{"uid":"cap_5K4XSS288tVVOKSk9ebmb","slug":"forgemesh-periodic-table-api-3509ba0c","name":"Forgemesh Periodic Table API","description":"Periodic table API: full data for any of the 118 elements by symbol, name, or atomic number — atomic mass, category, phase, electron configuration, electronegativity, melting/boiling points, density, and more.","url":"https://x402.forgemesh.io/periodic-table","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"element":{"type":"string","description":"symbol, name, or atomic number"}}},"responseSchema":{"type":"json","example":{"name":"Iron","symbol":"Fe","category":"transition metal","atomic_mass":55.845,"atomic_number":26,"melting_point_k":1811.15}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_zLm2PlRVrErjxj1Tau3o-","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns full elemental data for any of the 118 chemical elements, including atomic mass, category, phase, electron configuration, electronegativity, melting/boiling points, and density, looked up by symbol, name, or atomic number.","exampleAgentPrompt":"What are the full properties of gold — atomic mass, electron configuration, electronegativity, melting point, boiling point, density, phase, and category?","exampleUseCases":null,"resultDescription":"A structured data object with comprehensive elemental properties for the requested element, including atomic mass, atomic number, symbol, name, category (e.g. noble gas, transition metal), standard phase, electron configuration, electronegativity (Pauling scale), melting point, boiling point, and density.","failureModes":["Element not found if the symbol, name, or atomic number is invalid or misspelled — likely a 404 or error field in response","Atomic number out of range (>118 or <1) returns an error","Ambiguous or partial names may fail to match — full element name or standard symbol recommended","Payment failure if USDC balance is insufficient for the $0.002 per-call fee"],"whenToPreferThis":"Use this endpoint when you need structured, machine-readable elemental data for any of the 118 known chemical elements — ideal for chemistry applications, educational tools, materials lookup, or any workflow requiring precise elemental properties like atomic mass, electron configuration, or thermodynamic data. Prefer this over a general encyclopedia API when you specifically need tabular/structured elemental data rather than prose descriptions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:55:25.266Z","isFirstParty":false}