MCP Cassette tool enables offline testing of AI agents by recording and replaying server sessions

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The mcp-cassette tool records live Model Context Protocol server interactions into a JSONL file. This recording can then be replayed as a standalone MCP server for offline testing. The approach eliminates dependency on live servers, credentials, and network availability during testing. The tool also includes safety checks for potential security risks in tool contracts. It supports multiple testing frameworks and integrates with CI/CD pipelines.

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