GunSpec for ChatGPT

io.gunspec/mcp

Read-only firearm specifications: calibers, ammunition, manufacturers and attachment fitment.

client:ChatGPT transport:streamable-http

Install GunSpec in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.gunspec.io

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