BNR exchange rates

BNR exchange rates MCP server

Look up the National Bank of Romania's reference exchange rates from your AI assistant: the rate in force on any day since 2005, with the date BNR published it; amounts converted to or from RON; several currencies or a window of fixings at once; and the yearly average ANAF converts foreign income at in the D212. It only reads: no tool writes or is money. Rates stay BNR's exact text (4.2440, never 4.244).

You need nothing: no account and no key. The server reads BNR's public XML files at curs.bnr.ro.

What you can ask

• "What was BNR's euro rate on 14 March 2025?"
• "Convert an invoice of 1,250.50 EUR dated 3 October 2026 to lei, at the last rate BNR published before that date."
• "How much is 10,000 HUF in RON today?"
• "Give me BNR's EUR and USD rates for every banking day of September 2026."
• "Which annual average USD rate goes into my D212 for 2025?"

Install

With Claude Code:

claude mcp add bnr -- npx -y @foreverworks/mcp-bnr

Claude Desktop (Settings, Developer, Edit Config) and most other clients read the same command as JSON:

{

"mcpServers": { "bnr": { "command": "npx", "args": ["-y", "@foreverworks/mcp-bnr"] } } }

Each runs the published package on Node 22.19 or newer. It needs no settings.

From a clone

git clone https://github.com/foreverworks/mcps.git && cd mcps

npm ci && npm run build claude mcp add bnr -- node "$PWD/servers/bnr/dist/index.js"

In a JSON configuration, the command is node and its one argument the full path of servers/bnr/dist/index.js. To share one running copy between several clients over HTTP, see docs/deploying.md.

Configuration

None of its own. The variables every server shares are in docs/configuration.md; a process limited by MCP_EGRESS_ALLOW must allow curs.bnr.ro. Dates are Bucharest dates whatever the host's time zone, so "today" is today in Bucharest.

Tools

Every tool is read: it changes nothing.

Troubleshooting

`input`. The question cannot be answered as asked, and nothing was fetched: a date after today or before 2005, a window over 366 days or 2,000 rates (name fewer currencies or a shorter window), or a conversion with no RON side (convert twice and state both rates). The message names which.

`not_found`: "BNR publishes no ... rate here; it publishes ...". BNR does not publish that currency; the message lists those it does.

`not_found`: "BNR has no rates file for ... yet". A year's file appears with its first fixing, so in the first days of January the new year has no rates of its own: rate and convert take December's last, but rates over a window in the new year and its annual_average wait for that first fixing.

`api`. BNR's server did not answer, even after retries (status 0 is no connection). Try again in a few minutes.

`drift`. BNR answered with something that is not its rates XML, such as an HTML page or a changed format. The server refuses to guess; please report it.

How it works

The source

BNR publishes static XML at curs.bnr.ro, the host its "Curs XML" page names (read 2026-10-18): /nbrfxrates.xml is the latest fixing, and /files/xml/years/nbrfxrates .xml every fixing of a year, the current one included (about 300 KB). A rate is RON per unit, or per 100 units (its multiplier) for HUF, JPY, KRW and a few others.

The old `www.bnr.ro` addresses answer with the HTML home page and status 200, which a reader that checks only the status takes for a year with no rates. Here any answer that is not BNR's rates document fails as drift, and so does a rate that is not a plain decimal.

Fetching. A past year's file never changes, so it is fetched once per process. The current year's and the latest fixing are kept ten minutes, as is a file first read while its year was current, so a year's average is re-read from the final file once the year ends. A request is tried up to three times on a 5xx, a 429 or a dropped connection.

The rate in force on a day

BNR fixes its rates once per banking day, around 13:00 Bucharest. A day's rate is that day's fixing; a weekend, a public holiday, or today before the fixing takes the last fixing before it (in early January, December's last). Every answer carries published_on, the date of the fixing it gave, so you can say which publication you used; today's rate asked before the fixing also carries a note saying so.

Converting an amount

convert takes the amount as a decimal string, so 1250.50 reaches the arithmetic as written. To RON is amount x rate / multiplier; from RON is amount x multiplier / rate (10000 HUF at 1.2354 per 100 is 123.54 RON). The exact result is rounded once, to places (0 to 8, default 2), half up (halves away from zero, as invoices round) unless rounding is half-even. rate_rule picks the fixing, and the answer says which it took:

• in_force (the default) is the rate rate answers: the day's fixing, or the last banking day's.
• last_before is the last fixing strictly before the day. Romania's Fiscal Code converts a foreign-currency invoice at "the last exchange rate communicated by BNR before" the date the VAT is due, so an invoice dated Friday takes Thursday's fixing, and one dated Monday Friday's.

The answer carries the rate as BNR wrote it, its multiplier, its date and a meaning line to paste into a document: "100 EUR = 509.10 RON at BNR's EUR rate 5.0910 RON for 1 EUR, published on 2026-10-16 (in force on 2026-10-16), rounded half-up to 2 places".

Several rates at once

rates answers one series per currency (up to 50 named, or every one BNR published), each with its multiplier and its fixings, oldest first. With date (or nothing, for today), a series holds the rate in force that day, dated by its fixing; with from and to (default today), every fixing in the window, both ends included, or no series and a note saying so. A window is at most 366 days and 2,000 rates (about a year of seven currencies, or every currency for two months), so the answer stays readable. A currency BNR published, but not in the window, is listed in absent; one it never published in the years read is refused, with the codes it does publish.

The annual average

The D212 converts foreign income at "cursul de schimb mediu anual comunicat de Banca Naţională a României". BNR's published annual average ("Serii anuale - valori medii") is the mean of its twelve monthly averages (each the mean of the month's daily rates) at four places, not the mean of the year's daily rates (USD 2022: 4.6885 against 4.6923). The server computes each monthly mean and the annual mean in exact decimals, each rounded once, half up, to four places.

That matches BNR's published values for USD 2020 (4.2440), 2021 (4.1604), 2022 (4.6885) and 2023 (4.5743), and EUR 2022 (4.9315), whether or not the monthly means are rounded first. A year not over yet answers the months so far with complete: false. npx tsx scripts/smoke.ts repeats the USD check against the live files.

Limitations

• BNR's reference rates only, not the ECB's or commercial banks'.
• From 2005, when BNR's XML series start.
• No cross rates. BNR publishes no rate between two other currencies, so one side of a conversion is RON.
• A multiplier change within a month fails the annual average as drift, rather than averaging that month on two bases; none has happened in the files read. A change between months answers with a warning.

Other servers for BNR

Searched 2026-10-18. BNR publishes none, and one community server exists:

• `@pipeworx/mcp-bnr-ro` on npm (0.1.2, 2026-09), served through the Pipeworx gateway beside about 30 shared meta-tools. Its two tools return the latest fixing or a year's fixings, each rate a JavaScript number (4.2440 arrives as 4.244); neither picks the rate in force on a day or computes the annual average.

A second search, on 2026-10-21, found two more that convert an amount to RON:

• anafpy's MCP tools on PyPI.
• `bnr-converter-mcp-server` on PyPI, which also takes the last rate before a date, but takes the amount as a Python float and rounds through one.

Libraries read the same XML without MCP: curs-bnr, bnr-exchange-rate and others on npm, bnrxrate and anafpy's BNR client on PyPI, and itrack/cursbnr and peterlupu/curs-bnr on Packagist.

This one exists for what none of them does: it reads BNR directly, from where its caller runs; it keeps every rate as BNR wrote it; it answers the rate in force on any date, weekends, holidays and the hours before 13:00 included; it converts in exact decimals by a named rounding rule; and it computes the annual average as BNR publishes it and ANAF uses it.