Keychains.dev
Keychains.dev is a credential delegation layer that lets AI agents call external APIs without ever seeing the underlying secrets.
About
Keychains.dev is a credential delegation layer that lets AI agents call external APIs without ever seeing the underlying secrets. It works by replacing hardcoded credentials with template variables in API calls, then injecting real credentials server-side through a proxy — so the agent gets API access but the raw key never enters its environment. SSH-based machine authentication, stateful key fingerprinting, and instant revocation make it practical for production agent deployments where prompt injection or credential leakage is a real concern.
Developers and security-conscious teams building AI agents that need to access third-party APIs at scale, particularly where multiple agents share overlapping credentials and revocation or audit capabilities are required.
Pros & Cons
Pros
- check Agents get scoped API access across 6,800+ providers without any secret leaving the server-side injection layer
- check Stateful fingerprinting invalidates a leaked key on first use, containing the blast radius of a credential compromise
- check Full audit trail of every permission and API call made by each agent gives visibility that raw credential sharing doesn't
- check Instant revocation works without rotating the underlying secret, reducing operational friction in incident response
- check Supports OAuth 2.0 with PKCE, API keys, and basic auth, covering the majority of real-world API authentication patterns
Cons
- close Pricing is not publicly disclosed, making it difficult to assess cost before committing to a trial or sales conversation
- close Proxying all credential injection through Keychains infrastructure introduces a dependency on their uptime for any agent API call
- close The template variable approach requires modifying existing agent code, which adds a migration cost for established codebases
- close No information available on self-hosting options for teams with strict data residency requirements
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