Casso Websites for ChatGPT

com.casso-websites/casso

Publish websites and small apps your agent writes: free hosting, accounts, data, forms.

client:ChatGPT transport:streamable-http

Install Casso Websites in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://webhook.casso-websites.com/mcp

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