Show HN: MCP Mocker, Free Fake MCP Server for AI Development (antmarras.github.io)

A new open-source tool called MCP Mocker has been launched, providing a free mock server designed specifically for AI development. This innovative platform allows developers to create and validate machine communication protocols with features that include deterministic and reproducible data generation, streamable HTTP in stateless mode, and extensive input schema validation. The mock server supports the latest protocol version (2025-11-25) and provides a structured data analysis interface through prompts, guiding users in retrieving and interpreting engagement metrics. The significance of MCP Mocker lies in its potential to streamline AI development workflows by minimizing token usage while ensuring human readability. Developers can easily perform tasks such as data analysis and metric aggregation through a structured user interaction flow, using templates to reference resources. By simplifying the task of simulating multi-tier user-post-comment hierarchies, MCP Mocker enhances both the speed and efficiency of AI feature implementation. As the project is still in its early stages, it invites community feedback and feature requests, paving the way for continuous improvement and adaptation to developer needs.