Exchange rates over MCP
Currency — a published rate, or nothing
An AI asked for Friday's dollar rate will happily produce one for a Sunday. Currency serves Norges Bank's own daily reference rates — 38 currencies against the krone, back to about 1980 — and returns the series exactly as published, with no rate at all on the days the bank did not publish one.
- 38
- currencies, plus NOK
- ~1980
- history begins
- 1
- publication per business day
- Norges Bank
- the source
- World Bank
- buying-power data
- 7
- tools, read-only
The problem it solves
A rate is a fact with a date on it, and that is exactly the kind of fact a language model is worst at. It will give you a plausible number for a day nobody published one. Currency serves the rates Norges Bank actually published, so the number can be checked against the source rather than believed.
The discipline is in the refusal. Norges Bank publishes once per business day, at about 16:00 CET, so weekends, Norwegian holidays and any day it did not publish have no rate. Currency returns the series as published — no carry-forward, no interpolation, no nearest match. What to do about a missing Sunday is a decision for whoever is asking, and it stays with them.
Two further tools price one list price into many markets, and they return two numbers on purpose. The recommended multiplier is capped at 1.0, because the USD price is the most anyone should pay however wealthy their country. The uncapped measurement is returned beside it and goes above 1.0 — Norway measures about 1.10. Applying the raw number to a Norwegian price charges above list, which is the mistake the cap exists to prevent.
Is this the one you want?
We make five of these and they do different jobs. Only this page has a reason to tell you when the answer is one of the others.
| If you want to | Use |
|---|---|
| Read the Hebrew or Greek, and check it | Darash |
| Write a book, study or sermon series and publish it | Junifye |
| Keep the terms you define, with sources and versions | Lexifye |
| Look up a Norwegian company or its accounts | Brreg |
| Read the current text of Norwegian law | Lexar |
| Convert a currency at a published central-bank rate | Currency — this one |
| Just read a Bible, on a phone, offline | BibleRead |
Who it is for
- Anyone whose AI does arithmetic on money and needs the rate to be a published one, with the date it belongs to.
- A developer pricing a product in many countries, who wants a defensible multiplier rather than a guess and needs to know where the policy sits.
- An analyst charting a currency over years, who needs the gaps to stay gaps rather than be quietly filled in.
Questions people ask first
What is Currency?
Currency is a hosted MCP server over Norges Bank's daily exchange rates: the rate between any two of 38 currencies on any date back to about 1980, conversion of an amount, and a daily series for charting. It also serves World Bank buying-power multipliers for pricing one list price into different markets. Seven tools, all read-only.
Do I need to install anything?
No. Currency is an MCP server reached over HTTPS, and you sign in from the browser on first use.
What happens on a weekend or a holiday?
Nothing is returned for that day. Norges Bank publishes once per business day, so those days have no rate, and Currency returns the series as published rather than carrying the previous day forward. That is deliberate: a filled-in value is indistinguishable from a real one once it leaves the service.
Can it convert USD to EUR?
Yes. Norges Bank quotes everything against the krone, so a cross-rate is derived through NOK — arithmetic on two published rates, not a third source.
Are these live trading rates?
No. They are central-bank reference rates, published once a day. They are not dealable prices and are not what a bank or card network will charge you.
Can I try it before paying?
A free Publifye account includes a small daily allowance. Current plans are on the Currency site; this page quotes no price, because prices move and a stale one is worse than none.