For developers

Website email and OAuth mailbox integrations.

Choose the right integration

Two separate paths: send website email or read an owner-authorized mailbox.

Prepare a domain and project, then try cURL, JavaScript, Python or PHP.

Fields, limits, authentication and status lookup.

Understand accepted and unknown while avoiding duplicate sends and charges.

Self-service registration with exact callbacks and a server-held secret.

Implement Authorization Code from the first redirect to an access token.

Read endpoints and mailbox, folder and UID boundaries.

Implement token lifecycle and stop access when consent is revoked.

Read the HTTP status and error code before retrying.

Create a project, send one order event, and test status and retries.

A dependency-free Node.js project with isolated tests and bilingual instructions.