Let us say what many enterprise architects are thinking but few vendors will admit: the ESB is dead. The enterprise service bus — that monolithic integration middleware that defined the SOA era — has been in decline for a decade. What killed it was not a single technology but a series of architectural shifts: microservices, API gateways, event-driven architectures, and now the Model Context Protocol (MCP). Each shift made the ESB less relevant. MCP may be the final blow.

STOA Platform is an open-source, AI-native API gateway built for the Model Context Protocol (MCP) era. It bridges legacy APIs and AI agents with unified governance, European sovereignty, and zero vendor lock-in — all under Apache 2.0.

We're excited to announce STOA — an API Gateway built for the AI era.

As AI agents move from demos to production, enterprises face a critical question: how do you give an LLM secure, governed access to your internal tools and data? The answer is an MCP gateway — a new category of infrastructure that sits between AI agents and the services they consume, enforcing security, observability, and policy at every interaction.