{"name":"STEM Calc (chemistry)","description":"Deterministic chemistry calculations (molar mass, equation balancing, amount conversion, solution pH, dilution) sold per request in AIC credits (x402 aic-escrow). No data source, no LLM: same input, same result.","version":"1.1.0","supportedInterfaces":[{"url":"https://chemcalc.star365.site/a2a","protocolBinding":"JSONRPC","protocolVersion":"1.0"}],"provider":{"organization":"star365","url":"https://star365.site"},"documentationUrl":"https://chemcalc.star365.site/","capabilities":{"streaming":false,"pushNotifications":false,"extensions":[{"uri":"https://github.com/google-agentic-commerce/a2a-x402/blob/main/spec/v0.2","description":"x402 payments over A2A (payment-required → payment-submitted → payment-completed)","required":true},{"uri":"https://aic.star365.site/spec/AIC-PROTOCOL-v0.md","description":"settled in AIC credits via scheme aic-escrow","required":true,"params":{"facilitator":"https://aic.star365.site/v0/x402","network":"aic:credit","payTo":"f8628218-9a76-4718-aa82-7053a2254e66","offers":[{"skill":"molar-mass","amount":"300","maxTimeoutSeconds":60,"method":"GET","resource":"https://chemcalc.star365.site/feed/molar-mass","mimeType":"application/json","queryParams":{"formula":"Ca(OH)2"}},{"skill":"balance","amount":"300","maxTimeoutSeconds":60,"method":"GET","resource":"https://chemcalc.star365.site/feed/balance","mimeType":"application/json","queryParams":{"equation":"Fe + O2 -> Fe2O3"}},{"skill":"amount","amount":"300","maxTimeoutSeconds":60,"method":"GET","resource":"https://chemcalc.star365.site/feed/amount","mimeType":"application/json","queryParams":{"formula":"H2O","unit":"g","value":"36"}},{"skill":"ph","amount":"300","maxTimeoutSeconds":60,"method":"GET","resource":"https://chemcalc.star365.site/feed/ph","mimeType":"application/json","queryParams":{"kind":"weak-acid","c":"0.1","ka":"0.000018"}},{"skill":"dilution","amount":"300","maxTimeoutSeconds":60,"method":"GET","resource":"https://chemcalc.star365.site/feed/dilution","mimeType":"application/json","queryParams":{"c1":"10","c1u":"M","v1":"5","v1u":"mL","c2":"0.5","c2u":"M","v2u":"mL"}}]}}]},"defaultInputModes":["application/json"],"defaultOutputModes":["application/json"],"skills":[{"id":"molar-mass","name":"Molar mass","description":"Molar mass (g/mol) and element-by-element composition of a chemical formula, e.g. Ca(OH)2 or SO4^2-. Deterministic engine, IUPAC atomic weights, no LLM. Price 300 µAIC.","tags":["chemistry","calculation","deterministic"],"examples":["{\"skill\":\"molar-mass\",\"formula\":\"Ca(OH)2\"}"],"inputModes":["application/json"],"outputModes":["application/json"]},{"id":"balance","name":"Balance chemical equation","description":"Smallest whole-number coefficients that balance atoms and charge, e.g. \"Fe + O2 -> Fe2O3\". Refused up front if it cannot be balanced. Price 300 µAIC.","tags":["chemistry","calculation","deterministic"],"examples":["{\"skill\":\"balance\",\"equation\":\"Fe + O2 -> Fe2O3\"}"],"inputModes":["application/json"],"outputModes":["application/json"]},{"id":"amount","name":"Amount conversion","description":"Convert an amount of a substance between grams, moles and particles (Avogadro), e.g. 36 g of H2O. Value: positive decimal, no exponent. Price 300 µAIC.","tags":["chemistry","calculation","deterministic"],"examples":["{\"skill\":\"amount\",\"formula\":\"H2O\",\"unit\":\"g\",\"value\":\"36\"}"],"inputModes":["application/json"],"outputModes":["application/json"]},{"id":"ph","name":"Solution pH","description":"pH of a strong acid/base, a weak monoprotic acid (needs ka) or a buffer (acid c + conjugate base cb + ka), solved from the charge balance including water autoionisation (no shortcut formulas). 25 °C, dilute solutions. Numbers are plain positive decimals, e.g. ka 0.000018. Price 300 µAIC.","tags":["chemistry","calculation","deterministic"],"examples":["{\"skill\":\"ph\",\"kind\":\"weak-acid\",\"c\":\"0.1\",\"ka\":\"0.000018\"}"],"inputModes":["application/json"],"outputModes":["application/json"]},{"id":"dilution","name":"Dilution C1·V1 = C2·V2","description":"Give three of c1, v1, c2, v2 (each with a unit: c1u/c2u in M, mM, uM, nM, g/L, mg/mL, ug/mL, %, ppm; v1u/v2u in L, mL, uL) and get the fourth plus the stock and solvent volumes. Molar and mass units are never mixed. Price 300 µAIC.","tags":["chemistry","calculation","deterministic"],"examples":["{\"skill\":\"dilution\",\"c1\":\"10\",\"c1u\":\"M\",\"v1\":\"5\",\"v1u\":\"mL\",\"c2\":\"0.5\",\"c2u\":\"M\",\"v2u\":\"mL\"}"],"inputModes":["application/json"],"outputModes":["application/json"]}],"signatures":[{"protected":"eyJhbGciOiJFZERTQSIsInR5cCI6IkpPU0UiLCJraWQiOiJhZ2VudDpmODYyODIxOC05YTc2LTQ3MTgtYWE4Mi03MDUzYTIyNTRlNjYifQ","signature":"xsvEST5-j19zS_88xx6_TbBabWEiRt1-vMJaFhENlJCx-fLe8w7tqlw5oxPbKELixMxw9AZrjlGhC0Y0cryBBQ"}]}