NBP MCP
REMOTE · MCP.WONDEL.AI
Official Polish central bank (NBP) exchange rates, currency conversion and gold prices.
Available components
Last scanned (8 hours ago)
Scores higher than 43% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Finance and Payments
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security46
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 5 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS enforcement could not be verified: the plaintext port answered with HTTP 405, which proves neither a plaintext path nor enforcement. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability61
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1333 tokens (~266/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management10
- Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 5 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 3 Nov 26 +1
- Stability: unverified → 0.03 ▲ functional
- 2 Nov 26 57
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://mcp.wondel.ai/nbp/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=wondel.ai | CN=WE1,O=Google Trust Services,C=US | 23 Oct 2026 | 21 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | 5d95ed90e58a72d50e0abf92b4ea9de1 |
| SANs: wondel.ai, mcp.wondel.ai, *.mcp.wondel.ai | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.wondel.ai. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| ai. | present | 1814, 3799 | 8, 8 | Verified |
| wondel.ai. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.wondel.ai/nbp/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.wondel.ai/nbp/mcp | Inconclusive | 405 |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
nbp_convert Convert currencies via NBP rates ~223
Convert an amount between two currencies using official NBP mid rates, cross-rated through PLN. Supports PLN and every currency NBP quotes: table A is used first and table B (exotic currencies, published Wednesdays) is consulted automatically for codes A doesn't carry — each side of the response shows the rate, table and effectiveDate used. Latest rates by default, or historical with date. NBP publishes only on Polish business days — on weekends/holidays the request falls back to the most recent preceding publication; effectiveDate in the response shows the date actually used.
| Name | Type | Req | Description |
|---|---|---|---|
| amount | number | yes | Amount in the source currency to convert. |
| date | string | – | Optional historical date (YYYY-MM-DD). Omit for the latest rates. |
| from | string | yes | Source currency code (e.g. USD, PLN). Case-insensitive. |
| no_cache | boolean | – | Force a fresh NBP fetch and bypass this server's result cache. Default false. |
| to | string | yes | Target currency code (e.g. EUR, PLN). Case-insensitive. |
No output schema declared.
No examples provided.
nbp_exchange_rate NBP currency rate vs PLN ~255
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. Tables 'a'/'b' return the mid rate; table 'c' returns bid/ask. NBP publishes only on Polish business days — on weekends/holidays the request falls back to the most recent preceding publication; effectiveDate in the response shows the date actually used. Use nbp_rate_series for a multi-day history.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | Three-letter ISO 4217 currency code (e.g. USD, EUR, CHF). Case-insensitive. |
| date | string | – | Optional historical date (YYYY-MM-DD). Omit for the latest rate. |
| no_cache | boolean | – | Force a fresh NBP fetch and bypass this server's result cache. Default false. |
| table | string | – | NBP table: 'a' (default) = official mid rates of ~35 major currencies, published every business day; 'b' = mid rates of ~115 less-traded currencies, published Wednesdays; 'c' = bid/ask (buy/sell) rat… |
No output schema declared.
No examples provided.
nbp_exchange_rates NBP exchange-rate table ~206
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 publishes only on Polish business days — on weekends/holidays the request falls back to the most recent preceding publication; effectiveDate in the response shows the date actually used. Rates data starts 2002-01-02.
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | – | Optional historical date (YYYY-MM-DD). Omit for the latest table. |
| no_cache | boolean | – | Force a fresh NBP fetch and bypass this server's result cache. Default false. |
| table | string | – | NBP table: 'a' (default) = official mid rates of ~35 major currencies, published every business day; 'b' = mid rates of ~115 less-traded currencies, published Wednesdays; 'c' = bid/ask (buy/sell) rat… |
No output schema declared.
No examples provided.
nbp_gold_price NBP gold price ~243
Get the official NBP gold price — PLN per 1 gram of 1000-fineness gold. Latest price by default; or one historical date; or the last N quotes (last_n, max 255); or a start_date/end_date range (max 93 days per query). Published every business day. NBP publishes only on Polish business days — on weekends/holidays the request falls back to the most recent preceding publication; effectiveDate in the response shows the date actually used. Gold data starts 2013-01-02.
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | – | One historical date (YYYY-MM-DD). Mutually exclusive with last_n and the range. |
| end_date | string | – | Range end (YYYY-MM-DD, inclusive). Requires start_date; span ≤ 93 days. |
| last_n | integer | – | Return the last N published prices (1-255). Mutually exclusive with date and the range. |
| no_cache | boolean | – | Force a fresh NBP fetch and bypass this server's result cache. Default false. |
| start_date | string | – | Range start (YYYY-MM-DD, inclusive). Requires end_date. |
No output schema declared.
No examples provided.
nbp_rate_series NBP currency rate history ~302
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_date/end_date window (max 93 days per query — NBP's hard limit; chain calls for longer spans). Quotes exist only for publication days: business days for tables 'a'/'c', Wednesdays for 'b'. Data starts 2002-01-02.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | Three-letter ISO 4217 currency code (e.g. USD, EUR, CHF). Case-insensitive. |
| end_date | string | – | Window end (YYYY-MM-DD, inclusive). Requires start_date; span ≤ 93 days. |
| last_n | integer | – | Return the last N published quotes (1-255). Default 30. Mutually exclusive with start_date/end_date. |
| no_cache | boolean | – | Force a fresh NBP fetch and bypass this server's result cache. Default false. |
| start_date | string | – | Window start (YYYY-MM-DD, inclusive). Requires end_date. |
| table | string | – | NBP table: 'a' (default) = official mid rates of ~35 major currencies, published every business day; 'b' = mid rates of ~115 less-traded currencies, published Wednesdays; 'c' = bid/ask (buy/sell) rat… |
No output schema declared.
No examples provided.
How do I install the NBP MCP server?
NBP MCP is a hosted endpoint at https://mcp.wondel.ai/nbp/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · mcp.wondel.ai
claude mcp add --transport http ai-wondel-nbp 'https://mcp.wondel.ai/nbp/mcp'
What is the NBP MCP server?
NBP MCP is listed in the public MCP registry as ai.wondel/nbp. Official Polish central bank (NBP) exchange rates, currency conversion and gold prices. This page covers its hosted endpoint (https://mcp.wondel.ai/nbp/mcp).
Is the NBP MCP server safe to use?
NBP MCP scores 59 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the NBP MCP server expose?
NBP MCP exposes 5 tools: nbp_exchange_rates, nbp_exchange_rate, nbp_rate_series, nbp_convert, nbp_gold_price. Their descriptions and schemas cost roughly 1,229 tokens of context every time the server is loaded.
Does the NBP MCP server require authentication?
No. We connected to NBP MCP without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the NBP MCP server still maintained?
NBP MCP is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.