# NBP MCP (remote · mcp.wondel.ai)

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

- Trust score: 59/100 (low)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `mcp.wondel.ai`: 59/100 (this document), [markdown](https://verifymcp.io/servers/ai-wondel-nbp/nbp-mcp.md), [page](https://verifymcp.io/servers/ai-wondel-nbp/nbp-mcp)

## Channel facts

- Endpoint: `https://mcp.wondel.ai/nbp/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 46/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - 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.
  - HTTPS enforcement could not be verified: the plaintext port answered with HTTP 405, which proves neither a plaintext path nor enforcement.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 61/100
  - AI-judged instruction clarity (good).
  - 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.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 10/100
  - Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### 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.

### Claude

```bash
claude mcp add --transport http ai-wondel-nbp 'https://mcp.wondel.ai/nbp/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "ai-wondel-nbp": {
      "url": "https://mcp.wondel.ai/nbp/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "ai-wondel-nbp": {
      "type": "http",
      "url": "https://mcp.wondel.ai/nbp/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.ai-wondel-nbp]
url = "https://mcp.wondel.ai/nbp/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ai-wondel-nbp": {
      "type": "remote",
      "url": "https://mcp.wondel.ai/nbp/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add ai-wondel-nbp --url 'https://mcp.wondel.ai/nbp/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  ai-wondel-nbp:
    url: "https://mcp.wondel.ai/nbp/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "ai-wondel-nbp": {
      "Transport": "http",
      "Url": "https://mcp.wondel.ai/nbp/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add ai-wondel-nbp -t streamable-http -u 'https://mcp.wondel.ai/nbp/mcp'
```

### Other

```json
{
  "mcpServers": {
    "ai-wondel-nbp": {
      "type": "http",
      "url": "https://mcp.wondel.ai/nbp/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-05 (score 59, +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.

### 2026-11-03 (score 58, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-11-02 (score 57)

First indexed and scored.

## MCP tools (5)

### `nbp_exchange_rates` (~206 tokens)

NBP exchange-rate table

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.

Input parameters:

- `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…

### `nbp_exchange_rate` (~255 tokens)

NBP currency rate vs PLN

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.

Input parameters:

- `code` (string, required): 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…

### `nbp_rate_series` (~302 tokens)

NBP currency rate history

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.

Input parameters:

- `code` (string, required): 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…

### `nbp_convert` (~223 tokens)

Convert currencies via NBP rates

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.

Input parameters:

- `amount` (number, required): Amount in the source currency to convert.
- `date` (string): Optional historical date (YYYY-MM-DD). Omit for the latest rates.
- `from` (string, required): 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, required): Target currency code (e.g. EUR, PLN). Case-insensitive.

### `nbp_gold_price` (~243 tokens)

NBP gold price

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.

Input parameters:

- `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.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/ai-wondel-nbp/nbp-mcp#diagnostics

## Score history

- 2026-11-05: 59
- 2026-11-04: 58
- 2026-11-03: 58
- 2026-11-02: 57

## Common questions

### 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.

## Links

- Remote endpoint: https://mcp.wondel.ai/nbp/mcp
- Website: https://mcps.wondel.ai/servers/nbp/
- Changelog RSS feed: https://verifymcp.io/servers/ai-wondel-nbp/nbp-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/ai-wondel-nbp/nbp-mcp.json
- HTML version of this page: https://verifymcp.io/servers/ai-wondel-nbp/nbp-mcp