Click Below to Get the Code

Browse, clone, and build from real-world templates powered by Harper.
Repo
GitHub Logo

Getting Started Pub/Sub

A complete real-time messaging starter project featuring a Harper application with MQTT, WebSocket, and Server-Sent Events (SSE) capabilities, plus client examples in multiple languages.
Shell
Repo
Shell

Getting Started Pub/Sub

By
Ivan R. Judson, Ph.D.
December 12, 2025
By
Ivan R. Judson, Ph.D.
December 12, 2025
By
Ivan R. Judson, Ph.D.
December 12, 2025
December 12, 2025
A complete real-time messaging starter project featuring a Harper application with MQTT, WebSocket, and Server-Sent Events (SSE) capabilities, plus client examples in multiple languages.
Ivan R. Judson, Ph.D.
Distinguished Solution Architect
A complete real-time messaging starter project featuring a Harper application with MQTT, WebSocket, and Server-Sent Events (SSE) capabilities, plus client examples in multiple languages.

Download

White arrow pointing right
A complete real-time messaging starter project featuring a Harper application with MQTT, WebSocket, and Server-Sent Events (SSE) capabilities, plus client examples in multiple languages.

Download

White arrow pointing right
A complete real-time messaging starter project featuring a Harper application with MQTT, WebSocket, and Server-Sent Events (SSE) capabilities, plus client examples in multiple languages.

Download

White arrow pointing right

Explore Recent Resources

Podcast
GitHub Logo

Inside PixiJS, AT Protocol, and Modern Game Development with Trezy Who

Trezy shares his journey from professional drummer and filmmaker to software engineer and open source maintainer. Learn about PixieJS, game development, AT Proto, BlueSky, data sovereignty, and how developers can confidently contribute to open source projects.
Select*
Podcast
Trezy shares his journey from professional drummer and filmmaker to software engineer and open source maintainer. Learn about PixieJS, game development, AT Proto, BlueSky, data sovereignty, and how developers can confidently contribute to open source projects.
Person with short hair wearing a light blue patterned shirt, smiling widely outdoors with blurred greenery and trees in the background.
Austin Akers
Head of Developer Relations
Podcast

Inside PixiJS, AT Protocol, and Modern Game Development with Trezy Who

Trezy shares his journey from professional drummer and filmmaker to software engineer and open source maintainer. Learn about PixieJS, game development, AT Proto, BlueSky, data sovereignty, and how developers can confidently contribute to open source projects.
Austin Akers
Mar 2026
Podcast

Inside PixiJS, AT Protocol, and Modern Game Development with Trezy Who

Trezy shares his journey from professional drummer and filmmaker to software engineer and open source maintainer. Learn about PixieJS, game development, AT Proto, BlueSky, data sovereignty, and how developers can confidently contribute to open source projects.
Austin Akers
Podcast

Inside PixiJS, AT Protocol, and Modern Game Development with Trezy Who

Trezy shares his journey from professional drummer and filmmaker to software engineer and open source maintainer. Learn about PixieJS, game development, AT Proto, BlueSky, data sovereignty, and how developers can confidently contribute to open source projects.
Austin Akers
Case Study
GitHub Logo

How a $1B+ Retailer Unlocked $92M in Annual Revenue, Without Touching the Origin.

When experimentation logic, redirect limits, and origin failures were quietly costing a $1B+ retailer tens of millions, Harper delivered edge-deployed acceleration without re-platforming. 47x ROI. Six weeks to prove it.
Case Study
When experimentation logic, redirect limits, and origin failures were quietly costing a $1B+ retailer tens of millions, Harper delivered edge-deployed acceleration without re-platforming. 47x ROI. Six weeks to prove it.
Person with short dark hair and moustache, wearing a colorful plaid shirt, smiling outdoors in a forested mountain landscape.
Aleks Haugom
Senior Manager of GTM & Marketing
Case Study

How a $1B+ Retailer Unlocked $92M in Annual Revenue, Without Touching the Origin.

When experimentation logic, redirect limits, and origin failures were quietly costing a $1B+ retailer tens of millions, Harper delivered edge-deployed acceleration without re-platforming. 47x ROI. Six weeks to prove it.
Aleks Haugom
Mar 2026
Case Study

How a $1B+ Retailer Unlocked $92M in Annual Revenue, Without Touching the Origin.

When experimentation logic, redirect limits, and origin failures were quietly costing a $1B+ retailer tens of millions, Harper delivered edge-deployed acceleration without re-platforming. 47x ROI. Six weeks to prove it.
Aleks Haugom
Case Study

How a $1B+ Retailer Unlocked $92M in Annual Revenue, Without Touching the Origin.

When experimentation logic, redirect limits, and origin failures were quietly costing a $1B+ retailer tens of millions, Harper delivered edge-deployed acceleration without re-platforming. 47x ROI. Six weeks to prove it.
Aleks Haugom
Blog
GitHub Logo

The Security Problem in Agentic Engineering has an Architectural Solution

Agentic AI promises autonomous software development, but enterprise security concerns block adoption. This article explains how credential sprawl creates risk—and how a unified runtime architecture like Harper eliminates infrastructure access requirements, enabling secure agentic engineering in production environments.
A.I.
Blog
Agentic AI promises autonomous software development, but enterprise security concerns block adoption. This article explains how credential sprawl creates risk—and how a unified runtime architecture like Harper eliminates infrastructure access requirements, enabling secure agentic engineering in production environments.
Person with very short blonde hair wearing a light gray button‑up shirt, standing with arms crossed and smiling outdoors with foliage behind.
Kris Zyp
SVP of Engineering
Blog

The Security Problem in Agentic Engineering has an Architectural Solution

Agentic AI promises autonomous software development, but enterprise security concerns block adoption. This article explains how credential sprawl creates risk—and how a unified runtime architecture like Harper eliminates infrastructure access requirements, enabling secure agentic engineering in production environments.
Kris Zyp
Mar 2026
Blog

The Security Problem in Agentic Engineering has an Architectural Solution

Agentic AI promises autonomous software development, but enterprise security concerns block adoption. This article explains how credential sprawl creates risk—and how a unified runtime architecture like Harper eliminates infrastructure access requirements, enabling secure agentic engineering in production environments.
Kris Zyp
Blog

The Security Problem in Agentic Engineering has an Architectural Solution

Agentic AI promises autonomous software development, but enterprise security concerns block adoption. This article explains how credential sprawl creates risk—and how a unified runtime architecture like Harper eliminates infrastructure access requirements, enabling secure agentic engineering in production environments.
Kris Zyp