How to Research Card Values and Recent Sales with Claude
Research card values and recent sales with Claude and ToolRouter. Current prices for sports and collectible cards.
Tool
Claude investigates card values through a conversational market research session. Search for a player or card category, review the recent sale data, and ask Claude to contextualise the price movements — what is driving a price spike, how current values compare to recent averages, and whether a specific card represents good value at the current ask.
Connect ToolRouter to Claude
1Open connector settings Open Settings
2Add a custom connector with these details
Name
ToolRouterURL
https://api.toolrouter.com/mcp3Let Claude set you up Open Claude
Steps
Once connected (see setup above), use the Trading Cards tool:
- Ask: "Use trading-cards to look up top cards and recent sales for Patrick Mahomes"
- Claude returns card data with values, rarity grades, and recent sales
- Ask: "Which of these cards has the best value-to-rarity ratio right now?"
- Ask Claude to explain what is driving the current price and whether it looks like a buy or hold
Example Prompt
Try this with Claude using the Trading Cards tool
Use trading-cards to research the top cards for Luka Doncic. Show me the highest-value cards, recent sale prices, and rarity grades. Tell me which card in his range represents the best entry point right now and what market signals I should watch before buying.
Tips
- Ask Claude to compare current sale prices to recent averages to gauge whether prices are elevated or suppressed
- Ask what player or team news typically moves this type of card to understand the price risk
- Use rarity grade alongside recent sale data — a low pop count can justify premium pricing