AnyProtocol

AnyProtocol is a .NET 8 and .NET 10 contract-first messaging library. Define one interface, register it as a client or server, and carry the same contract over local (InMemory), HTTP (REST), gRPC, Kafka, RabbitMQ, ZeroMQ, or MCP server transports according to each transport's declared capabilities.

Start here

• Getting started
• Configuration
• Envelope codecs

Protocols

Choose the transport that matches the deployment boundary and delivery guarantees:

• InMemory — process-local execution and deterministic tests

• REST / HTTP — HTTP request/reply endpoints

• gRPC — native unary and server-streaming RPC

• MCP — expose selected methods as MCP tools

• Kafka — durable partitioned event streams

• RabbitMQ — durable topic routing and consumer groups

• ZeroMQ — brokerless socket-based messaging

• Transport semantics

• Performance

• Deployment

• Observability

• Security

• Metadata generation allowlist

• Transport development

• Support policy

• Architecture

• API reference

AnyProtocol validates selected protocols against contract operations during startup. Review transport semantics before production use: request/reply and streaming may be native or emulated, and delivery, durability, ordering, cancellation, and backpressure guarantees differ by transport.