"LoopBack" matching MCP servers:

Gives AI coding agents dereferenced OpenAPI facts about the backend being implemented, and verifies that implementation against a local server via ping probes, single requests, contract tests, and ordered multi-step scenarios with extraction and assertions. It also spins up loopback mocks for missing dependencies and derives a relational data model from the spec, reconciling it with optional live database evidence and emitting additive SQL that is never executed.