Azure Ad

Acquires an Entra ID bearer token via the client-credentials grant and injects “Authorization: Bearer " on every proxied request to Azure OpenAI

Category: Setup-dependent integration
Task: Acquires an Entra ID bearer token via the client-credentials grant and injects “Authorization: Bearer " on every proxied request to Azure OpenAI

Prerequisites: The external service, credentials, or certificates referenced by this configuration.

Run it: Use ghcr.io/praxis-proxy/ai:0.4.1 and follow the container quickstart to mount and start the configuration.

This configuration comes from the selected release. The example has not been run here; external services are not bundled.

Download the source file.

# Azure AD (Entra ID) upstream authentication
#
# Acquires an Entra ID bearer token via the client-credentials grant
# and injects "Authorization: Bearer <token>" on every proxied
# request to Azure OpenAI. The token is cached in memory (cache-through:
# a request that finds the cache stale fetches a fresh token inline
# before proceeding); the downstream client never sees Entra ID.
#
# This filter only injects the Authorization header — it does NOT
# manage the upstream Host. Point the backend cluster at your Azure
# OpenAI endpoint (and set tls.sni) the same way you would for any
# other upstream. In this example the cluster points at a local test
# double (127.0.0.1:3000); in production use, e.g.,
# mycompany.openai.azure.com:443 with TLS enabled.
#
# Required environment variables:
#   AZURE_CLIENT_SECRET

listeners:
  - name: gateway
    address: "0.0.0.0:8080"
    filter_chains:
      - azure-openai

filter_chains:
  - name: azure-openai
    filters:
      - filter: router
        routes:
          - path_prefix: "/openai/"
            cluster: azure-openai
      - filter: load_balancer
        clusters:
          - name: azure-openai
            endpoints:
              - "127.0.0.1:3000"
      - filter: azure_ad
        tenant_id: 00000000-0000-0000-0000-000000000000
        client_id: 11111111-1111-1111-1111-111111111111
        scope: https://cognitiveservices.azure.com/.default
        client_secret_env_var: AZURE_CLIENT_SECRET
        # authority_host: login.microsoftonline.com  # optional, for sovereign clouds
        # allow_private_authority: false  # opt in only for a trusted private authority

insecure_options:
  allow_private_endpoints: true # example proxies to a local backend