McpBuilder class

Builder that generates MCP server code from @Server and @Tool annotations.

This builder processes Dart files containing MCP annotations and generates:

• .mcp.dart files containing the complete MCP server implementation
• .mcp.json files containing tool metadata (if generateJson is true)
• .openapi.json files containing OpenAPI 3.0 REST specifications (if generateRest is true)
• .openapi.dart files containing REST API server implementations (if generateRest is true)
• .cli.dart files containing CLI command-line applications (if generateCli is true)

The builder supports two transport modes:

• stdio: JSON-RPC over standard input/output (default)
• http: HTTP server using the shelf package

For HTTP transport, the builder extracts port and address configuration from the @Server annotation to customize the server binding.

Example generated files:

• my_server.mcp.dart - Complete MCP server with tool handlers
• my_server.mcp.json - Tool metadata with JSON schemas

Constructors

McpBuilder()

Properties

buildExtensions → Map<String, List<String>>

Mapping from input file extension to output file extensions.

final

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

build(BuildStep buildStep) → Future<void>

Generates the outputs for a given BuildStep.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited