Letterbook Docs
Connect mobile apps with the API
Create support conversations from iOS, Android, or in-app help flows.
Last updated June 17, 2026
What this guide covers
Use the API when mobile or in-app support requests should create Letterbook conversations.
Setup steps
- Create conversations from a server-side endpoint
- Attach app version, device, and account metadata
- Avoid exposing API keys in the mobile app
- Link the conversation back to the customer account
- Test rate limits and retries
Security note
The final guide should make clear that API keys belong on your server, not inside distributed mobile clients.