// MCP TOOL REFERENCE

NEPHYR BACKTEST TOOLS

3 tools from the Nephyr Backtest MCP Server, categorised by risk level.

READ TOOLS

get_available_data Check what historical data is available for a city and date range. Returns counts of cached forecast, observed, and Polymarket price days.

EXECUTE TOOLS

run_copy_backtest Run a copy trading backtest by replaying historical on-chain trades from top Polymarket wallets. Strategies: baseline, top3, consensus, category-fi... run_weather_backtest Run a weather signal backtest over a historical date range. Uses GFS ensemble forecasts vs Polymarket prices. Returns summary stats: win rate, P&L,...

// FAQ

How many tools does the Nephyr Backtest MCP server have? +

The Nephyr Backtest MCP server exposes 3 tools across 2 categories: Read, Execute.

How do I enforce policies on Nephyr Backtest tools? +

Use Intercept, the open-source MCP proxy. Write YAML rules for each tool — rate limits, argument validation, or deny rules — then run Intercept in front of the Nephyr Backtest server.

What risk categories do Nephyr Backtest tools fall into? +

Nephyr Backtest tools are categorised as Read (1), Execute (2). Each category has a recommended default policy.

Let agents act without letting them run wild.

Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.

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