Gmail API

1. Gmail API Overview

   Resources: messages, threads, labels, and drafts.

2. Scopes and Authorization

   Choosing Gmail scopes and OAuth 2.0 verification.

3. Reading and Listing Messages

   Listing, searching, and getting messages and formats.

4. Sending Mail and Drafts

   Sending MIME messages and managing drafts.

5. Threads

   Conversation threads and message ordering.

6. Labels

   System and user labels, modifying messages.

7. Settings and Filters

   Managing filters, forwarding, and settings.

8. Push Notifications

   Pub/Sub watch notifications and renewals.

9. Synchronization

   Full and partial sync with history IDs.

10. Uploading Attachments

    Simple, multipart, and resumable uploads.

11. Usage Limits

    Quota units per method and rate limits.

12. Error Handling

    HTTP error codes and retry strategy.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.