Capability Registry With Pluggable Loaders And Discovery

via “dynamic capability registration at runtime via mcpregistryservice”

A NestJS module to effortlessly create Model Context Protocol (MCP) servers for exposing AI tools, resources, and prompts.

Unique: Provides a service-based API for runtime capability registration that integrates with NestJS dependency injection, allowing capabilities to be registered from any service/controller with access to McpRegistryService. Maintains separate registries per McpModule instance, enabling multi-server isolation in monolithic applications.

vs others: More flexible than decorator-only approaches because capabilities can be added after module initialization; simpler than building a separate plugin loader because it reuses the same registry and execution pipeline as decorator-based tools.

[Python MCP SDK](https://github.com/modelcontextprotocol/python-sdk)

Unique: Implements a pluggable loader architecture where ArrayLoader handles manual registration and Discoverer handles attribute-based auto-discovery, with the Registry merging results into a unified namespace. This enables hybrid approaches where capabilities come from multiple sources without code duplication.

vs others: More modular than monolithic registry approaches because loaders are composable and can be extended independently, supporting both declarative (attributes) and imperative (manual) capability registration patterns.