MCP Dev Summit Seoul 2026

As MCP adoption grows, most implementations focus on defining tools and integrating APIs, but far less attention is given to how these tools are actually executed. In production environments often introduces real challenges in both security and performance.

In this session, we explore how WebAssembly fundamentally changes this model by providing a secure and high-performance execution layer. We'll also work through how MCP tools can run inside a sandboxed WebAssembly runtime, where access to the file system, network, and environment is explicitly controlled. This significantly reduces the attack surface compared to traditional server-side execution models, especially in multi-tenant and agent-driven environments.

From a performance perspective, WebAssembly enables near-native execution speed with extremely fast startup times. WebAssembly modules can start in milliseconds, making them ideal for MCP workloads where tools are invoked frequently and latency directly impacts agent responsiveness.
We will also cover authentication patterns such as OAuth and JWT, and explain how a “secret-less” architecture can be achieved by isolating credentials outside of the execution runtime.