Sendblue for ChatGPT

io.github.sendblue-api/sendblue

Send messages, read replies, and check delivery and messaging health in your Sendblue workspace.

client:ChatGPT transport:streamable-http

Install Sendblue in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://api.sendblue.co/mcp

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