QuickBooks Invoice Chaser with OpenCode

There are two expensive mistakes here and neither is a typo. One is chasing an account that is in dispute or on a payment plan. The other is quoting a figure that does not match the ledger. OpenCode lets you choose the model making both calls, which is worth doing deliberately when the output is a letter about money going to a customer.
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Free to start · guided setup · switch agents any time.

Live demo

Watch it work before it's live

Run a staged conversation — no account needed. The agent handles it for real while a simulated world answers its tool calls; nothing touches real accounts, and nothing is actually sent.

Overdue sweep 12 August

Harbourline InteriorsQuickBooks: Harbourline Interiors Ltd

Nine invoices are past due for a total of 38,420.00 GBP. Meridian Property Group holds three of them between 12 and 19 days old for 14,900.00 GBP, Calder Fit Out has a single invoice at 6 days for 2,180.00 GBP, and the remaining five are one invoice each between 3 and 11 days old. Nobody has been emailed about any of them this week.

What you'll need

Set up in minutes

Using this template drops you into a guided setup. It asks exactly this, nothing else:

  1. Connect QuickBooks

    One sign-in. The agent acts through your account, scoped to what this template uses.

  2. Connect Gmail

    One sign-in. The agent acts through your account, scoped to what this template uses.

  3. Connect Slack

    One sign-in. The agent acts through your account, scoped to what this template uses.

  4. Dunning policy

    Your reminder ladder for overdue invoices - how many days past due before the first nudge, how the tone hardens at each step after that, the smallest balance worth chasing, how long to wait between reminders, and which accounts (payment plans, live disputes, your biggest customers) never get a templated email.

  5. Runs on OpenCode

    Preselected for this page — connect your OpenCode account during setup, or switch to NoClick's built-in models with one click.

  6. Watch it handle a test run

    A staged conversation against a simulated world — then it’s live.

A considered pairing

Why OpenCode for this agent

Skips are named, not silent

An account your policy protects is left undrafted and listed in Slack with the reason. Silence would look identical to an account nobody noticed.

Model choice on a money letter

Copying a balance exactly and matching a tone step to an age are simple asks that weaker models still get wrong. Test a model here before leaving it running.

Good to know

Before you fork

Who actually sends these, and does the harness change that?

A person, always, and no. Every harness on this template writes drafts into Gmail and none of them can send. The harness changes how well a draft reads and how reliably the figures match the ledger, not whether a human stays in the loop. Most teams have one person clear the drafts with their coffee.

Other editions

Run it with a different agent

claude-codeClaude CodeOpenAICodexopenclawhermesMore OpenCode agents

Make it yours

Put QuickBooks Invoice Chaser to work on OpenCode.

Free to start. Guided setup, a staged test run, and a workflow you can change at every step.