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StableEmail

StableEmail

Email
Pay-per-send email delivery. No API keys, no accounts.
Available through Sponge
MPPx402

About StableEmail

Review the Service identity, supported languages, protocol versions, and source metadata discovered by the directory.

Service details

Service Id
45441a58-cbf1-4aa9-8e47-5bfd9ceabe1e
Service origin
https://stableemail.dev
ListedSeptember 24, 2026, 6:58 PM
Last checkedNovember 8, 2026, 11:15 PM

Protocol details

SourceOpenAPI

Endpoints

Endpoint details are saved from the OpenAPI document. Authentication requirements and prices are advertised information, not a verified payment or access guarantee. The document may contain additional endpoints.Open OpenAPI document
POST/api/inbox/buy

Buy an inbox on stableemail.dev ($1, 30 days). forwardTo is optional — omit it to use as a programmatic mailbox via the message…

1 USD
POST/api/inbox/cancel

Cancel inbox and get pro-rata refund (free)

The operation requires declared authentication; API keys, bearer tokens and other schemes are not evidence of AEP support.
POST/api/inbox/list

List all inboxes owned by the authenticated wallet (free)

The operation requires declared authentication; API keys, bearer tokens and other schemes are not evidence of AEP support.
POST/api/inbox/messages

List messages in your inbox ($0.001)

0.001 USD
POST/api/inbox/messages/delete

Delete a single inbox message (free)

The operation requires declared authentication; API keys, bearer tokens and other schemes are not evidence of AEP support.
POST/api/inbox/messages/read

Read a single inbox message ($0.001). Returns text, HTML, and attachment download URLs (1hr expiry). Message content available …

0.001 USD
POST/api/inbox/send

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

0.005 USD
GET/api/inbox/status

Check inbox status (free)

The operation requires declared authentication; API keys, bearer tokens and other schemes are not evidence of AEP support.
POST/api/inbox/topup

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

1 USD
POST/api/inbox/topup/quarter

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

2.5 USD
POST/api/inbox/topup/year

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

8 USD
POST/api/inbox/update

Update inbox settings (free)

The operation requires declared authentication; API keys, bearer tokens and other schemes are not evidence of AEP support.
POST/api/send

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

0.02 USD
POST/api/subdomain/buy

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

5 USD
POST/api/subdomain/inbox/create

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

0.25 USD
POST/api/subdomain/inbox/delete

Delete an inbox on a subdomain (free)

The operation requires declared authentication; API keys, bearer tokens and other schemes are not evidence of AEP support.
POST/api/subdomain/inbox/list

List inboxes on a subdomain (free)

The operation requires declared authentication; API keys, bearer tokens and other schemes are not evidence of AEP support.
POST/api/subdomain/inbox/messages

List messages in a subdomain inbox ($0.001)

0.001 USD
POST/api/subdomain/inbox/messages/delete

Delete a single subdomain inbox message (free)

The operation requires declared authentication; API keys, bearer tokens and other schemes are not evidence of AEP support.
POST/api/subdomain/inbox/messages/read

Read a single subdomain inbox message ($0.001). Returns text, HTML, and attachment download URLs (1hr expiry). Message content …

0.001 USD
POST/api/subdomain/inbox/update

Update subdomain inbox settings (free)

The operation requires declared authentication; API keys, bearer tokens and other schemes are not evidence of AEP support.
POST/api/subdomain/send

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

0.005 USD
POST/api/subdomain/signers

Manage authorized signers for a subdomain (free)

The operation requires declared authentication; API keys, bearer tokens and other schemes are not evidence of AEP support.
GET/api/subdomain/status

Check subdomain status (free)

The operation requires declared authentication; API keys, bearer tokens and other schemes are not evidence of AEP support.
POST/api/subdomain/update

Update subdomain settings (free)

The operation requires declared authentication; API keys, bearer tokens and other schemes are not evidence of AEP support.

Agent payments

These payment protocols and options are advertised by the Service for agent purchases.

MPP

Advertises MPP payments for one or more endpoints. Check the endpoint documentation for authentication requirements.

x402

Advertises x402 payments for one or more endpoints. Check the endpoint documentation for authentication requirements.