@sentry/core/build/cjs/integrations/mcp-server/validation.js

Base implementation for all Sentry JavaScript SDKs

Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });

const debugBuild = require('../../debug-build.js');
const debugLogger = require('../../utils/debug-logger.js');

/**
 * Message validation functions for MCP server instrumentation
 *
 * Provides JSON-RPC 2.0 message type validation and MCP server instance validation.
 */


/**
 * Validates if a message is a JSON-RPC request
 * @param message - Message to validate
 * @returns True if message is a JSON-RPC request
 */
function isJsonRpcRequest(message) {
  return (
    typeof message === 'object' &&
    message !== null &&
    'jsonrpc' in message &&
    (message ).jsonrpc === '2.0' &&
    'method' in message &&
    'id' in message
  );
}

/**
 * Validates if a message is a JSON-RPC notification
 * @param message - Message to validate
 * @returns True if message is a JSON-RPC notification
 */
function isJsonRpcNotification(message) {
  return (
    typeof message === 'object' &&
    message !== null &&
    'jsonrpc' in message &&
    (message ).jsonrpc === '2.0' &&
    'method' in message &&
    !('id' in message)
  );
}

/**
 * Validates if a message is a JSON-RPC response
 * @param message - Message to validate
 * @returns True if message is a JSON-RPC response
 */
function isJsonRpcResponse(message) {
  return (
    typeof message === 'object' &&
    message !== null &&
    'jsonrpc' in message &&
    (message ).jsonrpc === '2.0' &&
    'id' in message &&
    ('result' in message || 'error' in message)
  );
}

/**
 * Validates MCP server instance with type checking.
 * Accepts both the legacy API (`tool`, `resource`, `prompt`) used in SDK 1.x
 * and the newer API (`registerTool`, `registerResource`, `registerPrompt`) introduced
 * alongside the legacy API in SDK 1.x and made the only option in SDK 2.x.
 * @param instance - Object to validate as MCP server instance
 * @returns True if instance has required MCP server methods
 */
function validateMcpServerInstance(instance) {
  if (
    typeof instance === 'object' &&
    instance !== null &&
    'connect' in instance &&
    (('tool' in instance && 'resource' in instance && 'prompt' in instance) ||
      ('registerTool' in instance && 'registerResource' in instance && 'registerPrompt' in instance))
  ) {
    return true;
  }
  debugBuild.DEBUG_BUILD && debugLogger.debug.warn('Did not patch MCP server. Interface is incompatible.');
  return false;
}

/**
 * Check if the item is a valid content item
 * @param item - The item to check
 * @returns True if the item is a valid content item, false otherwise
 */
function isValidContentItem(item) {
  return item != null && typeof item === 'object';
}

exports.isJsonRpcNotification = isJsonRpcNotification;
exports.isJsonRpcRequest = isJsonRpcRequest;
exports.isJsonRpcResponse = isJsonRpcResponse;
exports.isValidContentItem = isValidContentItem;
exports.validateMcpServerInstance = validateMcpServerInstance;
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