EPUBCheck by pagespool for ChatGPT
com.pagespool/epubcheck
Hosted EPUBCheck: check an EPUB file against the EPUB specification and list every error.
client:ChatGPT
transport:streamable-http
tools:1
Install EPUBCheck by pagespool in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://api.pagespool.com/mcp/epubcheck/Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs