register_fitness_function
Add custom metric
How to use it
register_fitness_function is exposed by the Evolve MCP MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the register_fitness_function tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.
Install Evolve MCP
claude mcp add evolve-mcp -- python -m mcp_server.serverOther tools in Evolve MCP (20)
Add custom pattern
Get complexity metrics
Stop a running cycle
Should evolve?
Quick text check
Combine two variants
Find anomalies
Calculate fitness score
Detailed breakdown
Create A/B test pair
Create variant population
Check cycle progress
Aggregated metrics
List available
Apply specific mutation
Log performance data
Resume from checkpoint
Begin an evolution cycle
Adjust weights
Full safety check