Real AI agent use cases, with sources and setup prompts

Photograph a stack of books and let Claude Code list them for sale

He took photos of 24 books and asked Claude Code, running on the DeepSeek API, to find each book's details and publish listings on Leboncoin at half the retail price.

$17/moAn hourBeginnerSource linked

Source

@Barbayar on X · 2026-10-18

Written in our own words. Credit to the original author. Link checked 2026-10-19.

What they did

He took photos of 24 books and asked Claude Code, running on the DeepSeek API, to find each book's details and publish listings on Leboncoin at half the retail price.

Result (as claimed)

All 24 listings published for a total cost of about €0.60.

Tools they used

Claude CodeDeepSeek API

Cost: Claude Code: from $17/mo.

Set it up

  1. Gather the documents

    Collect statements, bills, invoices or tax documents for the period you want reviewed.

  2. Ask for an audit, not actions

    Have Claude Code list findings, amounts and suggested next steps before it does anything.

  3. Approve each action

    Approve cancellations, disputes or payments one at a time. Never give an agent open-ended access to move money.

  4. Track the result

    Record what changed and what you saved so you can check it next month. This is not financial advice.

Copy the full setup prompt

Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.

You are helping me set up this AI use case end to end in Claude Code.

Goal: Photograph a stack of books and let Claude Code list them for sale
What the original author did: He took photos of 24 books and asked Claude Code, running on the DeepSeek API, to find each book's details and publish listings on Leboncoin at half the retail price.
Reported result (as claimed by the author): All 24 listings published for a total cost of about €0.60.
Source: https://x.com/Barbayar/status/2111938801589530696
Tools they used: Claude Code, DeepSeek API
Category: Money

Please:
1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like).
2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure.
3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data.
4. Finish with a checklist to run it again next time.

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Guides for this use case

How to vibe code an app with Claude Code · How to make money with AI agents

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