LuckyPennySoftware/MediatR

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

11862 stars · 2181 forks observed · 2026-10-21

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

MediatR is a simple, dependency-free mediator implementation for .NET that supports in-process messaging with request/response, commands, queries, notifications, and events. It integrates with Microsoft.Extensions.DependencyInjection and supports pipeline behaviors, pre/post processors, and stream requests.

Use cases

• decouple controllers from business logic in ASP.NET Core apps
• implement CQRS-style command and query separation
• publish in-process notifications and events to multiple handlers
• add cross-cutting pipeline behaviors like validation and logging
• share request contracts across assemblies for API or gRPC projects

When to choose

• building .NET applications that want a lightweight mediator pattern without external dependencies
• you need CQRS-style separation of commands, queries, and notifications
• you want pipeline behaviors for cross-cutting concerns
• you need DI integration with Microsoft.Extensions.DependencyInjection

When to avoid

• you need distributed or cross-process messaging (use a message broker instead)
• your team prefers explicit direct dependencies between components
• you want a full-featured enterprise service bus

Facets

library · maturity stable

middleware message-queue web-framework backend developer-tools dotnet cross-platform mediator-pattern in-process-messaging cqrs request-response notifications pipeline-behaviors dependency-injection dotnet

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