Azure Functions Ships Serverless Agents Runtime at Build 2026
Not a pilot. Microsoft just made agents production-ready on Azure Functions—no cold start tax, no billing premium.

Why it matters
Azure Functions' serverless agents runtime removes two major friction points for enterprises building agent workflows at scale: infrastructure overhead and unexpected costs. This shifts agents from proof-of-concept territory into deployable infrastructure.
The key facts
7 to knowAzure Functions serverless agents runtime in public preview at Build 2026
Agents defined in .agent.md markdown with YAML triggers
1,400+ connectors available
Sandboxed execution model
Zero cold start overhead confirmed
No billing premium over standard Flex Consumption pricing
MCP server access integrated
Go to the source
InfoQ AI/MLinfoq.com
Publisher excerpt: Azure Functions shipped a serverless agents runtime in public preview at Build 2026. Agents are defined in .agent.md markdown files with YAML triggers, MCP server access, 1,400+ connectors, and sandboxed execution. The Functions team confirmed to InfoQ that the runtime adds no cold start overhead…