Somewhere in your estate is a Java service old enough to vote. REST endpoints by the dozen, one SOAP relic nobody will admit to, session auth, and the person who understood it all has retired. It works, which is why nobody touches it. And now the business wants AI agents to use it.

Every enterprise is under pressure to connect AI agents to systems that were never designed for them, yet most MCP material assumes a greenfield project or a toy demo. This session addresses the situation attendees actually face: a brownfield estate of REST and SOAP services that cannot be rewritten. It is demo-driven, built on the official MCP Java SDK, Spring AI, and Spring for GraphQL, and it is honest about the failure modes: tool sprawl from auto-generation, auth translation, oversized responses, and unsafe retries against non-idempotent writes.

Attendees leave with a reusable pattern set (facade first, curation over generation, read-only first, approval gates) they can apply to their own estate the following week.