Real AI agent use cases, with sources and setup prompts
Subscriptions people cancelled after building their own tool with an AI agent, and the savings they reported. 17 matching use cases below, each with a public source.
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Built the MVP of a project management system in two all-nighters with Claude Code; it now runs a 110+ person business and three devs own it.
Asked to review all subscriptions, Grok Bot found things the author missed, such as Revolut Premium already including ChatGPT they had been paying $20 for.
Paste a URL (or localhost) and say what to show; Claude Code, Codex or Cursor drives a real browser on your machine and hands back the demo video, using the subscription you already pay for.
A builder replaced Xero with a custom invoice tool built in Claude Code, and has Grok Bot handle the day-to-day management of it.
The author combined Linux, Hermes Agent, a ChatGPT subscription and Signal into a personal Jarvis with separate chats per job and a restricted bot the whole family can use.
Endo is a "higher-order harness": one UI that uses any agent provider with your existing subscriptions, swaps agents mid-session and composes them into workflows. The author tested it by having Fable and Astra stage a mock presidential debate.
With spare time and a Claude Max subscription, the author had Fable hack on Wine until desktop Microsoft Office ran on Linux with no virtual machine, then packaged the setup as Nix flakes.
Set out to replace his whole tech stack with vibe-coded alternatives using Claude Code, and documented where it fell short.
Refused default AI styling: picked a SaaS product she liked and had Claude in Chrome analyze it to build a design foundation first.
Paying £301 a month for GoHighLevel, Calendly, Zoom, Loom and six more, the author sorted each tool into rebuild, downgrade or keep, and now runs six of them inside one tool built with Claude Code.
A builder used their AI agents with the ToolJet MCP to build a back office for jobs, bookings, invoices and parts from one prompt in under 40 minutes.
Built a connector that uses an OpenAI subscription you already pay for to turn PDFs into spoken audiobooks.
Asked Grok Bot to find and cancel subscriptions she no longer used, such as Hulu and Apple Music.
Shipped a SaaS that scans a site and reports whether ChatGPT, Claude, Gemini, Perplexity and Grok mention and cite the brand.
Built Aclif, agent CLI framework: one grammar, canonical names across SaaS.
After a paid removal service failed, the author open-sourced remove-your-data, a repo of instructions that tells your AI agent exactly how to get your phone, addresses and vehicles off people-search sites.
Reported story: Curative cancelled a $600K a year Salesforce contract and built its own internal CRM with AI coding.
How to make faceless YouTube videos with AI · How to automate work with n8n and AI · How to vibe code an app with Claude Code · How to build AI agents for SEO and ads · How to run multiple coding agents together · How to build an MCP server for AI agents · How to add memory to coding agents · How to secure vibe-coded apps and agents · How to observe and debug AI agents · How to build agent memory and context layers · How to control coding agents from your phone · How to add payments to vibe-coded apps · How to run local LLMs with AI agents · How to set up Grok Bot agents for real work · How to build with Gemini 4 Argon and Gemini agents · How to use AI agents for taxes, bills and budgets · How to make AI video ads and Reels with agents · How to set up Hermes Agent workflows · How to vibe code a game with AI · How to use AI agents for errands, calls and shopping · How to use Cursor agents and automations · How to make 3D scenes and models with AI and Blender
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