An agent replies to new enquiries, asks qualifying questions and books the good ones
Beginner10h1–2
LLMEmailCalendar API
17/20Overdue Invoice Follow-up Agent
An agent drafts polite, escalating payment reminders for overdue invoices.
Beginner10h1–2 people17/20 fit
Build Overdue Invoice Follow-up Agent for freelancers and small agencies in ~10h with 1–2 people. Stack: LLM + Google Sheets + Email + Cron.
Why it wins: Freelancers feel this pain every month.
Build flow
01 · Problem
Chasing late payments is awkward, so freelancers delay and cash flow suffers.
02 · Solution
Read invoices from a sheet, compute days overdue and draft reminders that escalate in tone, waiting for approval before sending.
03 · Build
- 1Read invoices from a sheet
- 2Compute reminder stage
- 3Draft emails with the LLM
- 4Send after approval
04 · Demo
Show three invoices at different ages with three different reminder drafts.
MVP checklist
- Overdue detection
- Escalating tone
- Approval before send
- Payment status log
Tech stack
| Tech | Role | |
|---|---|---|
| LLM | Language model | AI |
| Google Sheets | Tooling | Tool |
| Tooling | Tool | |
| Cron | Scheduled jobs | Backend |
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