{"uid":"cap_JgU8UCVQqRBLcCERqL8Lz","slug":"compound-physicochemical-properties-lookup-pubchem-c6744fea","name":"Compound Physicochemical Properties Lookup (PubChem)","description":"PHARMA: physicochemical properties for a compound (PubChem) — formula, MW, SMILES, IUPAC, XLogP, TPSA. ?q=name. Returns JSON.","url":"https://clonecho.builda.company/x402/compound-properties","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wGu0hcQGAMUYHhWwBXWB5","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x036CbD53842c5426634e7929541eC2318f3dCF7e","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns key physicochemical properties for a named chemical compound sourced from PubChem, including molecular formula, molecular weight, SMILES, IUPAC name, XLogP, and TPSA.","exampleAgentPrompt":"Can you look up the physicochemical properties of ibuprofen for me — I need the molecular formula, molecular weight, SMILES, IUPAC name, XLogP, and TPSA?","exampleUseCases":null,"resultDescription":"A JSON object containing the compound's molecular formula, molecular weight, canonical SMILES, IUPAC name, XLogP (lipophilicity coefficient), and TPSA (topological polar surface area), sourced from PubChem.","failureModes":["Compound name not found in PubChem — returns empty or error response","Ambiguous compound name matching multiple PubChem entries — may return unexpected compound","Missing or malformed ?q= parameter — returns 400 or error","PubChem upstream unavailable — returns 502 or timeout","Non-chemical query string (e.g. brand name not in PubChem) — no results"],"whenToPreferThis":"Use this endpoint when you need rapid, structured physicochemical property data for a named chemical compound and want PubChem-sourced values for formula, MW, SMILES, IUPAC, XLogP, and TPSA in a single JSON response. Prefer this over raw PubChem API calls when you want a paid, low-latency wrapper with consistent output structure. Best suited for drug discovery, ADMET screening, cheminformatics pipelines, or any workflow that needs lipophilicity or polarity data for a molecule by name.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:21:56.218Z","isFirstParty":false}