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

Lunar.dev MCP Gateway (MCPX)

Security teams deploying Claude or other agentic AI systems will find real value in MCPX's per-agent tool restrictions and immutable audit logs that actually capture prompt payloads and attribution, not just API calls. The role-based access control with on-behalf-of tracking addresses the specific governance gap that makes AI agents harder to audit than traditional service accounts. This tool prioritizes Govern and Detect over Respond, which works if your security model treats agent behavior as inherently less trustworthy than human access. Skip MCPX if you're looking for a lightweight proxy; the MCP Risk Score Engine is beta and Lunar.dev's 15-person team means you're betting on a startup's ability to track an evolving threat surface faster than vendors with security divisions.

Promptfoo MCP Proxy

Security teams deploying AI agents that rely on Model Context Protocol servers need Promptfoo MCP Proxy to prevent unauthorized tool access before it happens. The whitelisting architecture blocks unapproved MCP servers entirely rather than detecting misuse after, giving you control at the integration layer where most teams have blind spots. Skip this if your org hasn't yet standardized which MCP servers agents can reach, or if you're still evaluating whether MCP is central to your agentic AI strategy; the value scales with enforcement discipline.