MCP Time Server

A Model Context Protocol (MCP) server providing time and timezone tools. Built with Go and the official MCP Go SDK, supporting both SSE and Streamable transports.

Features

🕐 Time Operations

• Current Time: Get current time in any timezone with flexible formatting
• Time Formatting: Convert timestamps between different formats (RFC3339, Unix, custom layouts)
• Time Parsing: Parse time strings with auto-detection or explicit formats
• Timezone Info: Comprehensive timezone information including DST transitions

🌐 Protocol Support

• SSE Transport: Real-time Server-Sent Events for persistent connections
• Streamable Transport: HTTP request/response for stateless operations
• MCP Compliant: Full compatibility with MCP protocol v0.8.0

📊 Observability

• Prometheus Metrics: Detailed metrics for requests, operations, and errors
• Structured Logging: JSON and console logging with configurable levels
• Health Checks: Kubernetes-ready health endpoints

🏗️ Production Ready

• Multi-Architecture: ARM64 and AMD64 Docker images
• Graceful Shutdown: Proper signal handling and connection draining
• Configuration: YAML config with environment variable overrides
• Security: Non-root container execution

Quick Start

Using Docker

# Run with default configuration
docker run -p 8080:8080 -p 9080:9080 ghcr.io/hspedro/mcp-server-time:latest

# Run with custom configuration
docker run -p 8080:8080 -v $(pwd)/config.yaml:/app/config.yaml ghcr.io/hspedro/mcp-server-time:latest

Using Go

# Clone and build
git clone https://github.com/hspedro/mcp-server-time.git
cd mcp-server-time
make build

# Run locally
./mcp-server-time

MCP Tools

get_time

Get current time with optional timezone and format specification.

Input:

{
  "timezone": "America/New_York",  // Optional, defaults to UTC
  "format": "RFC3339"              // Optional, defaults to RFC3339
}

Output:

{
  "current_time": "2023-12-25T10:30:45-05:00",
  "timezone": "America/New_York",
  "format": "RFC3339",
  "timestamp_utc": "2023-12-25T15:30:45Z",
  "unix_timestamp": 1703520645
}

format_time

Format a timestamp using custom formats with optional timezone conversion.

Input:

{
  "timestamp": "2023-12-25T15:30:45Z",  // Required: string or number
  "format": "Unix",                    // Required: output format
  "timezone": "America/New_York"       // Optional: target timezone
}

parse_time

Parse time strings with auto-detection or explicit format specification.

Input:

{
  "time_string": "December 25, 2023 3:30 PM",  // Required
  "format": "",                                // Optional: auto-detect if empty
  "timezone": "America/New_York"               // Optional: assume timezone
}

timezone_info

Get comprehensive timezone information including DST transitions.

Input:

{
  "timezone": "America/New_York",              // Required
  "reference_time": "2023-12-25T15:30:45Z"    // Optional: defaults to now
}

Configuration

YAML Configuration

server:
  name: "mcp-server-time"
  version: "1.0.0"
  host: "localhost"
  port: 8080
  graceful_shutdown_timeout: 30s

time:
  default_timezone: "UTC"
  default_format: "RFC3339"
  supported_formats:
    - "RFC3339"
    - "RFC3339Nano"
    - "Unix"
    - "UnixMilli"
    - "UnixMicro"
    - "UnixNano"
    - "Layout"

logging:
  level: "info"        # debug, info, warn, error, fatal
  format: "json"       # json, console

metrics:
  enabled: true
  port: 9080
  path: "/metrics"

Environment Variables

# Server configuration
MCP_SERVER_HOST=0.0.0.0
MCP_SERVER_PORT=8080

# Time service configuration
MCP_TIME_DEFAULT_TIMEZONE=America/New_York
MCP_TIME_DEFAULT_FORMAT=RFC3339

# Logging configuration
MCP_LOGGING_LEVEL=debug
MCP_LOGGING_FORMAT=console

# Metrics configuration
MCP_METRICS_ENABLED=true
MCP_METRICS_PORT=9080

Endpoints

MCP Transports

• SSE: GET /sse - Server-Sent Events transport
• Streamable: POST /streamable - HTTP request/response transport
• MCP: POST /mcp - Alias for streamable transport

Monitoring

• Health: GET /health - Health check endpoint
• Metrics: GET /metrics - Prometheus metrics (if enabled)

Development

Prerequisites

• Go 1.23+
• Docker (optional)
• Make

Development Commands

# Format code
make fmt

# Run linters
make lint

# Run tests
make test

# Generate mocks
make mocks

# Build binary
make build

# Run locally
make run

# Complete verification
make verify

MCP Client Integration

Cursor IDE

Add to your MCP configuration:

{
  "mcpServers": {
    "time": {
      "type": "url",
      "url": "http://localhost:8080/streamable",
      "transport": "streamable"
    }
  }
}

License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.