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Finance & Accountingfree

AI Invoice Approval Mailer

by Rahul JoshiUpdated Aug 2026
RequiresSlackGoogle SheetsGoogle SheetsOpenAIGmailGmail
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ErOn Workflow ErrorOn Workflow Err…Slack – Send Error AlertSlack – Send Er…ScSchedule – Poll Milestones1Schedule – Poll…Sheets – Read Milestones1Sheets – Read M…CoFilter – Ready to Invoice1Filter – Ready …IfIF – Skip if None Ready1IF – Skip if No…CoCode – Calculate Billable Amount1Code – Calculat…GPT-4o – Write Invoice Narrative1GPT-4o – Write …CoCode – Merge GPT + Build Approval URL1Code – Merge GP…CoCode – Generate HTML Invoice1Code – Generate…Gmail – Send Invoice to Client1Gmail – Send In…Sheets – Mark Invoice as Sent1Sheets – Mark I…Sheets – Log Invoice1Sheets – Log In…Sheets – Update Approval Status1Sheets – Update…Slack – Notify Accounts Team1Slack – Notify …IfIf11
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FLOWS
STEPS · 1
Starts on a Error event

On a schedule, reads milestone data from Google Sheets, drafts invoices with OpenAI, and emails them via Gmail with Slack error alerts.

Tags

eventcomplexSlackGoogle SheetsInvoice ProcessingMultimodal AIdiscoveredpending-review
Connects
SlacksheetsGoogle SheetsOpenAIgmailGmail
CategoryFinance & Accounting
Triggerevent
Complexitycomplex
Nodes16
AddedJun 27, 2026