StableEmail List Inbox Messages

Use this endpoint when you need to programmatically list or poll messages in a StableEmail inbox without needing to read full message content. Prefer this over the Read endpoint when you only need a summary list of messages rather than full body/attachments of a specific message. Ideal for monitoring, building inbox dashboards, or selecting which messages to read next.

• Invalid username format (must match pattern ^[a-z0-9][a-z0-9-]{1,28}[a-z0-9]$ with no consecutive hyphens) returns validation error
• Username does not exist or has expired inbox returns not found error
• Invalid cursor token returns pagination error
• Limit out of range (must be 1–100) returns validation error
• Insufficient payment balance returns 402 Payment Required
• Network timeout returns 5xx error