{"uid":"cap_Bop03plhoS7Bc91Ag6wTz","slug":"stableemail-7bc76ac8","name":"StableEmail Inbox Quarterly Top-Up","description":"Top up inbox 90 days ($2.50, save 17%)","url":"https://stableemail.dev/api/inbox/topup/quarter","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"username":{"type":"string","allOf":[{"pattern":"^[a-z0-9][a-z0-9-]{1,28}[a-z0-9]$"},{"pattern":"^(?!.*--)"}]}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"2.5","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":"$2.5/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"2.5","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"2.5","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9qExGTijMuybSKGMornc-","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"2.5","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Extends an existing StableEmail inbox by 90 days for $2.50 USDC (17% savings over the monthly rate)","exampleAgentPrompt":"Top up my StableEmail inbox for 90 days — I want the quarterly plan to save a bit.","exampleUseCases":null,"resultDescription":"Returns confirmation that the inbox has been extended by 90 days, updated expiry timestamp, and current inbox status after the renewal payment of $2.50 USDC is processed.","failureModes":["Inbox not found or invalid subdomain — returns 404 or equivalent error","Payment failure or insufficient USDC balance — returns payment error","Inbox already deleted or permanently expired — cannot be renewed","Duplicate top-up attempt within a short window — may return conflict error","Network timeout during payment processing — ambiguous state, retry needed"],"whenToPreferThis":"Choose this endpoint over the 30-day top-up ($1) when the inbox needs to stay active for a full quarter and cost savings matter; 90 days costs $2.50 vs $3.00 for three separate monthly renewals. Best when an agent or workflow depends on a stable inbox address over an extended period without frequent renewal calls.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T15:18:52.645Z","isFirstParty":false}