{"uid":"cap_OXzVaZ56HtmQbRkzToPQW","slug":"pennyrail-nano-percent-change-calculator-cdf2fb66","name":"PennyRail Nano Percent Change Calculator","description":"Machine-readable settlement service","url":"https://pennyrail.vercel.app/api/p/nano/number.percent-change--change-percentage?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"object"}}},"responseSchema":{"type":"object","additionalProperties":true},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_E5XW1EV-pzvJZcmaGRa5v","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the percent change (percentage change) between two numeric values","exampleAgentPrompt":"What is the percent change from 250 to 315? I need the percentage increase calculated.","exampleUseCases":[{"title":"Stock price movement analysis","prompt":"Calculate the percent change in this stock price — it went from $142.50 yesterday to $158.75 today. What's the percentage gain?"},{"title":"Monthly revenue growth tracking","prompt":"Our revenue last month was $84,000 and this month it's $91,200. What's the percentage change between those two figures?"},{"title":"Weight loss progress calculation","prompt":"I started at 195 pounds and now I'm at 178 pounds. What's my percent change in weight?"}],"resultDescription":"Returns a computed percent change value representing the relative difference between an original and new number, expressed as a percentage (e.g. +12.5 or -8.3). The response is a JSON object with the calculated change percentage.","failureModes":["Missing or malformed input numbers causing a 400 error","Division by zero if original value is zero","Non-numeric input values returning a validation error","Payment failure (402) if USDC balance is insufficient","Service unavailability on the Vercel deployment returning 503"],"whenToPreferThis":"Use this endpoint when you need a quick, machine-readable percent change computation without implementing the formula yourself. It is especially useful in automated pipelines where consistent formatting of percentage deltas is needed. Prefer this over a general-purpose math library call when you are already operating within the PennyRail x402 micropayment ecosystem and want a single consistent numeric transformation service.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T06:47:20.698Z","isFirstParty":false,"canonicalSlug":"pennyrail-nano-percent-change-calculator-cdf2fb66"}