Blog · Key Management & Security

Simplifying API Key Management

Practical security insights and product updates from the team building safer, simpler key management for modern APIs.

April 2, 2026 • 6 min read • API Stronghold Team

AI Agents Should Never Hold Real API Keys: Use Phantom Tokens

Giving your AI agent a real API key is the vulnerability, not the config. Phantom tokens let agents call real APIs without ever touching actual credentials. Here's the architecture that changes your blast radius.

ai-agents phantom-tokens api-security mcp credential-security

April 2, 2026 • 6 min read • API Stronghold Team

Phantom Tokens Failed One of Our 5 Attack Scenarios

Prompt injection, replay, scope escalation, enumeration, confused deputy. Four passed. One revealed a real gap. Here's the breakdown.

ai-agents phantom-tokens api-security security-testing credential-security

April 2, 2026 • 5 min read • API Stronghold Team

Sandboxing Your AI Agent Doesn't Fix the Credential Problem

Every sandbox tool assumes the agent already has your real API keys. That's the problem, not the solution.

ai-agents api-security phantom-tokens sandbox credential-security

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