API Stronghold
Instead of handing your AI agents and scripts your real API keys (which is dangerous if they get compromised), API Stronghold gives them temporary, limited-use tokens that expire in minutes and can't be traced back to your actual credentials.
🔗 Visit API Stronghold
Description
If a script, CI pipeline or AI agent has your real API key and gets compromised, whoever stole it now has full access to whatever that key controls, for as long as the key is valid — often indefinitely. API Stronghold's approach is to never hand out the real key at all: it sits in a vault, and every consumer instead gets a short-lived, scoped "phantom" token that expires in minutes and only allows specific actions.
API Stronghold uses zero-knowledge encryption to store real credentials in a vault and injects them only at the API boundary, so even a fully compromised agent or CI job never has the actual key — just a token that expires on a minute-level timescale. It includes a CLI for managing environment variables, one-click sync to platforms like Vercel, GitHub and AWS, granular scoped permissions, and automated key rotation measured in seconds rather than hours. There's a free tier with no credit card required; paid tiers exist but pricing isn't detailed publicly.
💬 Our review
The short version: if you're deploying AI agents or CI pipelines that touch real API keys and worry about what happens if one gets leaked, API Stronghold's short-lived-token model directly addresses that risk, and the free tier is a real starting point, not just a trial.
It sits in the same space as Doppler and Infisical (developer-first secrets managers) but leans specifically into the AI-agent threat model — minute-level token expiration and zero-knowledge architecture go further than most general-purpose secrets managers, which mostly focus on centralizing and syncing secrets rather than actively preventing the underlying key from ever being exposed. The gap is pricing transparency: beyond "free tier, no card required," the paid tiers aren't detailed on the homepage, so you'll need to sign up to see where the free tier's limits actually bite.
💰 Pricing
📊 Global score
🤖 AI-enriched data
Offre gratuite disponible sans carte bancaire. Paliers payants existants mais non détaillés publiquement sur le site.
Pros
Chiffrement zero-knowledge — même le service ne voit pas les vraies clés en clair
Tokens éphémères à expiration minute, limitent la fenêtre d'exploitation en cas de fuite
Synchronisation en un clic vers Vercel, GitHub, AWS
Plan gratuit sans carte bancaire
Cons
Tarifs des paliers payants non détaillés publiquement
Moins établi que Doppler ou HashiCorp Vault
Pas d'info sur le financement ou l'ancienneté de l'équipe