Phantom Secrets

Local proxy and MCP that stops AI coding agents from leaking your real API keys.

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Phantom is a free local proxy and MCP tool that stops AI coding agents from leaking real API keys, by replacing project secrets with scoped placeholder tokens that a local proxy swaps for the real value at the network boundary. It's aimed at developers who want to delegate more work to tools like Claude Code, Cursor, or Codex without ever putting real secrets in the agent's context.

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Problem & pain-point mapping
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