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LMMock

Browser-configured mock server giving deterministic OpenAI, Anthropic, and Gemini API replies for testing.

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LMMock preview

LMMock is a locally run mock server that gives applications deterministic, rule-based replies for OpenAI, Anthropic, and Gemini APIs, configured through a browser UI with no SDK code changes. It's for developers who need repeatable test fixtures for LLM-integrated applications without spending real tokens or depending on non-deterministic model output.

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developer toolstesting tools

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