ChatStack - App Cost Estimator for ChatGPT

app.chatstack/app-cost-estimator

Estimate development costs and hours, scope an MVP, and write a PRD with user stories and specs.

client:ChatGPT transport:streamable-http tools:5

Install ChatStack - App Cost Estimator in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mcp.chatstack.app/mcp

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