🔒 feat: Add MCP server domain restrictions for remote transports (#11013)

* 🔒 feat: Add MCP server domain restrictions for remote transports

* 🔒 feat: Implement comprehensive MCP error handling and domain validation

- Added `handleMCPError` function to centralize error responses for domain restrictions and inspection failures.
- Introduced custom error classes: `MCPDomainNotAllowedError` and `MCPInspectionFailedError` for better error management.
- Updated MCP server controllers to utilize the new error handling mechanism.
- Enhanced domain validation logic in `createMCPTools` and `createMCPTool` functions to prevent operations on disallowed domains.
- Added tests for runtime domain validation scenarios to ensure correct behavior.

* chore: import order

* 🔒 feat: Enhance domain validation in MCP tools with user role-based restrictions

- Integrated `getAppConfig` to fetch allowed domains based on user roles in `createMCPTools` and `createMCPTool` functions.
- Removed the deprecated `getAllowedDomains` method from `MCPServersRegistry`.
- Updated tests to verify domain restrictions are applied correctly based on user roles.
- Ensured that domain validation logic is consistent and efficient across tool creation processes.

* 🔒 test: Refactor MCP tests to utilize configurable app settings

- Introduced a mock for `getAppConfig` to enhance test flexibility.
- Removed redundant mock definition to streamline test setup.
- Ensured tests are aligned with the latest domain validation logic.

---------

Co-authored-by: Atef Bellaaj <slalom.bellaaj@external.daimlertruck.com>
Co-authored-by: Danny Avila <danny@librechat.ai>
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Atef Bellaaj 2025-12-18 19:57:49 +01:00 committed by GitHub
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@ -184,6 +184,16 @@ actions:
- 'librechat.ai'
- 'google.com'
# MCP Server domain restrictions for remote transports (SSE, WebSocket, HTTP)
# Stdio transports (local processes) are not restricted.
# If not configured, all domains are allowed (permissive default).
# Supports wildcards: '*.example.com' matches 'api.example.com', 'staging.example.com', etc.
# mcpSettings:
# allowedDomains:
# - 'localhost'
# - '*.example.com'
# - 'trusted-mcp-provider.com'
# Example MCP Servers Object Structure
# mcpServers:
# everything: