Module prelude 

Prelude for convenient imports

Structs

Context

Protocol-agnostic request context.

ErrorResponse

A generic error response that can be serialized and sent over the wire.

OpenApiBuilder

Builder for composing OpenAPI specs from multiple sources.

WsSender

WebSocket sender for server-push messaging.

Enums

ErrorCode

Protocol-agnostic error code that maps to HTTP status, gRPC code, CLI exit code, etc.

Traits

CliSubcommand

Trait for types that can be mounted as CLI subcommand groups.

Deserialize

A data structure that can be deserialized from any data format supported by Serde.

HttpMount

Trait for types that can be mounted as HTTP route groups.

IntoErrorCode

Trait for converting errors to protocol-agnostic error codes.

JsonRpcMount

Trait for types that can be mounted as JSON-RPC method namespaces.

McpNamespace

Trait for types that can be mounted as MCP tool namespaces.

Serialize

A data structure that can be serialized into any data format supported by Serde.

WsMount

Trait for types that can be mounted as WebSocket method namespaces.

Attribute Macros

asyncapi

Generate AsyncAPI specification for event-driven services.

capnp

Generate Cap’n Proto schema from an impl block.

cli

Generate a CLI application from an impl block.

connect

Generate Connect protocol schema from an impl block.

graphql

Generate GraphQL schema from an impl block using async-graphql.

graphql_enum

Define a GraphQL enum type.

graphql_input

Define a GraphQL input type.

grpc

Generate Protocol Buffers schema from an impl block.

http

Generate HTTP handlers from an impl block.

jsonrpc

Generate JSON-RPC 2.0 handlers over HTTP.

jsonschema

Generate JSON Schema from an impl block.

markdown

Generate Markdown API documentation from an impl block.

mcp

Generate MCP (Model Context Protocol) tools from an impl block.

openapi

Generate OpenAPI specification without HTTP routing.

openrpc

Generate OpenRPC specification for JSON-RPC services.

program

Blessed preset: CLI application with Markdown docs.

response

Helper attribute for method-level HTTP response customization.

route

Helper attribute for method-level HTTP route customization.

rpc

Blessed preset: JSON-RPC server with OpenRPC spec and serve.

serve

Coordinate multiple protocol handlers into a single server.

server

Blessed preset: HTTP server with OpenAPI and serve.

smithy

Generate Smithy IDL schema from an impl block.

thrift

Generate Apache Thrift schema from an impl block.

tool

Blessed preset: MCP tools with JSON Schema.

ws

Generate WebSocket JSON-RPC handlers from an impl block.

Derive Macros

Deserialize

Serialize

ServerlessError

Derive macro for error types that implement IntoErrorCode.