Direct In Process Tool Invocation With Dependency Injection

via “direct in-process tool invocation with dependency injection”

A NestJS library for building transport-agnostic MCP tool services. Define tools once with decorators, consume them over HTTP, stdio, or directly via the registry. The documentation and examples generally focus one enterprise monorepos but can be easily a

Unique: Provides direct in-process tool access via NestJS dependency injection, allowing tools to be consumed as regular service methods without transport overhead — most MCP libraries only support network-based access, making testing and internal integration cumbersome

Enables zero-latency tool invocation and simpler testing compared to HTTP/stdio transports, and allows tools to be integrated as first-class NestJS services