esim-mcp
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| CHEAPERESIM_API_BASE | No | Base URL of the CheapereSIM API | https://cheaperesim.com |
| CHEAPERESIM_API_TOKEN | No | API token for the two account tools; omit to run in read-only lookup mode | |
| CHEAPERESIM_TIMEOUT_MS | No | Request timeout in milliseconds | 10000 |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Features and capabilities supported by this server
Protocol revision2025-11-25
| Capability | Details |
|---|---|
| tools | {
"listChanged": true
} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| search_destinationsA | Find countries CheapereSIM sells eSIM plans for, by full or partial name. Use this when the user names a place and you need its country code before looking up plans. Do not use it to compare prices or list plans: use list_plans for a single country, or plan_trip for several. |
| list_plansA | List eSIM plans for one country, cheapest first. Use plan_trip instead when the user is visiting more than one country. |
| list_popular_destinationsA | List the destinations travellers buy eSIMs for most often, with a starting price for each. Use this only when the user has not named a destination and wants ideas. If they already named one country use list_plans, and if they named several use plan_trip. |
| plan_tripA | Work out the cheapest way to stay connected across several countries. Compares one regional plan covering the whole trip against buying a local plan per country, and says which is cheaper. Use this whenever the user names more than one destination. |
| get_plan_coverageA | List every country a regional or global plan covers. Takes the group_id from a plan returned by plan_trip or list_plans. Local plans have a null group_id and cover only their own country. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
TDQS
Scored across 5 tools
Each tool has a clearly distinct purpose with explicit usage guidance in descriptions. search_destinations is for country codes, list_plans for single-country plans, list_popular_destinations for suggestions without a destination, get_plan_coverage for plan coverage details, and plan_trip for multi-country comparisons. No two tools overlap in a way that would cause confusion.
All tool names follow a consistent verb_noun pattern in snake_case: search_, list_, list_, get_, plan_. The verbs are imperative and the objects are clear, making the naming uniform and predictable.
With 5 tools, the server is well-scoped for its domain. Each tool covers a distinct aspect of eSIM planning: destination lookup, plan listing, popular suggestions, coverage details, and multi-country trip optimization. The count is neither sparse nor overwhelming.
The tool surface covers the full discovery-to-decision workflow: finding destinations, listing plans, considering popular options, understanding coverage, and comparing multi-country scenarios. There are no obvious dead ends—every user query about eSIM plans can be addressed with these tools.