If you have ever needed "the ECB rate on the invoice date" for a tax return, a customs form, a transfer-pricing file or an audit, you know the problem. The number exists. It is public. And it is scattered across a hundred central-bank websites, each with its own PDF, XML feed, Excel download or HTML table, each with its own idea of which way round a rate should be quoted.

We spent most of this year collecting those tables into one pipeline. As of this week the full history is a public dataset on Hugging Face:

https://huggingface.co/datasets/AllRatesToday/central-bank-exchange-rates

Rows 15,848,587

Institutions 123 central banks + 4 tax authorities

Earliest date 1914 (Swiss National Bank)

Currencies 215 base, 202 quote

Refresh daily, from the GitHub source repo

License CC BY-NC 4.0 (non-commercial, attribution)

Size 515 MB CSV, auto-converted to Parquet

Why "official" rates and not market rates

Most exchange-rate datasets are market data: a mid-market snapshot from some aggregator at some time of…