Four official euro rates, one Sunday, zero agreement
Your accountant knows which exchange rate to use. Finding it is the hard part: four official sources gave four euro rates for one Sunday.
5 min read
#exchange-rates
Financial systems lab
Turning financial chaos into systems that add up
Terabytes of financial data and still no answers? Blockchain transactions, acquiring, Stripe, Shopify, bank statements and service logs all add up to noise. This site is a working lab: browser tools that clean that data, and notes on the ledgers, reconciliation and AI/MCP wiring behind them.
The Interactive Lab
Working tools in the browser. What is live, is live; what isn't, says so.
Audio & Video Transcription
Recordings and meetings into text with timestamps.
anonymous · 3 minutes of audio, 1 file a day
account · 30 minutes a day, 10 files, and raisable
live
Exchange Rates with Proof
Official rates on a date, yearly and monthly averages, and market prices right now, with the source behind every number.
anonymous · 20 lookups a day on the site, 1,000 API requests a day
account · Unlimited lookups, 10,000 API requests a day, history and export
beta
Anonymizer
Mask sensitive values in Excel/CSV files, entirely in your browser.
anonymous · No limits -- processing happens in your browser
account · Same as anonymous -- there is no server-side limit to raise
beta
PDF Unlocker & Document Prep
Strip owner passwords off statements so parsers can read them.
anonymous · 1 file, up to 10 MB
account · Batch upload, table structure detection
In development
Voice-to-Structured-Data
A spoken brain dump into JSON your ledger can ingest.
anonymous · Up to 3 minutes
account · No duration cap, direct push to an MCP server
In development
Financial Transaction Sanitizer
Paste a messy transaction log, get one normalised stream.
anonymous · Up to 500 rows per run
account · Up to 100 000 rows per run
In development
Blog
Articles and notes on financial systems, management accounting, AI and the tools behind alsok.org.
This site is a personal research lab: tools built because the problem hurt enough. Behind it is one engineer.