> ## Documentation Index
> Fetch the complete documentation index at: https://arizeai-433a7140.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# 04.28.2025: TLS support for Phoenix server

> Available in Phoenix 8.29+

<Update label="04.28.2025">
  ## TLS Support For Phoenix Server

  Phoenix now supports Transport Layer Security (TLS) for both HTTP and gRPC connections, enabling encrypted communication and optional mutual TLS (mTLS) authentication. This enhancement provides a more secure foundation for production deployments.

  ### **Highlights:**

  * **Secure HTTP & gRPC Connections:** Phoenix can now serve over HTTPS and secure gRPC.
  * **Flexible TLS Configuration:** TLS settings are managed via environment variables.
  * **Optional Client Verification:** Support for mTLS with configurable client certificate validation.
  * **Improved Testing:** TLS-aware infrastructure added to integration tests.
  * **Better Visibility:** Server startup logs now display TLS status.

  ### **Configuration Options**

  Set the following environment variables to enable and customize TLS:

  | Variable                        | Type    | Description                                      |
  | ------------------------------- | ------- | ------------------------------------------------ |
  | `PHOENIX_TLS_ENABLED`           | boolean | Enable or disable TLS (`true`/`false`)           |
  | `PHOENIX_TLS_CERT_FILE`         | string  | Path to TLS certificate file                     |
  | `PHOENIX_TLS_KEY_FILE`          | string  | Path to private key file                         |
  | `PHOENIX_TLS_KEY_FILE_PASSWORD` | string  | Password for encrypted private key file          |
  | `PHOENIX_TLS_CA_FILE`           | string  | Path to CA certificate (for client verification) |
  | `PHOENIX_TLS_VERIFY_CLIENT`     | boolean | Enable client cert verification                  |

  <Info>
    **Note:** Encrypted private keys require the `cryptography` Python package for decryption.
  </Info>

  <Card title="feat: environment variables for TLS by RogerHYang · Pull Request #7296 · Arize-ai/phoenix" icon="github" href="https://github.com/Arize-ai/phoenix/pull/7296" horizontal>
    GitHub
  </Card>
</Update>