---
title: "I Will build a Rust command line tool to automate files, APIs and scheduled tasks"
url: https://zinnhub.com/zinns/i-will-build-a-rust-command-line-tool-to-automate-files-apis-and-scheduled-tasks/
description: "Command line tools in Rust for the jobs that get done by hand every week: converting or validating a file, renaming and sorting in bulk, calling an API and writing the result to CSV or JSON, running on a schedule and reporting what it did. It ships as one binary, nothing to install on the machine that runs it."
published: 2026-09-29T07:48:54+00:00
modified: 2026-09-30T08:13:28+00:00
language: en-GB
---

# I Will build a Rust command line tool to automate files, APIs and scheduled tasks

For small teams and solo operators who do the same file, API or rename job by hand every week and want one command to do it instead. Rust compiles the tool into a single fast binary: nothing to install on the machine that runs it, no Python or Node version to keep in sync, and it stays quick on large files.

Starter is one tool with up to 3 commands, arguments and a help screen, CSV, JSON in and out, tests, a README, a binary for the platform you name, and the source in your repository. A command is one verb with its arguments: import and validate are two. Standard goes to 6 commands and adds a config file whose errors name the line and field that failed, plus binaries for Linux, Windows, macOS. Advanced goes to 10 commands, includes the config file and all three binaries, and adds parallel processing with a progress line for inputs too large to walk row by row, plus a release workflow that builds the binaries on every tag you push.

If the brief grows mid-order, I quote the extra before doing it: the add-on, or a new order. Not included: a graphical interface, a mobile app, game server plugins. Rust the language, not the game.

The code is yours: the full source goes to your repository, and you can change it, reuse it or hand it to another developer. After delivery, I fix anything that doesn’t work as we agreed, free of charge.

I’ve been in IT for 10+ years and build in Rust. My public work includes reqwest-rotate, an open-source Rust HTTP library on crates.io with 198 tests and CI.

Written updates each working day on a multi-day build, fast replies, no calls.

Steps for completing your project
1. Scope confirmed in writing – I read your requirements and confirm the command list, the input and output formats and the tier fit before any code. A command is one verb with its arguments.
2. Skeleton with the first command – The project skeleton, the help screen and the first command working end to end on your sample file, so you can run an early build and correct the direction while it is cheap.
3. Remaining commands, with tests – The rest of the commands, each with its tests. On a multi-day build you get a short written update every working day.
4. Binaries, config, README – The binary for your platform (all three on Standard and Advanced), the config file and parallel processing where the tier includes them, and a README with the exact line to run it on a schedule.
5. Handover in your repository – Source delivered in your repository with a written handover: how to build it, how to run the tests, how to cut a release.