# Retrieve the Decision Engine

For compatibility with CDN, any web headers (Referrer, User-Agent) will be accepted and passed onto the rule engine.

Endpoint: GET /blaize/decision-engine
Version: 2025-07-30
Security: CookieBlaizeSession, JwtQuery, JwtHeaderXBlaizeJwt, JwtHeaderXZephrJwt, JwtBearer, JwtCookie

## Query parameters:

  - `path` (string, required)
    Uniquely identifies the content Zephr is making a decision about. Request rules can be configured to only execute when the request path matches a provided regular expression.

  - `session` (string, required)
    Zephr Session ID - same as the blaize_session cookie used by the CDN and authentication endpoints.

  - `foreign_id.xxx` (string, required)
    Foreign ID used to identify the user. The foreign system is parsed as the remainder of the parameter key name following 'foreign_id.'

  - `content_id` (string, required)
    Passed as metadata.content_id to the Content API template, used to
perform requests to a 3rd party API for additional content
information used in making a decision.

  - `jwt` (string, required)
    A JSON Web Token, may include identity or product holding claims.

  - `btr` (string, required)
    A trusted referrer token. If Zephr generates a matching token using path, passed-in Referer header and a configured secret, all entitlements used in this decision will be temporarily granted for this request.


## Response 200 fields