The Blog

Deep dives on API security, AI safety, ephemeral cryptography, and the architecture decisions behind HardenLabs.

api-security credential-management insider-risk

Your API Keys Outlive Your Employees

A solutions architect's firsthand account of how static API credentials accumulate across teams, survive employee departures, and create invisible security gaps that no one monitors.

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Kelly Fisher ·
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ai-security mcp tool-poisoning tds

Tool Poisoning Is the Next Credential Leak: 5 Attack Vectors MCP Doesn't Protect Against

MCP tool definitions are instructions that agents follow literally. A compromised server doesn't need an exploit. It just changes a description. Here are the five ways it happens and what you can do about it.

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Kelly Fisher ·
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ai-security mcp tool-poisoning

Securing MCP Tool Calls: Why AI Agents Need Authentication

As AI agents gain the ability to call external tools via MCP, the attack surface expands dramatically. Tool-poisoning, unsigned tool definitions, and prompt injection create new security challenges.

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Kelly Fisher ·
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architecture privacy api-security

Out-of-Path: The Case for Security That Stays Out of the Way

Most security products sit in your request path and see everything. We built HardenAPI to be out-of-path by design. Here's why that matters and how it works.

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Kelly Fisher ·
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api-security authentication ephemeral-keys

Why Static Credentials Are a Liability

API keys, client secrets, hardcoded tokens. Static credentials don't expire, can't be scoped, and get leaked constantly. Here's why ephemeral key rotation is the future of service-to-service authentication.

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Kelly Fisher ·
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company founding

Why I Started HardenLabs

The founding story of HardenLabs: why I started a company, what I kept seeing go wrong, and what I'm trying to build differently.

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Kelly Fisher ·
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