{"uid":"cap__FdXLQpCFdUwPPsGHiN6p","slug":"stableemail-send-21e55982","name":"StableEmail Forwarding Inbox Send","description":"Send email from your forwarding inbox on stableemail.dev ($0.005)","url":"https://stableemail.dev/api/inbox/send?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","required":["username","to","subject"],"properties":{"cc":{"type":"array","items":{"type":"string","format":"email","pattern":"^(?!\\.)(?!.*\\.\\.)([A-Za-z0-9_'+\\-\\.]*)[A-Za-z0-9_+-]@([A-Za-z0-9][A-Za-z0-9\\-]*\\.)+[A-Za-z]{2,}$"},"maxItems":50,"minItems":1},"to":{"type":"array","items":{"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,}$"},"maxItems":50,"minItems":1},"html":{"type":"string","maxLength":256000},"text":{"type":"string","maxLength":256000},"replyTo":{"type":"string","format":"email","pattern":"^(?!\\.)(?!.*\\.\\.)([A-Za-z0-9_'+\\-\\.]*)[A-Za-z0-9_+-]@([A-Za-z0-9][A-Za-z0-9\\-]*\\.)+[A-Za-z]{2,}$"},"subject":{"type":"string","maxLength":998,"minLength":1},"username":{"type":"string","allOf":[{"pattern":"^[a-z0-9][a-z0-9-]{1,28}[a-z0-9]$"},{"pattern":"^(?!.*--)"}]},"attachments":{"type":"array","items":{"type":"object","required":["content","contentType","filename"],"properties":{"content":{"type":"string","maxLength":5000000},"filename":{"type":"string","maxLength":255,"minLength":1},"contentType":{"type":"string","maxLength":255,"minLength":1}}},"maxItems":5}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["email","send","inbox","forwarding","subdomain","social"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":2,"rating":{"score":"0.67","successRate":"0.96","reviews":2,"stars":"3.7","state":"rated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},{"kind":"static","protocol":"mpp","network":"tempo","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_EzPJXyZT8XroNmYwMgHpZ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null},{"uid":"pm_BbjbjX-WnW3rLCU0JEORq","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x20c000000000000000000000b9537d11c60e8b50","unit":"request","depositMicros":null,"planRef":null}],"brandName":"StableEmail","brandSlug":"stableemail","brandBaseUrl":"https://stableemail.dev","brandDocsUrl":"https://stableemail.dev","whatItDoes":"Sends an email from the caller's own forwarding inbox username on stableemail.dev to one or more recipients","exampleAgentPrompt":"Send an email from my stableemail inbox 'myproject' to alice@example.com with the subject 'Project Update' and the message body 'Hi Alice, just wanted to let you know the project is on track. Best, Bob.'","exampleUseCases":[{"title":"Automated weekly report delivery","prompt":"Every Monday morning, send a summary report email from my stableemail inbox 'reports' to the whole team at team@mycompany.com with the subject 'Weekly Metrics Report' and include the performance numbers we pulled from the dashboard."},{"title":"Customer order confirmation emails","prompt":"When a new order comes in from the store, send a confirmation email from my stableemail inbox 'orders' to the customer's email address with the subject 'Your Order Has Been Confirmed' and a message thanking them and including their order details."},{"title":"Outreach campaign from named inbox","prompt":"Send a personalized outreach email from my stableemail inbox 'sales' to potential@clientbusiness.com with the subject 'Quick Question About Your Team' and a short friendly message introducing our product and asking if they'd be open to a 15-minute chat."}],"resultDescription":"A confirmation that the email was sent from the specified stableemail.dev forwarding inbox to the listed recipients. No body payload is returned beyond a success acknowledgment.","failureModes":["Invalid or unregistered username — inbox does not exist or has expired","Invalid recipient email format — 400 validation error","Missing required fields (username, to, subject) — 400 bad request","Inbox not funded or expired — payment/authorization failure","Attachment size or count exceeds limits (max 5 attachments, 5MB each) — 400 error","Payment failure — insufficient USDC balance for $0.005 charge","Too many recipients — to or cc array exceeds 50 items"],"whenToPreferThis":"Choose this endpoint when you need to send email from a specific named forwarding inbox on stableemail.dev (i.e. username@stableemail.dev) rather than the generic relay address. At $0.005 per send it is cheaper than the generic Send endpoint ($0.02). Use it when the sender identity/username matters or when you want replies to go to the inbox you own.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":269,"lastUsedAt":"2026-08-04T14:03:23.477Z","lastSuccessfullyRanAt":"2026-08-04T14:03:23.477Z","lastHealthCheckAt":"2026-10-11T12:39:43.847Z","isFirstParty":false,"canonicalSlug":"stableemail-send-21e55982"}