Once Email official documentation · v1

SDK and CLI

SDK and CLI: Authoritative product and developer guidance for receiving temporary email, troubleshooting delivery, and testing authorized email flows safely.

Reviewed 15 August 2026

What you can do

SDK and CLI: Authoritative product and developer guidance for receiving temporary email, troubleshooting delivery, and testing authorized email flows safely. TypeScript and Python artifacts are private candidates generated from one reviewed OpenAPI contract; they are not yet public npm or PyPI downloads. Verify the current page version and follow the linked next step; never infer a capability from a screenshot, old article, or package name.

Failures and recovery

SDK and CLI: Authoritative product and developer guidance for receiving temporary email, troubleshooting delivery, and testing authorized email flows safely. The CLI contract is the same on Windows, Linux, and macOS: doctor, plan, run, cleanup, stable exit codes, one deadline, and redacted JSON/JUnit. Verify the current page version and follow the linked next step; never infer a capability from a screenshot, old article, or package name.

Security and limits

SDK and CLI: Authoritative product and developer guidance for receiving temporary email, troubleshooting delivery, and testing authorized email flows safely. Keep keys in a secrets manager or injected environment source; never place addresses, OTPs, links, message content, or keys in arguments, reports, Git, or CI artifacts. Verify the current page version and follow the linked next step; never infer a capability from a screenshot, old article, or package name.