This document outlines the security best practices implemented in the Binance MCP Server to ensure safe and secure operation.

The Binance MCP Server implements comprehensive security measures following Model Context Protocol best practices and industry standards for financial API interactions.

✅ Environment Variable Protection

• API credentials are managed exclusively through environment variables
• No hardcoded credentials in source code
• Credential validation on startup
• Protection against common placeholder values

✅ Secure Configuration

# Required environment variables
export BINANCE_API_KEY="your_api_key_here"
export BINANCE_API_SECRET="your_api_secret_here"
export BINANCE_TESTNET="true"  # Recommended for development

✅ Enhanced Symbol Validation

• Alphanumeric character validation
• Length constraints (3-20 characters)
• Prevention of numeric-only symbols
• Special character sanitization

✅ Numeric Parameter Validation

• Positive number validation with bounds checking
• Prevention of extremely large values
• Type safety enforcement

✅ Order Parameter Validation

• Strict order side validation (BUY/SELL only)
• Comprehensive order type validation
• Price validation for limit orders

✅ Sanitized Error Messages

• Automatic detection and redaction of sensitive patterns
• API key pattern masking
• Secret information filtering
• Safe error propagation

✅ Structured Error Responses

{
  "success": false,
  "error": {
    "type": "validation_error",
    "message": "Invalid symbol format",
    "timestamp": 1706123456789
  }
}

✅ API Rate Limiting

• Binance API rate limits respected (1200 requests/minute)
• Built-in rate limiter with sliding window
• Graceful rate limit error handling

✅ Request Validation

• Input size limits
• Injection pattern detection
• Request structure validation

✅ Security Event Logging

• Tool invocation tracking
• Error event logging
• Security warning detection
• Request ID generation for tracing

✅ Sensitive Data Protection

• No credential logging
• Sanitized log outputs
• Secure hash generation for identification

# Enhanced symbol validation
def validate_symbol(symbol: str) -> str:
    """Validates and sanitizes trading symbols with security checks."""
    
# Positive number validation with bounds
def validate_positive_number(value: float, field_name: str, 
                           min_value: float = 0.0, 
                           max_value: Optional[float] = None) -> float:
    """Validates numeric inputs with security bounds."""

# Limit parameter validation
def validate_limit_parameter(limit: Optional[int], 
                           max_limit: int = 5000) -> Optional[int]:
    """Validates API limit parameters."""

# Automatic sensitive data redaction
def _sanitize_error_message(message: str) -> str:
    """Removes API keys, secrets, and other sensitive patterns."""
    
def _sanitize_error_details(details: Dict) -> Dict:
    """Sanitizes error detail objects."""

class SecurityConfig:
    """Centralized security configuration management."""
    
    def __init__(self):
        self.rate_limit_enabled = True
        self.max_requests_per_minute = 60
        self.enable_input_validation = True
        self.log_security_events = True

• Use testnet for all development and testing
• Never commit API credentials to version control
• Use .env files for local development (git-ignored)
• Validate all environment variables on startup
• Enable comprehensive logging for debugging

• Use production API credentials with minimal required permissions
• Enable all security features (rate limiting, input validation)
• Monitor security audit logs regularly
• Implement proper credential rotation policies
• Use secure environment variable management
• Enable network security (firewalls, VPNs)

• Restrict API key permissions to required operations only
• Use IP whitelisting when possible
• Monitor API usage patterns
• Implement proper error handling without information leakage
• Regular security audits and updates

Monitor these security events in your logs:

SECURITY_EVENT: {"event_type": "tool_invocation", ...}
SECURITY_EVENT: {"event_type": "configuration_validated", ...}
SECURITY_EVENT: {"event_type": "rate_limit_exceeded", ...}
SECURITY_EVENT: {"event_type": "validation_error", ...}

1. Repeated validation errors - Possible probing attempts
2. Rate limit violations - Potential abuse or misconfiguration
3. Large request patterns - Possible DoS attempts
4. Unusual tool usage patterns - Possible unauthorized access

1. Immediately disable the compromised API key in Binance
2. Generate new credentials with proper security
3. Review audit logs for suspicious activity
4. Update environment variables across all deployments
5. Monitor account for unauthorized transactions

1. Shut down the MCP server immediately
2. Rotate all credentials (API keys, secrets)
3. Review system logs for evidence of compromise
4. Patch and update all dependencies
5. Conduct security audit before restart

This implementation follows:

• MCP Protocol Security Guidelines
• OWASP API Security Top 10
• Financial Services Security Standards
• Python Security Best Practices

• Review and rotate API credentials
• Update dependencies and security patches
• Audit security logs for anomalies
• Review and update security configurations

• Conduct comprehensive security audit
• Review and update security documentation
• Penetration testing (if applicable)
• Security training updates

For security issues or questions:

• Create a security issue (mark as confidential)
• Email: dossehdosseh14@gmail.com
• Include: Detailed description, steps to reproduce, impact assessment

⚠️ Remember: When in doubt about security, choose the more restrictive option.