{"uid":"cap_EAfvz2EYrRpj6zJyj2v0o","slug":"machine-inbox-pro-pay-per-use-email-inbox-for-agents-f9430710","name":"Machine Inbox Pro — Pay-per-use Email Inbox for Agents","description":"Pay-per-use email inboxes for software agents. Pay $2.00 through Stripe Machine Payments Protocol or x402 USDC, receive mail, and reply over HTTP.","url":"https://machineinbox.com/api/v1/inboxes/pro?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","additionalProperties":false},"type":{"type":"string","const":"http"},"method":{"enum":["POST","PUT","PATCH"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"inbox":{"id":"uuid","address":"m_example@in.machineinbox.com","expiresAt":"2026-09-17T12:00:00.000Z"},"token":"mi_live_..."}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"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":"$5/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"5","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"5","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_BXvrEl808QLpMYhVvZGmo","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"5","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Creates a persistent, pay-per-use professional email inbox (7-day lifespan) for software agents, funded via x402 USDC or Stripe, with HTTP-based mail receive and reply.","exampleAgentPrompt":"Create a new pro email inbox for my agent — one that lasts seven days and supports both receiving mail and replying over HTTP, and pay for it with USDC.","exampleUseCases":[{"title":"Agent outreach campaign inbox","prompt":"Set up a week-long email inbox my agent can use to send outreach emails and receive replies from prospects, paying with USDC."},{"title":"Automated form signup inbox","prompt":"Create a pro inbox my automation bot can use to register for services and receive confirmation emails for the next seven days."},{"title":"Support inbox for an agent fleet","prompt":"Provision a persistent email address that my agent fleet can use to receive and reply to customer support messages via HTTP for the next week."}],"resultDescription":"Returns a JSON object containing the new inbox's UUID, its full email address (e.g. m_example@in.machineinbox.com), an expiration timestamp seven days out, and a bearer token (mi_live_...) used to authenticate subsequent HTTP calls to read mail and send replies.","failureModes":["Payment failure: insufficient USDC balance or invalid x402/Stripe payment header returns 402 Payment Required","Malformed request body: missing required fields (type, method, bodyType, body) returns 400 Bad Request","Rate limiting or quota exceeded returns 429 Too Many Requests","Service unavailability returns 503 with no inbox created","Expired or invalid bearer token on subsequent calls returns 401 Unauthorized"],"whenToPreferThis":"Choose this endpoint when your agent needs a real, replyable email inbox that persists for seven days and must support full two-way communication over HTTP — as opposed to the one-hour verification inbox (for single-use signup codes) or the basic inbox (shorter lived or fewer features). Ideal for multi-step agent workflows that involve email-based back-and-forth with humans or services over several days.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T06:43:45.381Z","isFirstParty":false,"canonicalSlug":"machine-inbox-pro-pay-per-use-email-inbox-for-agents-f9430710"}