{"uid":"cap_S__n1GdzhKi26LNy-ijP6","slug":"pennyrail-npm-latest-registry-lookup-8e44921a","name":"PennyRail npm.latest Registry Lookup","description":"Machine-readable settlement service","url":"https://pennyrail.vercel.app/api/p/network/npm.latest--npm-registry","method":"POST","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"string"}}},"responseSchema":{"type":"object","additionalProperties":true},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_KKYdZg_wfgr33PfSHKKWb","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches the latest version metadata for an npm package from the npm registry via a paid settlement proxy","exampleAgentPrompt":"What's the latest published version of the lodash npm package?","exampleUseCases":[{"title":"Dependency version check in CI pipeline","prompt":"Can you look up the latest version of axios on npm so I can update my package.json?"},{"title":"Security audit version resolution","prompt":"What is the most recent version of express published to the npm registry? I need to check if we're behind."},{"title":"Automated dependency update bot","prompt":"Fetch the latest npm registry metadata for typescript so I can see what version is current and what the dist-tags say."}],"resultDescription":"Returns a JSON object containing npm registry metadata for the queried package, including the latest version number, dist-tags, description, and other package-level fields as returned by the npm registry.","failureModes":["Package name not found in npm registry — returns error or empty response","Malformed or missing 'input' field — validation error","Payment settlement failure via x402 — 402 Payment Required if credentials are invalid","Rate limiting or upstream npm registry unavailability — upstream timeout or 503"],"whenToPreferThis":"Use this endpoint when you need to programmatically resolve the latest npm package version in an agent workflow that supports x402 micropayment settlement, particularly when you want a lightweight, pay-per-call alternative to self-hosting npm registry queries or using unauthenticated public endpoints.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:06:52.129Z","isFirstParty":false}