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+## Description
+
+Fixes #5438
+
+This PR adds the Google Researcher MCP Server to the Roo Code marketplace as requested by @zoharbabin. The implementation includes a comprehensive configuration with multiple installation methods and proper API parameter setup.
+
+## Changes Made
+
+- **Added Google Researcher MCP Server configuration** to marketplace data (`src/services/marketplace/data/mcps.yaml`)
+- **Implemented local fallback functionality** in `RemoteConfigLoader` to support local marketplace data when remote API is unavailable
+- **Created comprehensive parameter definitions** for Google APIs:
+    - Google Search API Key (required for search functionality)
+    - Custom Search Engine ID (required for search configuration)
+    - Gemini API Key (optional for enhanced AI capabilities)
+- **Added multiple installation methods**:
+    - STDIO installation via npm package
+    - Local installation with custom configuration
+    - HTTP+SSE installation for server-based deployment
+- **Created integration tests** to verify end-to-end functionality
+
+## Technical Implementation
+
+### Local Fallback Architecture
+
+- Remote API remains the primary data source (maintains existing functionality)
+- Local YAML files serve as fallback when remote API is unavailable
+- Hybrid approach ensures development flexibility and production reliability
+
+### Google Researcher MCP Server Configuration
+
+- **Package**: `google-researcher-mcp@latest` from npm
+- **Repository**: https://github.com/zoharbabin/google-research-mcp
+- **Author**: Zohar Babin
+- **Capabilities**: Google Search-enhanced research for AI agents
+
+## Testing
+
+- [x] All existing core functionality tests pass
+- [x] New integration tests pass (2/2):
+    - Google Researcher MCP Server loading from local data
+    - Parameter configuration and installation methods validation
+- [x] Manual testing completed:
+    - Marketplace can load Google Researcher MCP Server
+    - All installation methods properly configured
+    - API parameters correctly defined
+
+## Verification of Acceptance Criteria
+
+- [x] **Google Researcher MCP Server available in marketplace**
+- [x] **Proper configuration with required Google API parameters**
+- [x] **Multiple installation methods supported (STDIO, Local, HTTP+SSE)**
+- [x] **Integration with existing marketplace system**
+- [x] **Maintains backward compatibility with remote API**
+
+## Files Changed
+
+- `src/services/marketplace/data/mcps.yaml` - New local marketplace data file
+- `src/services/marketplace/RemoteConfigLoader.ts` - Added `loadLocalMcps()` method and local fallback logic
+- `src/services/marketplace/__tests__/google-researcher-integration.spec.ts` - New integration tests
+
+## Checklist
+
+- [x] Code follows project style guidelines
+- [x] Self-review completed
+- [x] Comments added for complex logic
+- [x] No breaking changes introduced
+- [x] Integration tests verify functionality
+- [x] Local fallback mechanism preserves existing remote API behavior
+
+## Notes
+
+This implementation addresses the specific request in issue #5438 to add the Google Researcher MCP Server to the marketplace. The local fallback mechanism ensures the marketplace system is more robust and developer-friendly while maintaining full compatibility with the existing remote API architecture.