{"uid":"cap_2JeMgOaQWfXlLG6cIf87r","slug":"fx402-physical-unit-converter-1d607948","name":"fx402 Physical Unit Converter","description":"Pay-per-call currency and unit conversion utility for AI agents: currency exchange at ECB daily reference rates, FX rate tables, and physical unit conversion (length, mass, temperature, volume, area, speed, time, digital). No API key, no subscription — agents pay per request via x402 (Base/USDC) or MPP (Tempo/pathUSD).","url":"https://fx402.alogos.xyz/v1/units","method":"GET","headers":{},"bodySchema":{"type":"object","required":["to","from","value"],"properties":{"to":{"type":"string","description":"Target unit symbol in the same category, e.g. 'mi'."},"from":{"type":"string","description":"Source unit symbol, e.g. 'km', 'kg', 'C', 'L', 'mph', 'GiB'."},"value":{"type":"number","description":"Numeric value to convert."}}},"responseSchema":{"type":"object","properties":{"to":{"type":"string"},"from":{"type":"string"},"value":{"type":"number"},"result":{"type":"number"},"category":{"type":"string"},"converted":{"type":"number"}},"additionalProperties":true},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_lq0f_Pj--Lhd_0fW0dNsJ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Converts a numeric value from one physical unit to another across categories like length, mass, temperature, volume, area, speed, time, and digital storage — pay-per-call via x402/USDC.","exampleAgentPrompt":"Convert 26.2 miles to kilometers for me — using the fx402 unit converter.","exampleUseCases":null,"resultDescription":"The agent receives the converted numeric value expressed in the target unit, computed precisely from the given source value and unit symbols.","failureModes":["Incompatible unit categories (e.g. converting 'kg' to 'km') — returns an error indicating unit mismatch","Unknown or misspelled unit symbol — returns an error listing unrecognized symbol","Missing required parameter (from, to, or value) — returns a 400-level validation error","Payment failure via x402/MPP — returns 402 Payment Required before conversion is performed"],"whenToPreferThis":"Choose this endpoint when an AI agent needs a reliable, serverless, pay-per-call physical unit conversion without requiring an API key or subscription — especially in automated workflows where pre-paid USDC micropayments via x402 on Base are acceptable. Prefer this over currency conversion endpoints when converting physical quantities like length, weight, temperature, or digital storage.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:35:10.013Z","isFirstParty":false}