About Worldcitisim eSIM
Worldcitisim eSIM is an MCP server for searching and ordering WorldCitiSim travel eSIM plans. It supports Stripe checkout links and on-chain Bitcoin payment details, then provides activation data after payment clears.
Key features
- 01Search plans by country, region, duration, and data
- 02Retrieve a plan and its variations
- 03Create orders for Stripe or Bitcoin payment
- 04Check order status and retrieve activation data
- 05Cache catalog responses
Use cases
- 01Compare eSIM plans for a destination and trip length
- 02Place an order and share a Stripe checkout link
- 03Present Bitcoin payment details for an order
- 04Retrieve activation details after payment
MCP support
Exposes tools to MCP clients for searching plans, creating orders, and checking their status. It wraps the WorldCitiSim eSIM API.
Configuration
Local server config is the same for every client. Copy it into your client’s MCP config file.
Tools
4Saved tool list · updated 2w ago
| Parameter | Type | Required | Description |
|---|---|---|---|
| limit | number | No | Max plans to return (default 5, max 20). |
| min_gb | number | No | Minimum data allowance in GB. Use -1 for 'unlimited'. |
| region | string | No | Region slug: 'europe' | 'mena' | 'caribbean' | 'balkans' | 'latam' | 'asia' | 'global'. |
| country | string | No | Two-letter ISO 3166-1 alpha-2 country code (e.g. 'JP', 'ES', 'US') OR a plan slug ('spain', 'japan', 'europe', 'global'). Matched case-insensitively against plan slugs and display names. |
| max_days | number | No | Maximum plan duration in days. |
| min_days | number | No | Minimum plan duration in days. |
Details
From the project README@worldcitisim/mcp-esim
MCP server that lets Claude and other MCP-compatible agents search and buy WorldCitiSim eSIM plans. Wraps https://shop.worldcitisim.com/wp-json/esim/v1/*.
Install
Claude Desktop / Claude Code
claude mcp add --scope user wcs-esim npx -y @worldcitisim/mcp-esim
Or paste into ~/Library/Application Support/Claude/claude_desktop_config.json:
{
"mcpServers": {
"worldcitisim-esim": {
"command": "npx",
"args": ["-y", "@worldcitisim/mcp-esim"]
}
}
}
Cursor / Windsurf / other MCP clients
Same shape — command: "npx", args: ["-y", "@worldcitisim/mcp-esim"].
ChatGPT Developer Mode
Settings → Developer Mode → Add MCP server → same npx command.
Tools exposed
| Tool | Purpose |
|---|---|
esim_search_plans | Filter catalog by country / region / days / GB. Returns matching plans with their first 5 variations. |
esim_get_plan | Fetch one plan by slug with all variations. |
esim_create_order | Create a pending order. payment_method: "stripe" (default) returns a Stripe Checkout URL for the user to tap; payment_method: "btc" returns an on-chain btc block (address + amount + QR) to show the user directly. Both return an order_token for polling. |
esim_check_order | Poll an order's status. Returns activation data (ICCID, QR URL) once payment clears. |
Example interaction
User: I'm going to Japan for 10 days, what eSIM should I get?
Claude calls: esim_search_plans({ country: "japan", min_days: 7, max_days: 15 })
→ returns matching plans with variations priced and in stock.
Claude picks the best match, presents 2–3 options to the user.
User: the 10GB one
Claude: "Pay by card or Bitcoin?"
User: card
Claude calls: esim_create_order({ email: "[email protected]", variation_id: 44941 })
→ returns { order_id, order_token, payment_link_url }.
Claude: "Tap this link to pay: <Stripe URL>. You'll get the eSIM QR in your email within ~30 seconds."
User pays. Claude optionally polls esim_check_order until status=completed.
For Bitcoin, Claude calls esim_create_order({ ..., payment_method: "btc" }) and gets back a
btc block — { address, sats_amount, btc_amount, qr_data_uri, expires_at } — which it shows
the user to pay from any on-chain wallet. No redirect. If BTC is declined for a small order
during a network-fee spike, the call returns a btc_unavailable error and Claude offers card
instead. Either way, esim_check_order polls until status=completed.
Environment
WCS_ESIM_API_BASE— override the API base URL. Default:https://shop.worldcitisim.com/wp-json/esim/v1.
Runtime
- Node 20.11+ (for native fetch + ESM).
- No secrets. No Stripe credentials touch this process. Payment happens on Stripe's hosted checkout page; the MCP just hands the agent the URL.
- Catalog is client-side cached 5 minutes + ETag-aware; multiple search calls within a minute don't hit the network.
Development
npm install
npm run dev # stdio MCP server on this terminal
npm run build # compile to dist/
Point a Claude Code session at the local dev build:
claude mcp add wcs-esim-dev node "$(pwd)/dist/index.js"
Related
- WorldCitiSim — eSIM travel service for 193 countries.
- WorldCitiSim eSIM API — OpenAPI 3.1 spec the server wraps.
License
MIT
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