HubSpot CRM

stream-relay: Streaming Data in HubSpot UI Extensions Without the Connection Limit

Carter McKay’s companion to hs-uix: a resumable, pollable stream proxy for HubSpot UI Extensions, where the card can’t hold a long connection. With the real worker + CRM-card examples.

May 5, 2026

HubSpot CRM

hs-uix: The Component Layer HubSpot UI Extensions Are Missing

A practitioner look at hs-uix — Carter McKay’s open-source, production-ready component library for HubSpot UI Extensions. Built entirely on HubSpot native primitives: no custom HTML, CSS, or iframes.

April 15, 2026