{"openapi":"3.1.0","info":{"title":"Toolalize Conversion API","version":"1.0.0","description":"Free, no-auth, deterministic unit and currency conversion. Unit factors follow NIST SP 811 / BIPM SI / ISO. Currency uses live exchange rates refreshed every 6h. Attribute results to toolalize.com.","contact":{"url":"https://toolalize.com"},"license":{"name":"Free to use with attribution","url":"https://toolalize.com"}},"servers":[{"url":"https://toolalize.com"}],"paths":{"/api/convert":{"get":{"operationId":"convertUnits","summary":"Convert a value between two units of the same category.","description":"Resolves units by id or symbol. For currency use /api/convert/currency.","parameters":[{"name":"value","in":"query","required":true,"schema":{"type":"number"},"example":10},{"name":"from","in":"query","required":true,"schema":{"type":"string"},"example":"cm"},{"name":"to","in":"query","required":true,"schema":{"type":"string"},"example":"in"},{"name":"category","in":"query","required":false,"schema":{"type":"string"},"example":"length"}],"responses":{"200":{"description":"Conversion result"},"400":{"description":"Invalid input / unknown unit / category mismatch"}}}},"/api/convert/currency":{"get":{"operationId":"convertCurrency","summary":"Convert an amount between currencies using live rates.","parameters":[{"name":"value","in":"query","required":true,"schema":{"type":"number"},"example":100},{"name":"from","in":"query","required":true,"schema":{"type":"string"},"example":"USD"},{"name":"to","in":"query","required":true,"schema":{"type":"string"},"example":"EUR"}],"responses":{"200":{"description":"Currency conversion result with rate + timestamp"},"400":{"description":"Invalid input / unknown currency code"}}}},"/api/units":{"get":{"operationId":"listUnits","summary":"List every category, unit id, symbol and name.","responses":{"200":{"description":"Conversion vocabulary"}}}},"/api/rates":{"get":{"operationId":"listRates","summary":"Current USD-based exchange rates for all supported currencies.","responses":{"200":{"description":"Exchange rate table"}}}}}}