# postern

> Credential-brokering HTTPS proxy for AI agents

Postern is an HTTPS forward proxy that injects secrets from 1Password, Bitwarden, or OAuth2 providers into outbound API calls. It keeps API keys and tokens completely outside the agent's reach to prevent exfiltration via prompt injection or compromised dependencies. It runs as a command-line binary or as a Docker container.

- Source: https://github.com/mmartinez/postern
- License: Apache-2.0
- Built with: Go 98.6%, Other 1.4%
- Stars: 11
- Forks: 3
- Contributors: 3
- Last commit: 2026-10-10
- Latest release: v0.10.2 (2026-10-10)
- Purpose: AI & LLM tooling, Infra & DevOps, Security & identity
- Type: Docker / self-host, CLI
- For: Personal, Enterprise

## Worth score: 55/100

How much DigGitHub recommends it, from activity, adoption, docs, license and security signals.

- Popularity: 5/25
- Momentum: 10/20
- Maintenance: 25/25
- Community: 3/15
- Readiness: 12/15

## Downloads

Latest release: [v0.10.2](https://github.com/mmartinez/postern/releases/tag/v0.10.2). Files from the project's GitHub release, not checked by DigGitHub.

Source code only: this release has no files to download.

## Alternatives

- [trustless](https://diggithub.com/ikkun1222/trustless.md): Credential broker CLI and proxy for AI agents
- [infisical](https://diggithub.com/Infisical/infisical.md): Open-source secrets, certificate, and privileged access platform
- [agent-vault](https://diggithub.com/CrimsonWorks-Inc/agent-vault.md): Local credential proxy for coding agents
- [Shannon](https://diggithub.com/KeygraphHQ/shannon.md): AI pentester for your web apps and APIs
- [portunus](https://diggithub.com/mdostal/portunus.md): Boundary-only secret broker keeping credentials out of LLM contexts
- [firezone](https://diggithub.com/firezone/firezone.md): WireGuard-based remote access platform and VPN server
- [agent-vault](https://diggithub.com/Infisical/agent-vault.md): HTTP credential proxy and vault for AI agents
- [keyward](https://diggithub.com/arturayupov/keyward.md): Local, encrypted secret broker for AI coding agents

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Source page: https://diggithub.com/mmartinez/postern
Updated: 2026-10-30