Securely Managing External API Credentials for Coding Agents
radim11 · reddit · 2026-08-07
Passing API keys via environment variables in agent workflows poses significant risks, such as accidental logging, committing, or exfiltration. The author discusses strategies to limit the blast radius of credentials, drawing from their work on Stashbase.
The core idea is to allow agents to make API calls without ever seeing the raw credential:
- Developers use a CLI to grant local coding agents access to approved credentials.
- Production apps integrate via an SDK that injects credentials dynamically at request time.
- Credentials can be restricted to specific destinations (e.g., a GitHub token only works for GitHub).
This approach aims to complement, not replace, sandboxing and short-lived tokens by fundamentally preventing the agent from accessing the raw secret.
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