QAmcp

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Directory / factstable

factstable

Q: Is factstable MCP server safe?

QAmcp's test on 8 Nov 2026: None of the hidden-instruction wordings we know were found in its 86 tool descriptions. 0 of its 60 tools are labeled read-only; the others may change or send things. Overall it scored 77/100 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.

by factstable.com · https://factstable.com/mcp

Verified fact packs for agents: statutory rates, passenger rights, consumer law — cite-or-refuse.

86 tools✓ no account neededPricing: not listed

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77 /100

PASS · WITH NOTES

Partial: 8 of 11 checks · 8 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: 86 tools
Its own safety labels: 0 read-only, 86 with no label
Memory it takes: About 4,000 tokens of your AI's memory, just for its tool descriptions
Tools that look alike: 12 pairs of tools with nearly the same description, so the AI may pick the wrong one

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 factstable MCP server safe?

None of the hidden-instruction wordings we know were found in its 86 tool descriptions.
0 of its 60 tools are labeled read-only; the others may change or send things.
Overall it scored 77/100 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

60 tools, in the server's own words.

benefitsuk_get_fact

Get one verified fact from the benefitsuk pack.

benefitsuk_list_facts

List fact ids + verification states (benefitsuk).

benefitsuk_changes

Recent verification changelog (benefitsuk).

bereavementuk_get_fact

Get one verified fact from the bereavementuk pack.

bereavementuk_list_facts

List fact ids + verification states (bereavementuk).

bereavementuk_changes

Recent verification changelog (bereavementuk).

broadbanduk_get_fact

Get one verified fact from the broadbanduk pack.

broadbanduk_list_facts

List fact ids + verification states (broadbanduk).

broadbanduk_changes

Recent verification changelog (broadbanduk).

cancelflow_get_fact

Get one verified fact from the cancelflow pack.

cancelflow_list_facts

List fact ids + verification states (cancelflow).

cancelflow_changes

Recent verification changelog (cancelflow).

childcareuk_get_fact

Get one verified fact from the childcareuk pack.

childcareuk_list_facts

List fact ids + verification states (childcareuk).

childcareuk_changes

Recent verification changelog (childcareuk).

credituk_get_fact

Get one verified fact from the credituk pack.

credituk_list_facts

List fact ids + verification states (credituk).

credituk_changes

Recent verification changelog (credituk).

debtuk_get_fact

Get one verified fact from the debtuk pack.

debtuk_list_facts

List fact ids + verification states (debtuk).

debtuk_changes

Recent verification changelog (debtuk).

deposituk_get_fact

Get one verified fact from the deposituk pack.

deposituk_list_facts

List fact ids + verification states (deposituk).

deposituk_changes

Recent verification changelog (deposituk).

and 36 more

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 (2024-11-05). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
note
!
Every tool is described
1162 warnings
- !benefitsuk_get_fact: Inputs with no description: fact_id
- !bereavementuk_get_fact: Inputs with no description: fact_id
- !broadbanduk_get_fact: Inputs with no description: fact_id
- !cancelflow_get_fact: Inputs with no description: fact_id
- !childcareuk_get_fact: Inputs with no description: fact_id
- !credituk_get_fact: Inputs with no description: fact_id
- !debtuk_get_fact: Inputs with no description: fact_id
- !deposituk_get_fact: Inputs with no description: fact_id
- and 32 more
note
!
Tools are labeled safe or dangerous
1 warning
- !86 of 86 tools have no safety label (read-only or dangerous): benefitsuk_get_fact, benefitsuk_list_facts, benefitsuk_changes, bereavementuk_get_fact, bereavementuk_list_facts, bereavementuk_changes, broadbanduk_get_fact, broadbanduk_list_fa
note
!
Follows MCP best practices (not scored yet)
2 tips (not scored)
- !86 tools not labeled read-only don't say whether running them twice is safe (idempotentHint): benefitsuk_get_fact, benefitsuk_list_facts, benefitsuk_changes, bereavementuk_get_fact, bereavementuk_list_facts, bereavementuk_changes and 80 mor
- !86 tools don't say whether they reach outside services like the web (openWorldHint): benefitsuk_get_fact, benefitsuk_list_facts, benefitsuk_changes, bereavementuk_get_fact, bereavementuk_list_facts, bereavementuk_changes and 80 more
note
✓
ConnectsConnected in 752 ms
pass
✓
Lists its toolsFound 86 tools
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
✓
Fast enough
All good
- ✓Connecting took 752 ms
- ✓Listing tools took 129 ms
pass
–
Tools work with good inputs
Not tested
- –benefitsuk_get_fact: Not run: no safety label (if you own this server, test again in owner mode)
- –benefitsuk_list_facts: Not run: no safety label (if you own this server, test again in owner mode)
- –benefitsuk_changes: Not run: no safety label (if you own this server, test again in owner mode)
- –bereavementuk_get_fact: Not run: no safety label (if you own this server, test again in owner mode)
- –bereavementuk_list_facts: Not run: no safety label (if you own this server, test again in owner mode)
- –bereavementuk_changes: Not run: no safety label (if you own this server, test again in owner mode)
- –broadbanduk_get_fact: Not run: no safety label (if you own this server, test again in owner mode)
- –broadbanduk_list_facts: Not run: no safety label (if you own this server, test again in owner mode)
- and 32 more
not tested
–
Bad inputs give a clean errorNot tested
not tested
–
Tools work togetherNo safe tool returned data to start a chain from, so chains were not tested (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://factstable.com/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-factstable-factstable.svg)](https://qamcp.dev/s/com-factstable-factstable.html)

Score over time

8 Nov 202677

One test so far. New tests will show here.

Reviews

Coming soon: reviews from people who use factstable, 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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