• VALIDATED
  • DISCREPANCY
  • RECONCILED
  • REVIEW

How to audit historical transactions with your AI

Connect ExchangeRate-API to your agent to validate old financial entries against real-world currency data.

Ask AI about this page

Short answer

How can I audit historical transactions with my AI?

Your AI pulls the exact exchange rates from the date of a past transaction to see if your recorded values are accurate. This lets you spot discrepancies in old ledgers or invoices. You'll get a clear breakdown of where the math fails.

Audit outcomes.

Where your findings land.

The AI processes the data and organizes the results into these categories.

VALIDATED

Confirmed accuracy

The AI compares your records to historical data. You get a clear confirmation when the math holds up.

DISCREPANCY

Flagged errors

The AI identifies where your recorded rate differs from the actual market rate on that day. You'll see the exact delta.

RECONCILED

Cleaned ledgers

The AI generates a list of corrected values based on the historical rates it found. This makes updating your books easy.

REVIEW

Human oversight

The AI presents the suspicious entries in a list. You decide which ones need manual adjustment or further investigation.

The workflow

What your AI does when the data arrives.

The AI handles the heavy lifting of looking up old rates so you don't have to manually search archives.

  1. Data ingestion

    Your AI reads your transaction list or spreadsheet to identify the currency pairs and the dates involved.

    get_historical_rates

  2. Rate retrieval

    The agent looks up the specific market rates that existed on the exact day of each transaction.

    get_historical_rates

  3. Comparison

    The AI calculates the difference between your recorded amount and the amount calculated using the historical rate.

    get_historical_rates

  4. Reporting

    The agent summarizes the findings, highlighting which transactions are correct and which ones are off.

    get_historical_rates

Try it

Copy these to start.

Use these prompts to kick off the audit.

Starting points

Swap the bracketed text for your actual file names or specific currency pairs.

ExchangeRate-API Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_qIpLIDp6ihnBeYet7Fm2z0gxfT6uDIjaEC3OCvEP/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — ExchangeRate-API capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "exchangerate-api-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_qIpLIDp6ihnBeYet7Fm2z0gxfT6uDIjaEC3OCvEP/mcp"
    }
  }
}
Copy into chat04

  • Audit the transactions in my 'Q3_Expenses.csv' file and flag any rate errors.

  • Check if the USD to EUR rate used in my last invoice matches the historical rate for October 12, 2023.

  • Compare the conversion rates in my 'Vendor_Payments' sheet against the actual rates from last month.

  • Find all transactions in my ledger where the GBP conversion was off by more than 2% compared to the historical rate.

  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Start here

Connect ExchangeRate-API once, then ask.

Just link your account once. Your credentials stay encrypted, and you can immediately start asking your agent to pull rates.

Connect ExchangeRate-API to your AI

FAQ

How this task behaves.

  • 01

    Can the AI change my original transaction records?

    No. The AI only reads your data and compares it to historical rates. It cannot write to or modify your original files or databases.

  • 02

    Does the AI provide the rates for today?

    Yes, it can pull current rates, but for auditing purposes, it focuses on the historical data you request.

  • 03

    Can the AI fix the errors in my spreadsheet automatically?

    No. The AI identifies the discrepancies and shows you the correct values, but you must perform the actual edits to your files.

  • 04

    What happens if a rate isn't available for a specific date?

    The AI will tell you it cannot find a rate for that specific timestamp. It only works with the data provided by the API.

  • 05

    Can I audit multiple currencies at once?

    Yes. You can provide a list of different currency pairs, and the AI will process each one using the historical data.

  • More questions about ExchangeRate-API? The Connector page answers them. See everything the ExchangeRate-API Connector can do

Connect ExchangeRate-API to Claude, Cursor, ChatGPT & more