com.worldcitisim/mcp-esim

Worldcitisim eSIM

Is the Worldcitisim eSIM MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-27.

Travel eSIMs for 193 countries. Stripe + Bitcoin checkout. QR by email in 30s. No API key.

alive probed 2026-11-15 · unchanged since 2026-10-27

4tools

1.3ktokens in Claude Opus 5.5

0.7 %of Claude's 200k window

0.5×the median server

378 msto initialize

8 msto list tools

Run it: npx -y @worldcitisim/mcp-esim@0.2.2 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: worldcitisim-esim 0.2.0
Capabilities: tools
Instructions: none
Of a 1M window: 0.1 % of a 1M context window
Count: 1.3k tokens in Claude Opus 5.5, exact, measured 2026-10-27. With the Claude Code prefix mcp__…__ on each tool name: 1.4k. The o200k_base estimate is 804. Counted again when the tool definitions change. Method.
Repository: https://github.com/isabellaliebgott/mcp-esim
Website: https://worldcitisim.com/developers
Registry: active, updated 2026-07-18 · registry entry
Changes: 2 recorded, reachable in 2 of them. A row is added when the result, the tool count or the cost changes.

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.64×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
esim_create_order	582	354	44 %
esim_search_plans	452	275	34 %
esim_check_order	166	101	13 %
esim_get_plan	122	74	9 %

Other registry entries on npmjs.com, the ones next to this name; all of them.

Servers that mention esim.

We add a row when the result changes. A server with no change keeps its last row.

Probed	Result	Init	Tools	Claude	o200k
2026-10-27 06:51	alive	303 ms	4	1.3k	804
2026-10-20 06:39	alive	378 ms	4		804

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.