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The Blog

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

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.

KF
Kelly Fisher · February 20, 2026
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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.

KF
Kelly Fisher · January 10, 2026
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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.

KF
Kelly Fisher · December 15, 2025
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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.

KF
Kelly Fisher · December 1, 2025
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