CompSniper for ChatGPT

com.compsniper/compsniper

eBay, Poshmark US and Mercari US listings, sold-price summaries, comparisons and research exports.

client:ChatGPT transport:streamable-http

Install CompSniper in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.compsniper.com/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs