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The Herm REST API is described by an OpenAPI 3.1 document: Use the specification with API explorers, contract validators, and SDK generators. It covers the documented core agents, automations, sessions, events, and vaults surface. Product-specific integration endpoints may be released separately. The SSE endpoint is represented as text/event-stream; event envelopes are documented in the Events Reference.
Last modified on July 25, 2026