{"uid":"cap_nmLcALAeo4RfdcjYRgI01","slug":"stableemail-buy-150c910b","name":"StableEmail Buy Inbox","description":"Buy an inbox on stableemail.dev ($1, 30 days). forwardTo is optional — omit it to use as a programmatic mailbox via the messages API (retainMessages enabled automatically). Message content and attachments are retained for 90 days.","url":"https://stableemail.dev/api/inbox/buy?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","required":["username"],"properties":{"username":{"type":"string","allOf":[{"pattern":"^[a-z0-9][a-z0-9-]{1,28}[a-z0-9]$"},{"pattern":"^(?!.*--)"}]},"forwardTo":{"type":"string","format":"email","pattern":"^(?!\\.)(?!.*\\.\\.)([A-Za-z0-9_'+\\-\\.]*)[A-Za-z0-9_+-]@([A-Za-z0-9][A-Za-z0-9\\-]*\\.)+[A-Za-z]{2,}$"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["email","send","inbox","forwarding","subdomain","social"],"displayCostAmount":"1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":1,"rating":{"score":"1.00","successRate":"1.00","reviews":1,"stars":"5.0","state":"rated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$1/call","primary":{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"1","per":"call","confidence":"exact"},{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_PqrCNXxRx0G3a6g1MgL5E","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"1","costPer":"request","priority":0,"asset":"0x20c000000000000000000000b9537d11c60e8b50","unit":"request","depositMicros":null,"planRef":null},{"uid":"pm_sE69JHEGeqCeqqR0bD9qK","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"1","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":"StableEmail","brandSlug":"stableemail","brandBaseUrl":"https://stableemail.dev","brandDocsUrl":"https://stableemail.dev","whatItDoes":"Purchases a new email inbox on stableemail.dev for $1 USDC, valid for 30 days, with optional email forwarding or programmatic message access.","exampleAgentPrompt":"Buy me a new inbox on StableEmail for the username 'devtest42' and forward everything to me@mycompany.com.","exampleUseCases":null,"resultDescription":"Returns the newly created inbox details including the full email address (username@stableemail.dev), expiry timestamp (30 days from creation), and confirmation that message retention is enabled (90 days for content and attachments). If forwardTo was omitted, the response confirms retainMessages is active so messages can be retrieved via the messages API.","failureModes":["Username already taken — returns a conflict/400 error","Username fails regex validation (too short, contains consecutive hyphens, starts/ends with hyphen) — returns 400 validation error","Invalid forwardTo email format — returns 400 validation error","Payment failure or insufficient USDC balance — returns 402 payment required","Service unavailable — returns 5xx error"],"whenToPreferThis":"Use this endpoint when you need to create a new, fresh email inbox from scratch on stableemail.dev — either as a forwarding address (messages relayed to your real inbox) or as a programmatic mailbox you can poll via the messages API. Prefer this over the Topup endpoint (which renews an existing inbox) or the subdomain purchase endpoint (which buys a custom subdomain). Ideal for temporary, disposable, or test inboxes where no persistent account setup is wanted.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":3,"lastUsedAt":"2026-08-21T15:08:04.689Z","lastSuccessfullyRanAt":"2026-08-21T15:08:04.689Z","lastHealthCheckAt":"2026-10-10T00:51:28.933Z","isFirstParty":false,"canonicalSlug":"stableemail-buy-150c910b"}