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StableEmail

Pay-per-send email delivery. No API keys, no accounts.

GET

/api/inbox/status

FREE
Check inbox status (free)
POST

/api/inbox/buy

$1.00
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.
POST

/api/inbox/cancel

FREE
Cancel inbox and get pro-rata refund (free)
POST

/api/inbox/messages

$0.001
List messages in your inbox ($0.001)
POST

/api/inbox/messages/delete

FREE
Delete a single inbox message (free)
POST

/api/inbox/messages/read

$0.001
Read a single inbox message ($0.001). Returns text, HTML, and attachment download URLs (1hr expiry). Message content available for 90 days from receipt.
POST

/api/inbox/send

$0.005
Send email from your forwarding inbox on stableemail.dev ($0.005)
POST

/api/inbox/topup

$1.00
Top up a forwarding inbox for 30 days ($1)
POST

/api/inbox/topup/quarter

$2.50
Top up a forwarding inbox for 90 days ($2.50, save 17%)
POST

/api/inbox/topup/year

$8.00
Top up a forwarding inbox for 365 days ($8, save 34%)
POST

/api/inbox/update

FREE
Update inbox settings (free)

POST

/api/send

$0.02
Send an email from "StableEmail" <relay@stableemail.dev> ($0.02)

GET

/api/subdomain/status

FREE
Check subdomain status (free)
POST

/api/subdomain/buy

$5.00
Purchase a custom email subdomain on stableemail.dev ($5)
POST

/api/subdomain/inbox/create

$0.25
Create an inbox on your subdomain ($0.25). Max 100 inboxes, 500 messages each. Message content and attachments retained for 90 days.
POST

/api/subdomain/inbox/delete

FREE
Delete an inbox on a subdomain (free)
POST

/api/subdomain/inbox/list

FREE
List inboxes on a subdomain (free)
POST

/api/subdomain/inbox/messages

$0.001
List messages in a subdomain inbox ($0.001)
POST

/api/subdomain/inbox/messages/delete

FREE
Delete a single subdomain inbox message (free)
POST

/api/subdomain/inbox/messages/read

$0.001
Read a single subdomain inbox message ($0.001). Returns text, HTML, and attachment download URLs (1hr expiry). Message content available for 90 days from receipt.
POST

/api/subdomain/inbox/update

FREE
Update subdomain inbox settings (free)
POST

/api/subdomain/send

$0.005
Send email from your custom subdomain on stableemail.dev ($0.005)
POST

/api/subdomain/signers

FREE
Manage authorized signers for a subdomain (free)
POST

/api/subdomain/update

FREE
Update subdomain settings (free)

Install on Your Agent

Add StableEmail skills to any client

npx agentcash add https://stableemail.dev
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