# FX Reference Rates (remote · fx-reference-rates.regnotes.workers.dev)

ECB FX rates, cloud GPU and LLM API prices, World Bank country macro data; pay per call via x402

- Trust score: 70/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `fx-reference-rates.regnotes.workers.dev`: 70/100 (this document), [markdown](https://verifymcp.io/servers/dev-workers-regnotes-fx-reference-rates-fx-reference-rates/fx-reference-rates.md), [page](https://verifymcp.io/servers/dev-workers-regnotes-fx-reference-rates-fx-reference-rates/fx-reference-rates)

## Channel facts

- Endpoint: `https://fx-reference-rates.regnotes.workers.dev/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.1.0`

## 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**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - 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**: 63/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1614 tokens (~179/item across 9 items; 9 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 37/100
  - Stability observed for 11 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 9 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 10 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the FX Reference Rates MCP server?

FX Reference Rates is a hosted endpoint at https://fx-reference-rates.regnotes.workers.dev/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 dev-workers-regnotes-fx-reference-rates-fx-refer 'https://fx-reference-rates.regnotes.workers.dev/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "dev-workers-regnotes-fx-reference-rates-fx-refer": {
      "url": "https://fx-reference-rates.regnotes.workers.dev/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "dev-workers-regnotes-fx-reference-rates-fx-refer": {
      "type": "http",
      "url": "https://fx-reference-rates.regnotes.workers.dev/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.dev-workers-regnotes-fx-reference-rates-fx-refer]
url = "https://fx-reference-rates.regnotes.workers.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "dev-workers-regnotes-fx-reference-rates-fx-refer": {
      "type": "remote",
      "url": "https://fx-reference-rates.regnotes.workers.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add dev-workers-regnotes-fx-reference-rates-fx-refer --url 'https://fx-reference-rates.regnotes.workers.dev/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  dev-workers-regnotes-fx-reference-rates-fx-refer:
    url: "https://fx-reference-rates.regnotes.workers.dev/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "dev-workers-regnotes-fx-reference-rates-fx-refer": {
      "Transport": "http",
      "Url": "https://fx-reference-rates.regnotes.workers.dev/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add dev-workers-regnotes-fx-reference-rates-fx-refer -t streamable-http -u 'https://fx-reference-rates.regnotes.workers.dev/mcp'
```

### Other

```json
{
  "mcpServers": {
    "dev-workers-regnotes-fx-reference-rates-fx-refer": {
      "type": "http",
      "url": "https://fx-reference-rates.regnotes.workers.dev/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 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-03 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-01 (score 68, 0)

- [security] Tool “ai_gpu_prices” rewrote its description, which is the text the model reads
- [security] Tool “ai_llm_prices” rewrote its description, which is the text the model reads
- [security] Tool “convert” rewrote its description, which is the text the model reads
- [security] Tool “macro_country” rewrote its description, which is the text the model reads
- [security] Tool “macro_indicator” rewrote its description, which is the text the model reads
- [security] Tool “macro_rank” rewrote its description, which is the text the model reads
- [security] Tool “rates_historical” rewrote its description, which is the text the model reads
- [security] Tool “rates_latest” rewrote its description, which is the text the model reads
- [security] Tool “rates_timeseries” rewrote its description, which is the text the model reads
- [functional regression] Schema quality: 152 → 179

### 2026-10-31 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-29 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-27 (score 66, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-26 (score 65, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-25 (score 65)

First indexed and scored.

## MCP tools (9)

### `rates_latest` (~134 tokens)

Today's exchange rates (forex reference rates, most recent ECB publication) for ~30 currencies in any base currency, e.g. USD to JPY, CNY, EUR, GBP, HKD, SGD, KRW, INR. Filter with symbols. Returns as_of date and source attribution. Price: $0.001 USDC per request (fixed; one paid HTTP GET = one charge; x402 exact on Base or MPP on Tempo; 4xx errors are not charged).

