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Directory / Fit Card

Fit Card

Q: Is Fit Card MCP server safe?

QAmcp's test on 2 Nov 2026: None of the hidden-instruction wordings we know were found in its tool descriptions. Its error messages showed no secrets or internal details. 2 of its 3 tools are labeled read-only; the others may change or send things. Overall it scored 88/100 on 2 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 fitcard.ai · https://fitcard.ai/mcp

Which size to buy in a men's shirt, from shirts he already owns that fit. Real garment measurements.

3 tools✓ no account neededPricing: not listed

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88 /100

PASS · WITH NOTES

11 of 11 checks · 2 Nov 2026

Is Fit Card MCP server safe?

None of the hidden-instruction wordings we know were found in its tool descriptions.
Its error messages showed no secrets or internal details.
2 of its 3 tools are labeled read-only; the others may change or send things.
Overall it scored 88/100 on 2 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 it can do

3 tools, in the server's own words.

size_meread-only

Recommends a size in one shirt for this man, from the shirts he already owns that fit.

what_to_buy

Builds his Fit Card from the shirts he owns and returns the shirts that will fit him, each in the right size, with a buy link.

shirt_measurementsread-only

The real garment measurements of a shirt (chest all the way around and length, in inches) in each size, from the brand's own chart or other checked sources.

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 (2025-11-25). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
note
!
Every tool is described
1 warning
- !shirt_measurements: Inputs with no description: brand, item
note
!
Follows MCP best practices (not scored yet)
1 tip (not scored)
- !1 tool not labeled read-only doesn't say whether running it twice is safe (idempotentHint): what_to_buy
note
✓
ConnectsConnected in 3.8 s
pass
✓
Lists its toolsFound 3 tools
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
- ✓size_me: Answered with an error, probably because of our sample input: None of his shirts are in Fit Card yet, so there's nothing to size from. Not used: test test test (not known yet). He can measure any shirt…
- ✓shirt_measurements: Answered with an error, probably because of our sample input: Fit Card doesn't have test test's garment measurements yet. If he owns one, he can measure it with his phone at https://fitcard.ai.
- –what_to_buy: Not run: labeled as changing data
pass
✓
Bad inputs give a clean error
All good
- ✓size_me: Refused missing required input "shirt" with a clear error
- ✓size_me: Refused wrong type for "shirt" with a clear error
- ✓shirt_measurements: Refused missing required input "brand" with a clear error
- ✓shirt_measurements: Refused wrong type for "brand" with a clear error
pass
✓
Fast enough
All good
- ✓Connecting took 3.8 s
- ✓Listing tools took 95 ms
- ✓Average tool answer: 141 ms
- ✓size_me: Slowest tool: size_me (149 ms)
pass
✓
No secrets leakedChecked 6 error messages: no secrets or internal details
pass
–
Tools work togetherNo safe tool returned data to start a chain from, so chains were not tested (not counted either way)
not tested

Test it yourself

Free and open source. Same checks, same score.

npx qamcp-cli https://fitcard.ai/mcp

Show this score on GitHub

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[![QAmcp score](https://qamcp.dev/s/ai-fitcard-fitcard.svg)](https://qamcp.dev/s/ai-fitcard-fitcard.html)

Score over time

2 Nov 202688

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use Fit Card, signed in with GitHub, one per person. Reviews never change the score.

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