Discover / stableemail.dev

StableEmail

□ No challenge detected

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

MPP
x402
Base
Solana
Tempo
USDC
social

Challenge detected: 0 of the last 9 checks
Last checked: 16 Oct, 21:16 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://stableemail.dev/api/inbox/buy
# 402 Payment Required: pay with a MPP client, then send the request again.

24 listed endpoints · on mpp.dev and mppscan

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://stableemail.dev/api

GET/inbox/statusNo price listedCheck inbox status and expiry
POST/subdomain/updateNo price listedUpdate subdomain settings (catch-all forwarding)
POST/subdomain/inbox/updateNo price listedUpdate subdomain inbox settings
POST/inbox/send$0.005Send email from inbox address
POST/subdomain/inbox/messages$0.001List subdomain inbox messages
POST/subdomain/buy$5Purchase a custom email subdomain
POST/subdomain/send$0.005Send email from custom subdomain
POST/inbox/updateNo price listedUpdate inbox settings
POST/inbox/messages/deleteNo price listedDelete an inbox message
POST/send$0.02Send email from relay address
POST/subdomain/inbox/deleteNo price listedDelete inbox from subdomain
POST/inbox/topup$1Extend inbox 30 days
POST/inbox/messages/read$0.001Read a single inbox message
POST/subdomain/signersNo price listedAdd or remove authorized wallet signers
POST/inbox/topup/quarter$2.5Extend inbox 90 days (save 17%)
POST/inbox/messages$0.001List messages in inbox
POST/inbox/cancelNo price listedCancel inbox and get pro-rata refund
POST/inbox/topup/year$8Extend inbox 365 days (save 34%)
GET/subdomain/statusNo price listedCheck DNS/SES verification status
POST/subdomain/inbox/messages/read$0.001Read a subdomain inbox message
POST/subdomain/inbox/listNo price listedList subdomain inboxes
POST/subdomain/inbox/messages/deleteNo price listedDelete a subdomain inbox message
POST/inbox/buy$1Buy a forwarding inbox (30 days)
POST/subdomain/inbox/create$0.25Create inbox on subdomain

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 24 of 24 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/stableemail.dev

Recent checks

30 Sept 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.16 Oct 2026

All 9 checks

When (UTC)	Result	HTTP	Response
16 Oct, 21:16 UTC	No challenge detected	405	91ms
15 Oct, 14:11 UTC	No challenge detected	405	255ms
14 Oct, 05:00 UTC	No challenge detected	405	58ms
12 Oct, 00:34 UTC	No challenge detected	200	100ms
10 Oct, 10:04 UTC	No challenge detected	200	119ms
9 Oct, 03:33 UTC	No challenge detected	200	166ms
7 Oct, 21:31 UTC	No challenge detected	200	71ms
6 Oct, 18:37 UTC	No challenge detected	200	53ms
30 Sept, 17:04 UTC	No challenge detected	200	109ms

Questions

Did our last probe detect a payment challenge?

No. At our last probe on 16 Oct, 21:16 UTC, we detected no payment challenge.

What payment terms does StableEmail advertise?

The listing advertises MPP, x402, Base, Solana, Tempo and USDC. Check the seller's current payment challenge and authentication requirements before paying.

Where is StableEmail listed?

In mppscan, mpp.dev and x402-list.com. Superstables first indexed it on 26 Sept 2026.

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