Dan Barr

Senior Technical Marketing Engineer

Dan Barr is a Senior Technical Marketing Engineer and the primary architect of Stacklok's top-notch docs, tutorials, how-to guides and more that help customers and users navigate all things MCP. Prior to Stacklok, Dan was a Technical Product Marketing Manager at Hashicorp, and a Systems Administrator for Penn State University. Dan's hands-on experience as an end user positions him to craft clear technical materials for Stacklok's audience.

All Articles by Dan Barr

December 11, 2025

Introducing Virtual MCP Server: Unified gateway for multi-MCP workflows

Aggregate multiple MCP servers into single endpoint with vMCP with integrated tool filtering, multi-system workflows, and centralized authentication.

October 28, 2025

Cut token waste from AI workflows with the ToolHive MCP Optimizer

MCP Optimizer uses smart tool selection to reduce token usage by 85%. Give your context window a break by loading relevant tools only when they’re needed.

September 18, 2025

Examining the impact of npm supply chain attacks on MCP

An npm attack compromised packages downloaded 2B+ times weekly. Many MCP servers were vulnerable, but ToolHive’s containerization and network isolation provide defense.

September 17, 2025