Runtime intelligence system that makes MCP servers debuggable, testable, and safe to run in production.

Build Secure and Compliant AI agents and MCP Servers. YC W23

MockServer is an HTTP(S) mock server and proxy for testing that lets you mock APIs, inspect and modify live traffic, and inject failures. It supports HTTP/1.1, HTTP/2, gRPC, WebSockets, TCP and more on a single port, with additional support for HTTP/3, message brokers, and AI/LLM APIs.