Lab-measured tennis string data in your AI: search, look up, compare and get recommendations from stiffness, tension loss, energy return and spin measurements of nearly 800 strings, through the StringSpec MCP server, plus a skill that knows how to read the numbers.
https://stringspec.com/mcpStringSpec: lab measurements of 791 tennis strings (stiffness, tension loss, energy return, spin potential, friction, elongation), with retail prices. Use for one named string, for two or three, when a player describes what they want (spin, comfort or arm pain, control, power, tension hold, durability, feel), and to filter or sort by brand, material, gauge, a measurement or price. Lower stiffness is softer and kinder on the arm; lower tension loss holds tension longer. Present measurements as measurements and estimates (playable life, tension advice) as estimates. Give the StringSpec url when the user wants the full page.
1 in the Claude listing