Lunar.dev MCP Gateway (MCPX) vs Promptfoo MCP Proxy: Side-by-Side Comparison (2026)

Lunar.dev MCP Gateway (MCPX): Gateway for securing, governing, and auditing AI agent access to MCP servers. built by Lunar.dev. Core capabilities include Centralized MCP server registry with service discovery for local and remote servers, Role-based access control (RBAC) with per-agent tool restrictions and on-behalf-of attribution, Authentication to MCP servers via API keys or OAuth..

Promptfoo MCP Proxy: Proxy layer for controlling and monitoring MCP server access in AI apps. built by Promptfoo. Core capabilities include MCP server whitelisting to block unapproved servers, Granular access control per user and application, Real-time monitoring of MCP interactions..

Both serve the Agentic AI Security market but differ in approach, feature depth, and target audience.

Lunar.dev MCP Gateway (MCPX) differentiates with Centralized MCP server registry with service discovery for local and remote servers, Role-based access control (RBAC) with per-agent tool restrictions and on-behalf-of attribution, Authentication to MCP servers via API keys or OAuth. Promptfoo MCP Proxy differentiates with MCP server whitelisting to block unapproved servers, Granular access control per user and application, Real-time monitoring of MCP interactions.

Lunar.dev MCP Gateway (MCPX) is developed by Lunar.dev. Promptfoo MCP Proxy is developed by Promptfoo. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Lunar.dev MCP Gateway (MCPX) and Promptfoo MCP Proxy serve similar Agentic AI Security use cases: both are Agentic AI Security tools, both cover MCP Security, Agentic AI Security, AI Gateway. Review the feature comparison above to determine which fits your requirements.