Happo for ChatGPT

io.happo/mcp

Review Happo's visual and accessibility diffs: inspect comparisons, accept or reject, report flakes.

client:ChatGPT transport:streamable-http

Install Happo in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://happo.io/api/mcp

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