Based on the OPAL documentation, there are several ways to handle data updates without exposing sensitive credentials publicly. For publishing data updates, you should use the OPAL client CLI to push updates rather than directly accessing OPA endpoints (1) . The proper way to trigger updates is:

opal-client publish-data-update --src-url <https://api.country.is/23.54.6.78> -t policy_data --dst-path /users/bob/location

This publishes updates through OPAL's pub/sub system without exposing the data directly . For sensitive data configuration, you can use the

OPAL_DATA_CONFIG_SOURCES

environment variable with authentication headers (2) (3) :

{
  "config": {
    "entries": [
      {
        "url": "<http://host.docker.internal:8000/permissions.json>",
        "topics": [
          "permissions"
        ],
        "dst_path": "/course_permissions"
      }
    ]
  }
}

(4) If you need to include authentication for secure data sources, you can add headers to the configuration (3) :

"config": {"headers": {"Authorization": "Bearer glpat-tx5AxRcPgT1VKt37HPrz"}}

OPAL sends instructions to clients on how to fetch data directly rather than sending the data itself through the pub/sub channel (4) . This approach maintains security while enabling real-time updates. For your specific concern about blocking data updates with

system.rego

, the recommended approach is to use OPAL's built-in data update mechanisms rather than directly posting to OPA endpoints, as this maintains both security and real-time update capabilities (1) (4) .

To learn more, see the sources I considered: [[1] Step 4: Publishing a data update via the OPAL Server](https://docs.opal.ac/getting-started/quickstart/opal-playground/publishing-data-update) [[2] OPAL Configuration Guide | OPAL](https://docs.opal.ac/getting-started/configuration) [[3] OPAL Client Redirected to GitLab Sign-In Page Despite Access Token in OPAL_DATA_CONFIG_SOURCES](https://github.com/permitio/opal/discussions/609) [[4] Data updates](https://docs.opal.ac/faq/)

When configuring

OPAL_INLINE_OPA_CONFIG

with authorization settings, the configuration needs to be properly formatted as a JSON object (1) . The

OPAL_INLINE_OPA_CONFIG

setting controls how OPA starts when running inline with OPAL, and the default value is

{}

. This configuration affects the server options that are passed to

opa run --server

. If the client isn't starting successfully with authorization settings, ensure: 1. The JSON is properly escaped and formatted 2. The configuration matches OPA's expected server configuration format For authentication between OPAL client and the policy store (OPA) , you should use

OPAL_POLICY_STORE_AUTH_TYPE

instead, which supports options:

none

,

oauth

,

token

. If using token authentication, set

OPAL_POLICY_STORE_AUTH_TOKEN

with the bearer token . Additionally, if you're having startup issues with your configuration, please share: 1. Which Workspace / Project / Env you are using 2. What calls you are performing (as SDK code or CURL) 3. Which PDP version you are running 4. Relevant logs from your PDP This will help our engineers investigate the specific issue you're encountering.

To learn more, see the sources I considered: [[1] OPAL Configuration Guide | OPAL](https://docs.opal.ac/getting-started/configuration)