Using CLI tools to automate your startup’s financial workflows

In the early stages of a company, financial workflows often emerge from routines, not thoughtful design. For instance, your monthly reports likely require the same steps each time they’re prepared: You download transaction data, reconcile expenses, update spreadsheets, and generate reports, as needed. And then these exports need to be renamed and stored, and the data needs to be cleaned before use. Each of these tasks might feel manageable on its own, and in many cases, it is. 

But as your business activity increases, those small tasks may begin to pile up. The work isn’t necessarily complex, but it is repetitive human work — and this creates risk. Manual processes can introduce inconsistencies, version issues, and small errors that are difficult to track down later.

At some point, adding more tools doesn’t solve the problem; what’s needed is a better way to organize the work. A command line interface (CLI) is one of the simplest ways to do that. It lets you turn the financial tasks you already perform into repeatable, reliable workflows.

CLI provides a direct way to interact with your system using text-based commands. Instead of navigating through multiple tools and interfaces, you define a sequence of steps and execute them exactly as written.

If you’ve been curious about automating repetitive tasks with simple CLI commands or learning more about commands, arguments, and flags for CLI, you’ve probably already seen how CLI simplifies repetitive work and how its structure makes it predictable. Now, it’s worth considering how it could improve your financial workflows. 

Here’s one way it can help: CLI works particularly well with data. It’s fast and designed to handle structured inputs and outputs. That makes it a natural fit for financial workflows, where much of the work involves moving, cleaning, and transforming data across systems.

Financial workflows tend to accumulate manual steps over time. Even when systems are in place, there are often still gaps that require human intervention. Using CLI helps close those gaps by turning individual actions into defined processes.

When you automate a workflow through CLI, you’ll likely see these improvements:

• Repetitive steps can be executed more consistently.
• Data can be handled the same way every time.
• Manual edits introduce fewer errors.
• Tasks can be run on demand or scheduled.

More importantly, using CLI will likely begin to shift how you think about your company’s financial workflows and how much time you and your team spend on these tasks. Instead of manually completing tasks one by one every time, you can invest time in designing workflows that can be reused and automated.

The most effective place to start is with workflows that are already structured, but still handled manually. These are tasks that follow a predictable pattern, even if they don’t feel repetitive in the moment.

Pulling transaction data

Pulling transaction data is one of the clearest examples of a task that could be automated, since the steps tend to happen the same way each time. For instance, founders often download CSV files from their banking or payment platforms, then move and rename them before using the data. 

Categorizing expenses

Expense categorization is another recurring task. Transactions get reviewed, labeled, and prepared for accounting. Although some tools offer built-in categorization, edge cases or custom rules often require manual adjustments.

Reporting 

Reporting workflows also tend to follow similar patterns. Data often gets gathered from multiple sources, cleaned, and combined into a summary that can be shared internally or externally. Reconciliation, exports to accounting tools, and basic cash flow monitoring aren’t one-off tasks. They’re processes that repeat, often with the same inputs and outputs.

The workflows mentioned probably already exist in your day-to-day operations. When you use CLI, how you’ll execute those tasks will change. Instead of manually repeating the same steps each time, you’ll define them as processes that can be run on demand.

The examples below show how common financial tasks can be translated into simple, repeatable workflows using CLI. The goal is to reduce manual steps and create consistency where it matters.

1. Pulling transaction data

Instead of manually logging into a platform, exporting a file, and organizing it afterward, a CLI workflow can request that data directly from an API and store it in a defined location. From there, the output can be passed into another command or script for further processing. What was previously a multi-step manual task can turn into a single, repeatable action that can be run whenever needed.

2. Expense categorization

The process of categorizing transactions benefits from consistency. A simple CLI-based workflow can apply rules based on transaction descriptions, amounts, or vendors.

These rules can automatically tag transactions and produce a clean dataset that can be passed to accounting systems or reporting tools. Although this approach may not replace more advanced categorization systems, it can significantly reduce the amount of manual review that’s required.

3. Monthly reporting

Reporting workflows often involve several steps every go-round, including collecting data, cleaning it, aggregating it, and formatting it for review. With CLI, these steps can be chained together into a defined sequence.

How it works: One command retrieves the data, another filters or transforms it, and a final step outputs a clean summary.This sequence can be saved as a script and reused each month, which can help your team produce consistent results, without having to rebuild the report from scratch every time.

CLI can act as a layer that connects and extends your financial tools. For example, most modern financial platforms provide APIs or structured exports. CLI works well with both. You can set it up to pull data from an API, process it, and pass it into another system or file format. In other words, you could use a CLI to not only collect data, but also manage how that data flows.

This makes CLI particularly useful when working across:

• Banking platforms
• Accounting tools
• Spreadsheets and CSV workflows
• Internal reporting systems

Modern platforms are designed to be flexible and integrated, so you can bring payments, invoicing, and spend management into a single, centralized system. CLI provides the mechanism for building lightweight automation on top, without introducing another layer of software.

Not every financial task needs to be automated. When deciding what to automate,  focus on repetitive workflows. In these cases, automation can help create value right away by trimming unnecessary repetition.

Follow this simple checklist to help identify where to start. If these criteria apply, the task or workflow could be a good candidate to automate.

• You frequently perform this task manually. 
• The steps are consistent.
• The process is prone to small, human errors.
• The output follows a predictable format.

Starting with one well-defined process is often more effective than attempting to automate everything at once.

CLI can be highly valuable in the right context, but it might not be the right solution for every situation. There’s a learning curve, particularly for those who are new to working with CLI. Even though the concepts are straightforward, the initial experience can feel unfamiliar.

Remember, CLI is best suited for repeatable tasks. For example, one-off workflows or highly variable processes may not benefit from automation in the same way.

To set realistic expectations for what you can do with this interface, it’s important to recognize that CLI is meant to complement your existing tools, rather than replace them. Financial platforms, accounting systems, and reporting tools still provide essential functionality. CLI simply extends what they can do.

The most effective way to begin is to start small and stay focused. Choose a single workflow that you already perform regularly. That could be downloading transaction data, organizing files, or preparing a simple report.

Once you’ve identified a repetitive task or action to start with, here’s what to do next:

• Identify the steps involved.
• Look for CLI commands that replicate those steps.
• Combine them into a simple script.
• Test and refine the process.

There’s no need to build a complex system early on. Focus on small improvements as you test how automation might work for each task, and iterate from there.

Automating financial workflows with CLI shouldn’t add complexity to your day-to-day work. Instead, it should reduce friction and bring structure to work that already exists.

Turning repetitive tasks into repeatable processes can help founders create systems that are more reliable, more scalable, and easier to maintain. Over time, these systems can reduce the amount of manual effort required to keep financial operations running smoothly. And, as your workflows become more structured, tools like Mercury, can help bring your financial data and operations into one place, making it easier to build and extend these systems over time.