QAmcp

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Directory / EsimTao — Global Travel eSIM Data Calculator, Advisor & Device Checker

EsimTao — Global Travel eSIM Data Calculator, Advisor & Device Checker

Q: Is EsimTao — Global Travel eSIM Data Calculator, Advisor & Device Checker MCP server safe?

QAmcp's test on 11 Nov 2026: None of the hidden-instruction wordings we know were found in its 6 tool descriptions. All 6 of its tools are labeled read-only. Overall it scored 89/100 on 11 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.

by esimtao.com · https://esimtao.com/api/mcp

Calculate travel data needs, check phone eSIM hardware & compare fair GB prices globally.

6 tools✓ all read-only✓ no account neededPricing: not listed

Visit website

89 /100

PASS · WITH NOTES

Partial: 10 of 11 checks · 11 Nov 2026

Test it now for current results

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: 6 tools
Its own safety labels: 6 read-only
Memory it takes: About 1,200 tokens of your AI's memory, just for its tool descriptions
Largest answer: About 0.7 KB in our test
Speed: Average answer in our test: 25 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, 11 Nov 2026.

Is EsimTao — Global Travel eSIM Data Calculator, Advisor & Device Checker MCP server safe?

None of the hidden-instruction wordings we know were found in its 6 tool descriptions.
All 6 of its tools are labeled read-only.
Overall it scored 89/100 on 11 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

Not looked up yet. QAmcp tests how a server behaves. It does not scan source code.

What it can do

6 tools, in the server's own words.

calculate_esim_data_usageread-only

Calculate daily and total gigabyte (GB) data consumption for international travel based on trip duration, map navigation, video streaming, social media, and ho…

check_device_esim_supportread-only

Check whether a specific smartphone or tablet model supports digital eSIM, including hardware differences between US eSIM-only models, mainland China dual phys…

recommend_travel_esim_planread-only

Recommend the optimal travel eSIM plan tier (Daily High-Speed Reset vs Total Data Bucket vs True Unlimited) for 180+ global travel destinations with local tier…

lookup_esim_regional_coverageread-only

Resolve regional travel eSIM bundles (Europe 33, Southeast Asia 8, Latin America, North America, Global) to determine included countries, border-crossing roami…

get_esim_installation_guideread-only

Provide step-by-step QR code scanning, manual SM-DP+ Address / Activation Code entry, and Data Roaming switch settings for iOS (Settings -> Cellular) and Andro…

compare_travel_esim_pricingread-only

Benchmark standard fair market prices per Gigabyte (USD/GB) across Japan, USA, Europe, Southeast Asia, and worldwide to evaluate prepaid eSIM value.

Test results

Safe mode: only tools labeled read-only were run. How the test works

!
Ready for the newest MCP version
1 warning
- !Uses an older MCP version (2025-06-18). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
note
!
Bad inputs give a clean error
12 warnings
- !calculate_esim_data_usage: Accepted missing required input "tripDays" without complaining
- !calculate_esim_data_usage: Accepted wrong type for "tripDays" without complaining
- !check_device_esim_support: Accepted missing required input "brand" without complaining
- !check_device_esim_support: Accepted wrong type for "brand" without complaining
- !recommend_travel_esim_plan: Accepted missing required input "destination" without complaining
- !recommend_travel_esim_plan: Accepted wrong type for "destination" without complaining
- !lookup_esim_regional_coverage: Accepted missing required input "region" without complaining
- !lookup_esim_regional_coverage: Accepted wrong type for "region" without complaining
- and 4 more
note
!
Follows MCP best practices (not scored yet)
1 tip (not scored)
- !6 tools answer with structured data but don't declare its shape (outputSchema): calculate_esim_data_usage, check_device_esim_support, recommend_travel_esim_plan, lookup_esim_regional_coverage, get_esim_installation_guide, compare_travel_esi
note
✓
ConnectsConnected in 202 ms
pass
✓
Lists its toolsFound 6 tools
pass
✓
Every tool is describedAll 6 tools and their inputs are described
pass
✓
Tools are labeled safe or dangerousEvery tool has a safety label
pass
✓
No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.
pass
✓
Tools work with good inputs
All good
- ✓calculate_esim_data_usage: Worked (15 ms)
- ✓check_device_esim_support: Worked (28 ms)
- ✓recommend_travel_esim_plan: Worked (26 ms)
- ✓lookup_esim_regional_coverage: Worked (36 ms)
- ✓get_esim_installation_guide: Worked (30 ms)
- ✓compare_travel_esim_pricing: Worked (12 ms)
pass
✓
Fast enough
All good
- ✓Connecting took 202 ms
- ✓Listing tools took 14 ms
- ✓Average tool answer: 25 ms
- ✓lookup_esim_regional_coverage: Slowest tool: lookup_esim_regional_coverage (36 ms)
pass
–
Tools work togetherNo tool's answer could be fed into another tool, so there were no chains to test (not counted either way)
not tested
–
No secrets leakedNo error messages to check
not tested

Test it yourself

Free and open source. Same checks, same score.

npx qamcp-cli https://esimtao.com/api/mcp

Show 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.

[![QAmcp score](https://qamcp.dev/s/com-esimtao-mcp.svg)](https://qamcp.dev/s/com-esimtao-mcp.html)

Score over time

11 Nov 202689

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use EsimTao — Global Travel eSIM Data Calculator, Advisor & Device Checker, signed in with GitHub, one per person. Reviews never change the score.

Is this your server? Get an alert the moment it breaks.

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.

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