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Directory / SimFuse eSIM Storefront
SimFuse eSIM Storefront
by simfuse.app · https://simfuse.app/agentic/mcp
Travel eSIMs for 200+ countries. Browse plans, price a multi-country trip, and open a checkout.
13 of 13 checks · 8 Nov 2026
At a glance
- Runs where
- On their server. What you send to it goes to them.
- What you need
- Nothing: it answered without a login
- Tools
- 15 tools
- Its own safety labels
- 14 read-only, 1 labeled as changing things
- Memory it takes
- About 5,500 tokens of your AI's memory, just for its tool descriptions
- Largest answer
- About 100.3 KB in our test
- Speed
- Average answer in our test: 363 ms
Tokens are an estimate: the characters in its tool names, descriptions and inputs, divided by 4. The exact number depends on your AI model. Safety labels are what the server says about itself. From our latest test, 8 Nov 2026.
Is SimFuse eSIM Storefront MCP server safe?
- None of the hidden-instruction wordings we know were found in its 15 tool descriptions.
- Its error messages showed no secrets or internal details.
- 14 of its 15 tools are labeled read-only; the others may change or send things.
- Overall it scored 88/100 on 8 Nov 2026.
A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.
What this test does not check
- Its source code and packages.
- What a tool quietly does behind the scenes, such as writing a file or calling another service.
- Instructions hidden inside live tool answers. We only look for those in tool descriptions.
- Hidden instructions worded in a way our list doesn't know yet.
- Tools that could change something. Those are read, never run.
What QAmcp can and can't see · How to tell if an MCP server is safe · Hidden instructions · Prompt injection
Known security advisories
It lists no public code, so there is nothing to look up in GitHub Security Advisories or OSV.dev. QAmcp tests how a server behaves. It does not scan source code.
What it can do
15 tools, in the server's own words.
plan-tripread-onlyAnswer "which eSIM should I buy for this trip?".
list-destinationsread-onlyFind the countries SimFuse sells eSIMs for, with the cheapest plan price ("from" price) for each in the currency you ask for.
list-regionsread-onlyDiscover available eSIM regions, including worldwide scopes, with their canonical slugs, display names, member countries and starting prices.
get-destination-inforead-onlyDetails for one destination: its name and codes, region, how many eSIM plans are sold there, the cheapest and most expensive, the smallest and largest data bun…
list-plansread-onlyShow the eSIM plans on sale for one country or region, or search the whole catalog, narrowing by data allowance, validity and price.
get-planread-onlyRead everything about one eSIM plan by its id: data allowance, how long it stays valid, what happens after a fair-use cap, whether hotspot and top-ups are supp…
build-planread-onlyBuild an eSIM plan to the traveller's liking for one destination: how much data, for how many days, optionally which network it runs on and whether calls and t…
get-plan-coverageread-onlyList every country one eSIM plan works in, plus any country of its own region that it leaves out.
check-coverageread-onlyAnswer "does this eSIM plan work in X?" for one destination, as a yes or no rather than a country list.
get-checkout-linkread-onlyGet the page where a person buys one specific eSIM plan, for an assistant to hand them a link.
create-checkout-sessionOpen a checkout session for one or more eSIM plans at frozen prices, using the plan ids that plan-trip, list-plans or get-plan returned.
get-order-statusread-onlyCheck an eSIM order after payment: whether it completed and whether its eSIMs have been provisioned yet.
get-esim-activationread-onlyFetch the installable eSIM(s) for a paid order: the QR code image, the LPA activation string, the SM-DP+ address and activation code for manual entry, one-tap …
check-esim-usageread-onlyHow much data an eSIM has used and how much is left, for one eSIM on a paid order.
list-topup-optionsread-onlyData top-ups that can be added to an eSIM the buyer already has, narrowed to what its network will actually accept.
Test results
Safe mode: only tools labeled read-only were run. How the test works
- !Ready for the newest MCP versionnote
1 warning
- !Uses an older MCP version (2025-11-25). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
- !Tools work with good inputsnote
1 warning
- !list-plans: Answered with about 100 KB of text. Many AI apps cut off tool answers this big, so the AI may never see the end of it.
- –create-checkout-session: Not run: labeled as changing data
- and 13 more
- !Follows MCP best practices (not scored yet)note
1 tip (not scored)
- !The tool list is about 91 KB (roughly 23k tokens). AI apps send it with every message, so it takes that much of the AI's memory before any work starts.
- !Resources and prompts worknote
1 warning ()
- –Could not list resources: the server limited our requests (HTTP 429)
- !Listing resource templates failed: Error POSTing to endpoint: { "message": "Too Many Attempts.", "code": 429 }
- –Could not list prompts: the server limited our requests (HTTP 429)
- ✓ConnectsConnected in 837 mspass
- ✓Lists its toolsFound 15 toolspass
- ✓Every tool is describedAll 15 tools and their inputs are describedpass
- ✓Tools are labeled safe or dangerousEvery tool has a safety labelpass
- ✓No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.pass
- ✓Bad inputs give a clean errorpass
All good
- ✓plan-trip: Refused missing required input "stops" with a clear error
- ✓plan-trip: Refused wrong type for "stops" with a clear error
- ✓list-destinations: Refused wrong type for "search" with a clear error
- ✓list-regions: Refused wrong type for "search" with a clear error
- ✓get-destination-info: Refused missing required input "destination" with a clear error
- ✓get-destination-info: Refused wrong type for "destination" with a clear error
- ✓list-plans: Refused wrong type for "destination" with a clear error
- ✓get-plan: Refused missing required input "plan_id" with a clear error
- and 17 more
- ✓Tools work togetherpass
3 chains working
- ✓list-plans → get-plan-coverage: get-plan-coverage found what list-plans returned (plan_id = "01m6ga91pbzp2yp2h944bbhv7r")
- ✓list-plans → check-coverage: check-coverage found what list-plans returned (plan_id = "01m6ga91pbzp2yp2h944bbhv7r")
- ✓list-plans → get-checkout-link: get-checkout-link found what list-plans returned (plan_id = "01m6ga91pbzp2yp2h944bbhv7r")
- ✓Fast enoughpass
All good
- ✓Connecting took 837 ms
- ✓Listing tools took 333 ms
- ✓Average tool answer: 363 ms
- ✓list-regions: Slowest tool: list-regions (1.4 s)
- ✓No secrets leakedChecked 53 error messages: no secrets or internal detailspass
Test it yourself
Free and open source. Same checks, same score.
npx qamcp-cli https://simfuse.app/agentic/mcpShow this score on GitHub
Free for every server in the directory. Paste this into your README: the badge shows the score from our latest test.
[](https://qamcp.dev/s/app-simfuse-esim-storefront.html)Score over time
- 8 Nov 202688
One test so far. New tests will show here.
Reviews
Coming soon: reviews from people who use SimFuse eSIM Storefront, signed in with GitHub, one per person. Reviews never change the score.
QAmcp Monitor tests it every hour and emails you when it goes down, the score drops, a tool changes or a secret leaks. Free for 1 server, no card.
Have a concern, or want it removed? Ask us and we'll take it off the list. How the directory works