Cycles is open-source runtime authority for autonomous agents.

It adds a pre-execution reserve/commit layer so agents cannot exceed spend, risk, or action limits while calling models, APIs, tools, databases, or external systems.

Instead of finding out after the bill, log, or incident, Cycles checks before the next action runs. No remaining budget or policy allowance means no next action.

Built for teams running agentic workflows that need hard limits, multi-tenant isolation, retry-safe accounting, and an audit trail of gated actions.

Self-hosted. Apache 2.0. No prompt storage. SDKs for Python, TypeScript, and Java/Spring.