_order`
- Discovery manifests (SEP-1649 + SEP-1960):
  - [worldcitisim.com/.well-known/mcp](https://worldcitisim.com/.well-known/mcp)
  - [worldcitisim.com/.well-known/mcp/server-card.json](https://worldcitisim.com/.well-known/mcp/server-card.json)
- MCP Registry name: `com.worldcitisim/mcp-esim`

### Custom GPT (ChatGPT)

- WorldCitiSim eSIM Assistant — find + buy plans through ChatGPT. Listed in the GPT Store under Productivity → Travel. (Public URL added once submitted.)

### Claude Skill

- `worldcitisim-esim` plugin — install via Claude Code or platform.claude.com/plugins. Pairs with the MCP server above. (Submission link added once approved.)

## Sitemaps

- [worldcitisim.com/sitemap.xml](https://worldcitisim.com/sitemap.xml) — apex Next storefront (213 URLs: home + catalog + 193 country PDPs + StayVerified + B2B + legal)
- [shop.worldcitisim.com/sitemap_index.xml](https://shop.worldcitisim.com/sitemap_index.xml) — WP backend (admin + WP REST API surface)

## What we do NOT want indexed

- `/cart`, `/account/`, `/checkout` confirmation paths (per `worldcitisim.com/robots.txt`)
- The WP admin at `shop.worldcitisim.com/wp-admin/*`

## Operator + ownership

- Operator: Paralinq International LLC, 16192 Coastal Highway, Lewes, DE 19958, USA
- Customer support: [support@worldcitisim.com](mailto:support@worldcitisim.com)
- Partnerships: [hello@worldcitisim.com](mailto:hello@worldcitisim.com)
- GitHub (public surface): [github.com/easyname889/worldcitisim-frontend](https://github.com/easyname889/worldcitisim-frontend)

## Versioning + change log

- API version pinned in URL: `/wp-json/esim/v1/*` — backwards-compatible additions only. Breaking changes get `/v2/`.
- Each plugin keeps its own CHANGELOG.md (see the GitHub repo).
- The `/llms.txt` document itself is versioned alongside the apex Next deploys; updates land within minutes of a site deploy.