{"uid":"cap_MeSrTrqSkQLzfQi9dsi2J","slug":"pennyrail-number-sum-add-numbers-c0c4c711","name":"PennyRail Number Sum (Add Numbers)","description":"Machine-readable settlement service","url":"https://pennyrail.vercel.app/api/p/nano/number.sum--add-numbers","method":"POST","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"array"}}},"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_77z75ujz1NL1x-O0Je81a","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":"Accepts an array of numbers and returns their sum via a pay-per-call micropayment API.","exampleAgentPrompt":"Can you add up these numbers for me using PennyRail: 12, 45.5, 8, and 100?","exampleUseCases":[{"title":"Totaling line-item costs","prompt":"I have a list of purchase amounts — 19.99, 5.50, 34.00, and 2.75 — can you add them all up and tell me the total?"},{"title":"Summing sensor readings","prompt":"I've got a batch of sensor readings: 102, 98, 115, 110, and 107. Can you calculate their total for me?"},{"title":"Aggregating vote counts","prompt":"Add up these vote tallies for me: 4823, 1102, 7761, and 340 — what's the grand total?"}],"resultDescription":"A JSON object containing the computed sum of all numbers in the input array. The response schema is open (additionalProperties: true), so the sum value may appear alongside metadata or status fields.","failureModes":["Empty or missing 'input' array returns a validation error","Non-numeric values in the array may cause a computation error or unexpected result","Payment failure (insufficient USDC balance) results in a 402 Payment Required response","Malformed JSON body returns a 400 Bad Request","Vercel cold-start may occasionally add latency on first call"],"whenToPreferThis":"Choose this endpoint when you need a quick, pay-per-call arithmetic sum over a list of numbers and already operate in an x402 micropayment-enabled agent environment. It is suitable for lightweight automation pipelines that need on-demand numeric aggregation without setting up a math library or local computation. Prefer local computation for very large arrays or high-frequency calls where per-call cost would accumulate significantly.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:21:50.377Z","isFirstParty":false}