Back/Operations/Codex
IntermediateOperationsCodex

Build an AI Agent to Find Underpriced Pokémon Cards for Arbitrage

Use an AI agent with browsing capabilities to automate the tedious process of finding valuable, underpriced collectible cards on eBay, turning hours of manual search into an automated background task.

Build an AI Agent to Find Underpriced Pokémon Cards for Arbitrage

Tools Used

Codex

OpenAI's cloud-based AI software engineering agent that can execute code, run tests, and handle complex multi-file tasks autonomously.

02Step-by-Step Guide
1

Build an Intelligence Database

Task the AI agent with a goal to browse the web and gather key data, such as unique certificate numbers for high-value graded cards, to build a target list.

Prompt:
fill out the certificate number for every card that costs more than a thousand dollars.
Pro Tip: This step transforms unstructured data from images and web pages into a structured database for the agent to use.
2

Develop a Custom Search Skill

Create a custom skill or function for your agent that encapsulates the logic for searching eBay effectively. This should include how to handle different card grading systems and how to batch requests to avoid being blocked.

3

Trigger the Deal-Hunting Agent

Use a specific prompt to command the agent to use your custom skill and its database to start hunting for deals on eBay.

Prompt:
use the eBay PSA premium. Let's find some underpriced cards from our premium list.
4

Analyze and Report Findings

The agent will autonomously navigate eBay, scrape prices for cards on its target list, compare them against market data, and flag significantly underpriced listings in a report for your final review and purchasing decision.

Start shipping
better products.

Join 100,000+ product managers who use ChatPRD to write better docs, align teams faster, and build products users love.

Free to start
No credit card
SOC 2 certified
Enterprise ready