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SimulationHub gathers the simulations that scientists actually run in Nature-family papers — across physics, chemistry, biology, materials, climate and beyond — behind the Simulation Context Protocol (SCP), a strict MCP profile, so coding and computer-use agents can select, run, and discover with them.
The full SimulationHub catalog — every entry is a real tool used by scientists or educators.
Run free simulations with real open models via OpenRouter. A coding agent writes the call for CLI/library sims; a Qwen3-VL + Gemini-3-Flash harness drives the GUI sims by sight.
We read each paper experiment-by-experiment to test whether its science actually depends on a simulation — the evidence behind building SimulationHub.
SCP is a strict profile of MCP (Model Context Protocol): a scientific simulation is an MCP tool, a run is a tools/call, and every scientific extra lives in MCP's own extension points — so any MCP client calls sim #3 exactly like sim #9,000, and SCP-aware clients additionally get selection and the scientific profile.
One Tool descriptor per sim: standard inputSchema/outputSchema, plus taxonomy, cost, conformance, units & provenance carried in MCP _meta under org.simulationhub.scp/.
Live, mock, programmatic and interactive runs all return the same structuredContent: status, outputs, content-addressed artifacts (MCP Resources), metrics, reproducible provenance, and an is_synthetic taint bit.
The scp.find meta-tool ranks the whole catalog so agents select tools (RQ2) and recruit out-of-domain ones (RQ3). Paid sims ship a first-class, schema-valid mock so every task runs end-to-end.
Guarantee levels L0 manifestL1 liveL2 reproducibleL3 interactive plus a harness-authored verification verdict — so RQ1 use and RQ4 distillation are scorable, not just well-formed.
88 Nature-family papers, verified by download, each contributing a benchmark task and the simulations it used.
Auto-generated statistics over the corpus. Full report in analysis/.