Emailens MCP for ChatGPT

io.github.emailens/mcp

Analyze, audit, fix and diff HTML, MJML, Maizzle and React Email across 21 email clients.

client:ChatGPT transport:streamable-http runtime:npm tools:9

Install Emailens MCP in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://emailens.dev/api/mcp

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