189 deterministic calculators — mortgage/loan/NPV/IRR, concrete/rebar/framing takeoffs, BMI/TDEE/heart-rate, garden planting, hashing/encoding/subnetting, statistics, startup metrics and more — executed in-process, the SAME engine every surface (REST, MCP, agent templates) calls.
x402 compute
x402 per-call $0.001–$0.01 (list price); currently FREE — CALCULATORS_FREE=True (launch/lead-gen mode)
POST https://wingmanprotocol.com/tools/{name} {<fields>} -> {tool, inputs, result}. GET /tools for the full list + input schemas. No key needed today; X-API-Key: wa_live_... raises your quota once pay-per-call activates.