Credit Card Payment Reminder & Tracking
Fetches credit card statements from eight Taiwanese banks, logs due dates and amounts in Google Sheets.
What it does
Never miss a payment date as you automatically receive credit card statements from eight Taiwanese banks into your Google Sheets. The system extracts due dates and amounts for each bill, then adds calendar reminders so you can track everything in one place without manual entry. You can also update the status of any payment directly through the provided webhook to keep your records current.
Step by step
- Configure Gmail API triggers to watch for emails containing 'statement' or 'bill' from specific bank domains.
- Define a rigid JSON schema in the LLM prompt that strictly maps extracted fields like due_date and amount_due to standard types.
- Set up Google Sheets with fixed column headers (Date, Bank, Amount, Status) and use the Sheets API to append rows via POST requests.
- Create Google Calendar events using the calculated due date minus a buffer period, ensuring all-day event formatting is applied.
Where the LLM does the work
- Parse unstructured email bodies or PDF attachments to identify the exact total amount due and specific due dates across different bank formats.
- Classify the extracted transaction details to determine if they represent a new bill or a recurring payment, handling ambiguous phrasing.
- Generate natural language summaries for calendar event titles that include both the bank name and the amount for quick user recognition.
Watch out for
Bank email formats change frequently so you must implement fallback regex patterns if the LLM extraction fails on new layouts.
Timezone mismatches can cause late payments so always normalize extracted dates to UTC before creating calendar events.
PDF attachments often require separate processing steps so ensure your pipeline handles binary file decoding before sending text to the LLM.
Tools that fit
The agent brief
Everything your agent needs, including the gotchas. Copy it and go.
You are helping me build the following AI agent workflow. ## Goal Credit Card Payment Reminder & Tracking: Fetches credit card statements from eight Taiwanese banks, logs due dates and amounts in Google Sheets. ## Specification - What it does: Never miss a payment date as you automatically receive credit card statements from eight Taiwanese banks into your Google Sheets. The system extracts due dates and amounts for each bill, then adds calendar reminders so you can track everything in one place without manual entry. You can also update the status of any payment directly through the provided webhook to keep your records current. - Trigger: Triggered by an event (Event · on new email) - Autonomy: Fully hands-off - Expected setup effort: about an afternoon - Tools/services involved: - Gmail: Retrieve credit card statement emails - LLM: Extract payment details from text or PDFs - Google Sheets: Store extracted payment data - Google Calendar: Create and update payment reminders ## Known pitfalls, handle each one explicitly in your implementation 1. Bank email formats change frequently so you must implement fallback regex patterns if the LLM extraction fails on new layouts. 2. Timezone mismatches can cause late payments so always normalize extracted dates to UTC before creating calendar events. 3. PDF attachments often require separate processing steps so ensure your pipeline handles binary file decoding before sending text to the LLM. ## Reference implementation https://n8n.io/workflows/2867 (workflow template) Fetch and inspect this before building. If it matches my stack, adapt it; if not, rebuild the pattern with my tools. ## Process requirements 1. Before building: ask me which of the listed tools I actually use and what my platform is (n8n / Make / code / other). Do not assume. 2. Adapt the pattern to my answers; do not force the reference stack. 3. Address every pitfall above; tell me how you handled each. 4. Provide a test plan I can run before letting this touch real data. 5. Ask before any step that sends messages, modifies data, or spends money. Source: https://usecasesforagents.com/use-case/credit-card-payment-reminder-tracking/ via usecasesforagents.com
Frequently asked questions
Can I use a different Email than Gmail?
Yes. Gmail is only the example email in this recipe. The same flow works with Brevo, KlickTipp, Lemlist and Mailchimp. Swap the email connection and keep the rest of the setup as written.
Want this running in your business?
This is what I do. I design and build AI agents like this one, and keep them running. If you want it set up for your team instead of doing it yourself, get in touch.
Who it's for
Built for anyone who wants this off their own plate, no team or company required.