The Harbinger is an open-source mutual TLS proxy intended to give AI agents certificate-based identity instead of requiring them to directly hold API keys. It was submitted to Hacker News as a Show HN project, where the listing had a score of 4 and one comment at the supplied publication time. The available source material does not establish its security model, supported integrations, operational maturity, or production readiness. Its main significance is architectural: credentials could be mediated by an identity-aware proxy rather than embedded in agent runtimes or tool configurations.
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