How to Stop Leaking API Keys and PII to LLMs: Zero-Trust In-Memory Sanitization for Cursor & Claude

Description and use

<p>If you are using AI coding assistants like <strong>Cursor, Windsurf, Claude Desktop, or ChatGPT</strong>, you have probably pasted a snippet containing sensitive data at least once:</p> <ul> <li>Hardcoded AWS or OpenAI API keys</li> <li>Database connection strings (<code>postgres://user:password@host/db</code>)</li> <li>JWT tokens and private RSA keys</li> <li>Real customer emails, IP addresses, or internal employee IDs</li> </ul> <p>Traditional Data Loss Prevention (DLP) relies on remote cloud proxies that intercept your traffic, inspect it on a third-party server, and add <strong>200ms–50

Problem

<p>If you are using AI coding assistants like <strong>Cursor, Windsurf, Claude Desktop, or ChatGPT</strong>, you have probably pasted a snippet containing sensitive data at least once:</p> <ul> <li>Hardcoded AWS or OpenAI API keys</li> <li>Database connection strings (<code>postgres://user:password@host/db</code>)</li> <li>JWT tokens and private RSA keys</li> <li>Real customer emails, IP addresses, or internal employee IDs</li> </ul> <p>Traditional Data Loss Prevention (DLP) relies on remote cloud proxies that intercept your traffic, inspect it on a third-party server, and add <strong>200ms–50

Outcome

<p>If you are using AI coding assistants like <strong>Cursor, Windsurf, Claude Desktop, or ChatGPT</strong>, you have probably pasted a snippet containing sensitive data at least once:</p> <ul> <li>Hardcoded AWS or OpenAI API keys</li> <li>Database connection strings (<code>postgres://user:password@host/db</code>)</li> <li>JWT tokens and private RSA keys</li> <li>Real customer emails, IP addresses, or internal employee IDs</li> </ul> <p>Traditional Data Loss Prevention (DLP) relies on remote cloud proxies that intercept your traffic, inspect it on a third-party server, and add <strong>200ms–50

Evidence

How to Stop Leaking API Keys and PII to LLMs: Zero-Trust In-Memory Sanitization for Cursor & Claude

Source