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Security and data handling

Transport​

Use HTTPS when calling the API.

API keys​

  • Treat API keys like passwords
  • Never embed them in public client-side code
  • Prefer sending them via X-API-Key header (not query params)

Data handling​

  • Requests are not stored in a database by default
  • Translation results may be cached in Redis for a limited time (see Caching)
  • Server logs may contain error details

EU data residency​

Both Langbly endpoints run in the EU. The global endpoint (api.langbly.com) may process translation requests outside the EU. The dedicated EU endpoint (eu.langbly.com) uses EU-only infrastructure — all processing, storage, and translation stays within the EU.

See EU Data Residency for full details.

Compliance​

If you have specific compliance or retention requirements, contact support@langbly.com.