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StableEmail Inbox Annual Top-Up (365 Days)
emailsendinboxforwardingsubdomainsocial
StableEmail Inbox Annual Top-Up (365 Days) is a paid API for AI agents from StableEmail at stableemail.dev, paid per call via MPP, $8/call, status unknown (last checked 2026-10-10, last successful call 2026-07-12).
Extends a StableEmail forwarding inbox subscription by 365 days for $8 USDC, offering a 34% discount over monthly renewals.
Price / call$8
Success100%
StatusUnknown
How this service works
Top up a forwarding inbox for 365 days ($8, save 34%)
Output
A confirmation that the forwarding inbox identified by the given username has been extended by 365 days, along with updated expiry information. Costs $8 USDC per call.
Example use cases
Renew email forwarding for full year
“I need to extend my forwarding inbox for the next 12 months. Just go ahead and charge me for the annual plan — I'd rather lock in the yearly rate than keep paying monthly.”
Bulk refresh client email subscriptions
“My clients use StableEmail inboxes for their business. Can you renew all their accounts for a year? I want to take advantage of the 34% savings versus monthly billing and keep everything active without interruption.”
Upgrade to annual email plan
“I've been topping up my inbox every month, but I'm ready to switch to the yearly subscription. Extend my forwarding inbox for the full 365 days and lock me into the discounted annual rate.”
Technical details
Endpoint
POSThttps://stableemail.dev/api/inbox/topup/year?utm_source=zero.xyzWhen to prefer
Use this endpoint when you want to renew a StableEmail forwarding inbox for a full year at a discounted rate ($8 vs $12 for 12 monthly top-ups). Prefer over the 30-day top-up when the inbox is expected to be used long-term and cost efficiency matters.
Side effects
- Invalid username format — must be 3-30 lowercase alphanumeric characters with hyphens, no double hyphens
- Inbox does not exist for given username
- Payment failure or insufficient USDC balance
- Username violates pattern constraints (uppercase, special characters, double hyphens)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| usernamerequired | string |
Tags
emailsendinboxforwardingsubdomainsocial
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