{"uid":"cap_ExW-W7z9UWmE3DLXVdhnK","slug":"stableemail-64b01d3b","name":"StableEmail Inbox Annual Topup","description":"Top up inbox 365 days ($8, save 34%)","url":"https://stableemail.dev/api/inbox/topup/year","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"username":{"type":"string","allOf":[{"pattern":"^[a-z0-9][a-z0-9-]{1,28}[a-z0-9]$"},{"pattern":"^(?!.*--)"}]}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"8","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":"$8/call","primary":{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"8","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"8","per":"call","confidence":"exact"},{"kind":"static","protocol":"x402","network":"base","amountUsd":"8","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_kl-nUYs0cK7sOJ0sPpY0b","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"8","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null},{"uid":"pm_lTSJQWOox09kI82UsuDFt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"8","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Extends a StableEmail inbox subscription by 365 days for $8 USDC (34% discount over monthly rate)","exampleAgentPrompt":"Renew my StableEmail inbox subscription for a full year — go ahead and pay the $8 to top it up for 365 days so it doesn't expire.","exampleUseCases":null,"resultDescription":"Returns a confirmation that the inbox has been extended by 365 days, along with the new expiry date and updated subscription status.","failureModes":["Payment failure if insufficient USDC balance","Invalid or non-existent inbox identifier returns 404","Inbox already at maximum allowed expiry window","Network timeout during payment processing","Authentication error if inbox ownership cannot be verified"],"whenToPreferThis":"Use this endpoint when you want to renew a StableEmail inbox for a full year at the discounted annual rate ($8 vs ~$12 for 12 monthly topups). Prefer this over the monthly topup when the inbox needs to stay active long-term and cost savings matter.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T00:45:31.533Z","isFirstParty":false}