QAmcp

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Directory / NBP MCP

NBP MCP

Q: Is NBP MCP server safe?

QAmcp's test on 2 Nov 2026: None of the hidden-instruction wordings we know were found in its tool descriptions. 0 of its 5 tools are labeled read-only; the others may change or send things. Overall it scored 93/100 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 mcps.wondel.ai · https://mcp.wondel.ai/nbp/mcp

Official Polish central bank (NBP) exchange rates, currency conversion and gold prices.

5 tools✓ no account neededPricing: not listed

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93 /100

PASS · WITH NOTES

Partial: 8 of 11 checks · 2 Nov 2026

Is NBP MCP server safe?

None of the hidden-instruction wordings we know were found in its tool descriptions.
0 of its 5 tools are labeled read-only; the others may change or send things.
Overall it scored 93/100 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

5 tools, in the server's own words.

nbp_exchange_rates

Get a full NBP (Polish central bank) exchange-rate table against PLN — the latest published table by default, or the table in force on a historical date.

nbp_exchange_rate

Get the official NBP rate for one currency against PLN (Polish złoty) — the latest rate by default, or the rate in force on a historical date.

nbp_rate_series

Get a historical time series of NBP rates for one currency against PLN: either the last N published quotes (last_n, default 30, max 255) or an explicit start_d…

nbp_convert

Convert an amount between two currencies using official NBP mid rates, cross-rated through PLN.

nbp_gold_price

Get the official NBP gold price — PLN per 1 gram of 1000-fineness gold.

Test results

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

!
Tools are labeled safe or dangerous
1 warning
- !5 of 5 tools have no safety label (read-only or dangerous): nbp_exchange_rates, nbp_exchange_rate, nbp_rate_series, nbp_convert, nbp_gold_price
note
!
Follows MCP best practices (not scored yet)
2 tips (not scored)
- !5 tools not labeled read-only don't say whether running them twice is safe (idempotentHint): nbp_exchange_rates, nbp_exchange_rate, nbp_rate_series, nbp_convert, nbp_gold_price
- !5 tools don't say whether they reach outside services like the web (openWorldHint): nbp_exchange_rates, nbp_exchange_rate, nbp_rate_series, nbp_convert, nbp_gold_price
note
✓
ConnectsConnected in 26 ms
pass
✓
Ready for the newest MCP versionUses the latest MCP version (2026-07-28)
pass
✓
Lists its toolsFound 5 tools
pass
✓
Every tool is describedAll 5 tools and their inputs are described
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 26 ms
- ✓Listing tools took 59 ms
pass
–
Tools work with good inputs
Not tested
- –nbp_exchange_rates: Not run: no safety label (if you own this server, test again in owner mode)
- –nbp_exchange_rate: Not run: no safety label (if you own this server, test again in owner mode)
- –nbp_rate_series: Not run: no safety label (if you own this server, test again in owner mode)
- –nbp_convert: Not run: no safety label (if you own this server, test again in owner mode)
- –nbp_gold_price: Not run: no safety label (if you own this server, test again in owner mode)
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://mcp.wondel.ai/nbp/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/ai-wondel-nbp.svg)](https://qamcp.dev/s/ai-wondel-nbp.html)

Score over time

2 Nov 202693

One test so far. New tests will show here.

Reviews

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

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