Input parameters:

- `base` (string): Base currency (default EUR)
- `symbols` (string): Comma-separated currencies (default all)

### `convert` (~134 tokens)

Currency converter: convert an amount between any two of ~30 currencies (e.g. 100 USD to JPY) at the latest ECB reference rate or as of a past date. Returns rate, result and as_of date. Price: $0.001 USDC per request (fixed; one paid HTTP GET = one charge; x402 exact on Base or MPP on Tempo; 4xx errors are not charged).

Input parameters:

- `amount` (number, required): Number
- `date` (string): Optional YYYY-MM-DD
- `from` (string, required): ISO 4217
- `to` (string, required): ISO 4217

### `rates_historical` (~108 tokens)

ECB reference rates on a given date in any base; non-publication days fall back to the previous publication day (as_of). Price: $0.002 USDC per request (fixed; one paid HTTP GET = one charge; x402 exact on Base or MPP on Tempo; 4xx errors are not charged).

Input parameters:

- `base` (string): Base currency (default EUR)
- `date` (string, required): YYYY-MM-DD
- `symbols` (string): Comma-separated currencies

### `rates_timeseries` (~117 tokens)

Daily reference rate series for base/symbol between start and end (max 366 days), with min/max/mean and change. Price: $0.003 USDC per request (fixed; one paid HTTP GET = one charge; x402 exact on Base or MPP on Tempo; 4xx errors are not charged).

Input parameters:

- `base` (string, required): ISO 4217
- `end` (string, required): YYYY-MM-DD
- `start` (string, required): YYYY-MM-DD
- `symbol` (string, required): ISO 4217

### `ai_gpu_prices` (~233 tokens)

Cloud GPU price comparison: hourly list prices of GPU / AI accelerator instances (H100, H200, A100, L40S, L4, A10G, T4, B200, MI300X, Trainium, Inferentia ...) on AWS and Azure in US, EU and Asia regions, on-demand and Azure Spot, ranked by USD per GPU-hour. Filter by gpu model, cloud, region, pricing. Official provider price APIs, refreshed daily. Price: $0.005 USDC per request (fixed; one paid HTTP GET = one charge; x402 exact on Base or MPP on Tempo; 4xx errors are not charged).

Input parameters:

- `cloud` (string): aws or azure
- `gpu` (string): GPU/accelerator model or instance substring, e.g. H100, A100, L4, trainium
- `limit` (integer): 1-100, default 20
- `pricing` (string): on_demand or spot
- `region` (string): e.g. us-east-1, eastus, japaneast

### `ai_llm_prices` (~200 tokens)

LLM API pricing lookup: USD per 1M input, output and cached-input tokens plus context window for ~3,300 models (OpenAI GPT, Anthropic Claude, Google Gemini, DeepSeek, Llama, Mistral, Qwen, xAI ...) across providers (direct, Azure, Bedrock, Vertex, Together, Fireworks ...). Filter by model and provider; sorted by input price. Price: $0.005 USDC per request (fixed; one paid HTTP GET = one charge; x402 exact on Base or MPP on Tempo; 4xx errors are not charged).

Input parameters:

- `limit` (integer): 1-100, default 25
- `model` (string, required): Model name substring, e.g. gpt-5, claude-sonnet, gemini-2.5
- `provider` (string): Provider substring, e.g. openai, anthropic, bedrock

### `macro_country` (~225 tokens)

Country economic profile: latest value and year plus annual history (2005 onward) for 21 World Bank World Development Indicators: GDP (USD), real GDP growth, GDP per capita, GNI per capita PPP, CPI inflation, unemployment, population, exports/imports % GDP, current account % GDP, central government debt % GDP, tax revenue % GDP, real and lending interest rates, FDI inflows % GDP, total reserves, official exchange rate, remittances % GDP, Gini, life expectancy, internet users. Country by ISO3/ISO2 code or name. CC BY 4.0. Price: $0.02 USDC per request (fixed; one paid HTTP GET = one charge; x402 exact on Base or MPP on Tempo; 4xx errors are not charged).

