{"uid":"cap_FuKmTOb5XioSgqDMhFBHx","slug":"lilambd-isotopes-lookup-9e76f17b","name":"lilambd Isotopes Lookup","description":"A crossing for play, feeling, language, science and computation — creating states that do not have names yet.","url":"https://api.lilambd.com/units/isotopes?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","queryParams"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":[],"properties":{"limit":{"type":"string","description":"Max rows (1-200, default 50)"},"offset":{"type":"string","description":"Rows to skip"},"element":{"type":"string","description":"Element symbol"}},"additionalProperties":{"type":"string"}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"json"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"data":[],"count":0,"attribution":"source licence line"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_QvfsIK0apo2LN4Frb3Vl-","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a paginated list of chemical isotopes, optionally filtered by element symbol.","exampleAgentPrompt":"Can you fetch the isotopes for carbon from lilambd — show me up to 100 results?","exampleUseCases":[{"title":"Research isotopes of a specific element","prompt":"I need all the isotopes for uranium from lilambd's isotope dataset — get me up to 200 results."},{"title":"Paginated isotope table exploration","prompt":"Pull the first 50 isotopes from the lilambd isotopes endpoint, then get the next 50 after that so I can browse the full dataset."},{"title":"Element isotope count lookup","prompt":"How many isotopes does hydrogen have? Check the lilambd isotopes API filtered by element H and tell me the count."}],"resultDescription":"A JSON object with a `data` array of isotope records, a `count` of total matching records, and an `attribution` string crediting the source license. The data array is paginated based on limit and offset parameters.","failureModes":["Invalid element symbol returns empty data array with count 0","limit value out of range (1-200) may return default 50 rows or an error","Missing required `input` object results in a validation error","Payment not included or insufficient USDC results in HTTP 402 response","offset larger than total count returns empty data array"],"whenToPreferThis":"Use this endpoint when you need structured, paginated isotope data filterable by element symbol and backed by attributed scientific sources. Prefer it over general chemistry APIs when you need lightweight per-call pricing via x402 micropayments rather than subscription access.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-02T18:33:01.658Z","isFirstParty":false,"canonicalSlug":"lilambd-isotopes-lookup-9e76f17b"}