E17002 — MailboxHandleTaken
That handle is already taken.
- HTTP status: 409
- Type: conflict_error
- Name: MailboxHandleTaken
What to do
Handles are first come, first served, and stay reserved once claimed. Pick a different one for your mailbox.
Related
- Idempotency: safe retries and key reuse rules
- E17xxx — Agent mailboxes: every code in this range
- Errors: the full wire contract, status mapping, and error catalog
- Error handling: branching on type and code, validation details, and vendor_code