HubSpot Developer Blog

If you’ve been building on HubSpot for a while, the last year or two has felt like a lot of things moving at once. The legacy public app creation flow is ...

Consider what goes into building with a new MCP server. You're not just learning a new tool; you're learning a workflow with its own patterns, edge cases, and best practices. HubSpot's Dev MCP is well-designed (if I do say so myself!) and ...

If you’ve built against HubSpot’s public APIs, you’ve probably run into some versioning friction: v3 vs v4, legacy vs “next-gen” APIs, and the occasional breaking change ...

NOTE: HubSpot Projects v2025.1 will now be deprecated ...

If you’ve integrated with HubSpot’s APIs, you know the OAuth ...

We're thrilled to announce the launch of comprehensive testing utilities for the HubSpot UI Extensions SDK—a feature that developers have been requesting since we first launched the platform. Today, building reliable, well-tested UI extensions ...

Developers don’t come to HubSpot asking for a tool. They come with a customer problem to solve. In our early days, they would meet documentation that explained how an API works, but not ...

HubSpot’s new Developer Platform is a modern, modular way to build, customize, and distribute apps. It’s built for flexibility ...

We rebuilt our developer docs and migrated to Mintlify. This wasn’t just a tooling upgrade. It was a shift in how we think about developer education in an AI-native world.

Author's note (April 2026): This post was originally published ...