How to Compare Prices Across Marketplaces with OpenClaw
Use OpenClaw and ToolRouter to compare prices across marketplaces. Automate deal-finding across multiple sources.
Tool
Find the best deal on a specific product by searching multiple marketplaces and comparing prices, conditions, and seller details side by side. OpenClaw is the stronger choice when you want to run the same price comparison across multiple products or regions in a repeatable batch.
Connect ToolRouter to OpenClaw
1Install the CLI
npm install -g toolrouter-mcp2Call tools directly from OpenClaw
toolrouter-mcp call web-search search --query "AI tools"
toolrouter-mcp toolsSteps
Once connected (see setup above), use the Marketplace Search tool:
- Define the product list, condition filters, and output schema before the first batch run.
- Run `search_listings` and `listing_details` with `marketplace-search` for each product, keeping field names consistent.
- Review the batch output, filter to the best deals per product, and export the final comparison with a stable schema for future reruns.
Example Prompt
Try this with OpenClaw using the Marketplace Search tool
Use marketplace-search to compare prices for a used Nintendo Switch OLED across UK marketplaces. Search all sources, get details on the top five per source, and return results in a stable schema so I can rerun this comparison weekly.
Tips
- Lock the output schema on the first run so weekly comparisons stay diff-friendly.
- Batch multiple products into one session to reduce total search overhead.