aimock Hits 2.5M Weekly Installs as Open-Source AI Mock Server Gains Traction

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aimock, an open-source mock server for AI applications, has surpassed 2.5 million weekly installs and earned over 900 GitHub stars since its launch by the CopilotKit team. The tool allows developers to test AI-powered apps offline by replacing live LLM API calls with JSON fixtures, eliminating token costs and dependency on real endpoints during CI runs. It supports a wide range of services including OpenAI, Claude, Gemini, vector databases like Pinecone and Qdrant, and agentic protocols such as MCP and AG-UI. Recent updates introduced record-and-replay functionality, drift detection for silent provider changes, and chaos testing to simulate real-world failure scenarios. The MIT-licensed tool is already in use by projects including TanStack, Mastra, and Composio, and can be set up in three steps via npm.

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