Input parameters:

- `country` (string, required): ISO 3166 alpha-3 or alpha-2 code or country name, e.g. JPN, US, Brazil
- `years` (integer): history years to include, 0-25, default 10

### `macro_indicator` (~181 tokens)

Macroeconomic time series: one World Development Indicator (e.g. inflation_cpi_pct, gdp_growth_pct, central_govt_debt_pct_gdp) for up to 20 countries over a year range, annual values. See free /macro/indicators for keys. CC BY 4.0. Price: $0.01 USDC per request (fixed; one paid HTTP GET = one charge; x402 exact on Base or MPP on Tempo; 4xx errors are not charged).

Input parameters:

- `countries` (string, required): comma-separated ISO3/ISO2 codes, max 20
- `end` (integer): last year, default latest
- `indicator` (string, required): indicator key from /macro/indicators, e.g. inflation_cpi_pct
- `start` (integer): first year, default 2015

### `macro_rank` (~215 tokens)

Country ranking: sort all economies by one World Development Indicator for a year (default: each country's latest value), highest first or lowest first, optionally filtered by World Bank region or income group. Aggregates (World, regions) excluded unless requested. CC BY 4.0. Price: $0.02 USDC per request (fixed; one paid HTTP GET = one charge; x402 exact on Base or MPP on Tempo; 4xx errors are not charged).

Input parameters:

- `aggregates` (string): true to include regional/income aggregates
- `income` (string): income group substring, e.g. High income, Lower middle
- `indicator` (string, required): indicator key from /macro/indicators
- `limit` (integer): 1-300, default 50
- `order` (string): desc (default) or asc
- `region` (string): World Bank region substring, e.g. Latin America, Sub-Saharan
- `year` (integer): year; default latest available per country

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/dev-workers-regnotes-fx-reference-rates-fx-reference-rates/fx-reference-rates#diagnostics

## Score history

- 2026-11-05: 70
- 2026-11-04: 69
- 2026-11-03: 69
- 2026-11-02: 68
- 2026-11-01: 68
- 2026-10-31: 68
- 2026-10-30: 67
- 2026-10-29: 67
- 2026-10-28: 66
- 2026-10-27: 66
- 2026-10-26: 65
- 2026-10-25: 65

## Common questions

### What is the FX Reference Rates MCP server?

FX Reference Rates is an MCP server listed in the public MCP registry as dev.workers.regnotes.fx-reference-rates/fx-reference-rates. ECB FX rates, cloud GPU and LLM API prices, World Bank country macro data; pay per call via x402. This page covers its hosted endpoint (https://fx-reference-rates.regnotes.workers.dev/mcp).

### Is the FX Reference Rates MCP server safe to use?

FX Reference Rates scores 70 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 FX Reference Rates MCP server expose?

FX Reference Rates exposes 9 tools: rates_latest, convert, rates_historical, rates_timeseries, ai_gpu_prices, and 4 more. Their descriptions and schemas cost roughly 1,547 tokens of context every time the server is loaded.

### Does the FX Reference Rates MCP server require authentication?

No. We connected to FX Reference Rates without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the FX Reference Rates MCP server still maintained?

FX Reference Rates 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://fx-reference-rates.regnotes.workers.dev/mcp
- Website: https://fx-reference-rates.regnotes.workers.dev/
- Changelog RSS feed: https://verifymcp.io/servers/dev-workers-regnotes-fx-reference-rates-fx-reference-rates/fx-reference-rates.xml
- Changelog JSON feed: https://verifymcp.io/servers/dev-workers-regnotes-fx-reference-rates-fx-reference-rates/fx-reference-rates.json
- HTML version of this page: https://verifymcp.io/servers/dev-workers-regnotes-fx-reference-rates-fx-reference-rates/fx-reference-rates