Built for web and Android.
Public developer API access is not a supported integration path. The official web inbox uses private mailbox credentials. Android requests with Firebase credentials also require app and account verification.
Use the homepage for the web inbox without sign-in. The separate Google account dashboard shows account usage and deletion controls; it does not display mail or issue developer keys.
Android app allowances
These allowances apply to the current Android app. Check the account screen for your current usage. Google sign-in is optional and unlocks the higher allowances below. Each Google account shares one allowance across devices.
| Allowance | Per Google account |
|---|---|
| Active inboxes | 5 |
| New inboxes per day | 20 |
| Mail API requests per day | 1,000 |
| Attachment transfers per day | 50 MiB |
| Incoming messages per day | 100 |
| Incoming mail size per day | 50 MiB |
Messages are limited to 25 MiB raw size, 512 KiB per text or HTML body, and 20 attachments. Individual stored attachments are limited to 15 MiB. Daily allowances reset at midnight UTC. Short burst limits also apply. Logging out, changing an inbox or using another device does not reset an account allowance.
Guest access without Google sign-in
The Android app automatically creates a temporary guest identity: one active inbox, three new inboxes and 300 mail API requests per day, with 10 MiB attachment transfers and 30 incoming messages / 10 MiB incoming mail per day. App verification and burst limits still apply. Optional Google sign-in upgrades the same identity to the account allowances above. Guest usage is counted before and after upgrading; it does not reset on upgrade.
What happens at a limit?
Wait for the displayed reset time or close an unused inbox to free an active inbox slot. Repeated retries do not create more allowance. Messages still expire on schedule. Requests, mailbox creation attempts and attachment transfer attempts may count even if a later step fails.
Open your account dashboard ยท Use the web inbox or get Android
Existing integrations
Old curl examples and API keys are not a supported integration path for the new service. Do not embed mailbox credentials in websites or share them with third-party automation.