🧪 simulation-harness

The Simulation Harness is a platform-agnostic, LLM-driven environment for simulating MCP tools and skills. Agent developers and DevOps engineers can execute tools without real backends, credentials, or the risk of irreversible side effects.

Use cases

• Catalog exploration — click “Try” in a catalog and see realistic responses in seconds.
• Skill/tool optimization — run hundreds of optimization trials per hour without burning real API budgets.
• Course-of-action rehearsal — let agents rehearse potentially irreversible actions before doing them for real.

Highlights

• One OpenAPI spec → one simulation — generates a simulation skill and serves schema-valid, plausible responses.
• MCP-native — exposes tools over SSE and Streamable HTTP to any MCP-capable consumer.
• Stateful sessions — multi-call coherence with configurable limits and idle timeouts.
• Zero setup — no credentials, sandboxes or test data required.