What should an exchange-rate audit trail include?
A practical trail includes date, pair, reference rate, source URL, retrieval date, and a repeatable API or CSV link.
Audit trail FX evidence
Exchange-rate audit trail for invoices and reports
Create a citation-first exchange-rate audit trail with source URL, API URL, CSV URL, spreadsheet formula, and optional PDF proof workflow.
Reference answer
USD/EUR on 2026-06-03 can be cited with a rate page, API URL, CSV URL, Google Sheets formula, and optional PDF proof so a reviewer can reproduce the historical reference-rate trail.
GET https://fxpeek.com/api/history?from=USD&to=EUR&date=2026-06-03
GET https://fxpeek.com/api/csv?from=USD&to=EUR&days=365
=IMPORTDATA("https://fxpeek.com/api/csv?from=USD&to=EUR&days=365")When to use this tool
Use this page when a reviewer needs to see where a dated exchange-rate value came from, how it can be reproduced, and which source URL was used.
- One place for citation, API, CSV, and Google Sheets source text.
- Optional PDF proof workflow for records that need an attachment.
- Designed for review notes, not for claiming official accounting treatment.
Workflow
- Choose date and pair
- Copy citation and source URLs
- Generate PDF proof only if needed
- Store the evidence with the invoice or report
FAQ
Is FXpeek an audit authority?
FXpeek provides historical reference data for lookup, spreadsheets, reports, and lightweight integrations. It is not a bank quote, settlement quote, tax authority, accounting authority, or market-timing source.