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Developer Tools

OpenTelemetry Basics on Heroku Fir

Heroku recently made the next generation platform – Fir – generally available. Fir builds on the strengths of the Cedar generation while introducing a new modern era of developer experience. Fir leverages modern cloud-native technologies to provide a seamless and performant platform.

One of the goals we set out to achieve with Fir is to modernize our platform’s observability architecture. Applications being written today are becoming increasingly more distributed and complex in nature. With this increase in complexity, the need for good observability becomes critical. With solid observability practices in place, it becomes possible to gain deep insights into the internal…

Heroku AI: Managed Inference and Agents is now Generally Available

Many of the most exciting experiences we’re beginning to rely on every day are powered by AI; whether it’s conversational assistants, personalized recommendations or code generation, these experiences are powered by inference systems and intelligent agents. Behind the scenes, developers offload complex decisions, automate tasks, and compose intelligent applications using large language models and tool execution flows. Together, these AI-powered primitives are becoming a key complement to traditional application development, enabling a new wave of developer capabilities.

At Salesforce, we are helping our customers bring their agentic strategy to life with Heroku, Agentforce , and Data Cloud . These powerful products…

How I Improved My Productivity with Cursor and the Heroku MCP Server

Generative AI has been one incredible tool to improve my productivity not only for work but for personal projects too. I use it every day, from generating stories and images for my online role playing games to solving code and engineering problems and building awesome demos. Lately I’ve leaned into Cursor as my go‑to AI coding companion. Its inline suggestions and quick edits keep me moving without context‑switching. Connecting Cursor to my apps through the Heroku MCP Server lets me perform actions like deploying or scaling, without leaving my code editor, making AI a first class citizen in the Heroku…

Introducing Heroku-Streamlit: Seamless Data Visualization

We’re excited to announce the release of Heroku-Streamlit, a template that makes deploying interactive data visualization applications on Heroku simpler than ever before. Streamlit is an open-source app framework built for machine learning and data science projects. This Streamlit App brings together Heroku’s scalable cloud platform and Streamlit’s intuitive Python-based data application framework. Whether you’re a data scientist, educator, or developer, you can now spin up a cloud-based Streamlit environment in minutes.

What is Heroku-Streamlit?

Heroku-Streamlit is a ready-to-deploy template that allows data scientists, analysts, and developers to quickly share their data insights through interactive web applications. With minimal configuration,…

Introducing the Official Heroku MCP Server

We’re excited to announce the launch of the Heroku MCP Server , designed to bridge the gap between agent-driven development and Heroku’s AI PaaS. Having defined the platform experience for apps in the cloud, Heroku extends our developer and operator experience to AI capabilities. With the Heroku MCP Server, you can now expose Heroku’s robust platform capabilities as a set of intuitive actions accessible to AI agents through Model Context Protocol (MCP) .

The Heroku MCP server enables AI-powered applications like Claude Desktop, Cursor, and Windsurf to directly interface with Heroku, unlocking new levels of automation, efficiency, and intelligence…

Heroku Fir: Dive into the New Platform Capabilities

For years, Heroku has been empowering developers to deploy and scale their applications with ease. Now, we’re thrilled to introduce the general availability of the next generation of the Heroku platform, codenamed Fir , launching later this month April 2025. Built on open source standards and cloud-native technologies, Fir accelerates your development like never before.

A change of this scale is not something that we take lightly. Replatforming decisions can represent a massive shift in user experience and operational processes for a single company; we need to consider the needs of the millions of apps for the thousands of companies running…

Jupyter Notebooks on Heroku with Persistent Storage

We’re excited to introduce Heroku-Jupyter , an open-source, production-ready solution for running Jupyter Notebooks on Heroku with persistent storage, seamless deployment, and built-in security. Whether you’re a data scientist, educator, or developer, you can now spin up a cloud-based Jupyter environment in minutes.

Why Jupyter on Heroku?

Jupyter Notebooks provide an interactive computing environment ideal for data analysis, visualization, and machine learning. However, cloud-based Jupyter deployments often face challenges like ephemeral storage and complex server configurations. Heroku-Jupyter solves these issues by providing a streamlined cloud-based experience.

Persistent Storage for reliable, up-to-date models

Reliable Data Management…

Planting New Platform Roots in Cloud Native with Fir

Cloud platforms have come a long way since Heroku first set out to empower developers. Today’s cloud native development demands even greater flexibility, openness, and scalability. A fun fact about Heroku is that we use trees to denote the generation of the platform technology stack (aka version). In the tradition of Aspen, Bamboo, and Cedar, we are introducing Fir, the latest Heroku technology stack built on open source standards and cloud native technologies.

When we launched Cedar, we introduced a new way of thinking about application development and popularized principles like stateless applications, automated builds, and other twelve-factor…

Heroku Open Sources the Twelve-Factor App Definition

Today, we are excited to announce Twelve-Factor is now an open source project. This is a special moment in the journey of Twelve-Factor over the years. Published over a decade ago by Heroku co-founder Adam Wiggins to codify the best practices for writing SaaS apps , the ideas espoused on the Twelve-Factor App website inspired many generations of software engineers and the principles we take for granted in modern application development.

Open sourcing the 12-Factor App is an important milestone to take the industry forward and codify best practices for the future. As the modern app architecture reflected in the…

Testing a React App in Chrome with Heroku CI

When building web applications, unit testing your individual components is certainly important. However, end-to-end testing provides assurance that the final user experience of your components chained together matches the expected behavior. Testing web application behavior locally in your browser can be helpful, but this approach isn’t efficient or reliable, especially as your application grows more complex.

Ideally, end-to-end tests in your browser are automated and integrated into your CI pipeline. Every time you commit a code change, your tests will run. Passing tests gives you the confidence that the application — as your end users experience it —…

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