Crate mcp_protocol 

Model Context Protocol (MCP) Implementation

Standards-compliant MCP implementation for PromptFleet agents

• JSON-RPC 2.0 wire format (MCP specification requirement)
• HTTP/HTTPS transport with OAuth 2.1 Bearer token support
• FastMCP compatible - interoperable with Python FastMCP and TypeScript MCP SDKs
• External MCP servers - connect to any MCP server via proxy

Compatibility Verified (June 2025)

• MCP Specification 2025-06-18 (latest)
• JSON-RPC 2.0 specification compliant
• FastMCP Python implementation compatible
• Standard OAuth 2.1 Bearer token authentication
• HTTP+SSE and Streamable HTTP transport support

Core Features

• Tool Discovery: list_tools method
• Tool Execution: call_tool method with proper parameter handling
• Memory Operations: add_memory, search_memory methods
• Health Monitoring: heartbeat and health endpoints
• Authentication: Bearer token and custom auth strategies
• Proxy Support: Connect to external MCP servers outside Kubernetes

Re-exports

pub use error::*;

pub use types::*;

pub use client::*;

pub use server::*;

pub use auth::*;

pub use proxy::*;

Modules

auth

MCP Authentication

client

MCP Client

error

MCP Protocol Errors

handler

MCP Protocol Handler

proxy

MCP Proxy

server

MCP Server

types

MCP Protocol Types

Structs

McpProtocolHandler

MCP Protocol Handler - Integrates with protocol_transport_core

Enums

QueryMode

Query Mode - How to handle tool listing

Constants

JSONRPC_VERSION

JSON-RPC Version - Required by MCP specification

MCP_PROTOCOL_VERSION

MCP Protocol Version - Current specification version

Traits

ToolProvider

Tool Provider Trait - Pure abstraction for tool operations

Functions

create_mcp_handler

Quick setup function for MCP protocol handler

create_mcp_handler_with_capabilities

Quick setup function for MCP protocol handler with custom capabilities