Developers
A REST API for mailboxes, mail and domains
Everything the dashboard does, the API does. Scoped keys, predictable JSON, cursor pagination, documented error codes and webhooks with retries.
- HTTPS everywhereSite and API served over TLS
- Owner-scoped accessRow-level security on every table
- Guest inboxes expireSigned-out inboxes last 2 hours
- Sandboxed HTML mailRendered in a restricted iframe
- Built for educationCoursework and QA workflows
- No card requiredCreate an inbox without payment
Twelve endpoints
Mailboxes, emails, domains, notifications, profile and usage — all documented with examples.
Scoped keys
Grant only the scopes a integration needs, set an expiry, and rotate without downtime.
Webhooks with retries
Subscribe to delivery events and inspect every attempt from the developer portal.
SDK snippets
Copy-paste examples for cURL, JavaScript, TypeScript, Python, PHP and Go.
Authentication in one header
Send your key as a bearer token. Keys are hashed at rest, tied to an environment, and every request is logged with its status code and duration so you can debug from the portal.
- Authorization: Bearer iem_live_…
- Per-key rate limits with clear 429 responses
- Optional IP allowlists for server-side integrations
Try before you write code
The developer portal ships an interactive playground: pick an endpoint, edit the request, run it, and copy either the request or the response. Usage charts show requests, errors and latency over time.
Frequently asked questions
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