rename env variable for OBP consumer key

Author: nemozak1

.env.example

@@ -37,6 +37,9 @@ OBP_OIDC_ISSUER_URL=http://localhost:9000/obp-oidc
 #   - "none":   No authorization method is used. OBP-API calls are made but with limited access (only public endpoints).
 OBP_AUTHORIZATION_VIA="none" # Options: "oauth", "consent", "none"
 
+# OBP API consumer key that opey uses (required for "consent" authorization method with opey)
+OPEY_OPEY_OBP_CONSUMER_KEY="obp-opey-ii-client"
+
 # Multi-issuer bearer-only mode:
 # Set BOTH KEYCLOAK_REALM_URL and OBP_OIDC_ISSUER_URL with AUTH_PROVIDER=bearer-only
 # to accept tokens from either identity provider. The server will route validation

src/mcp_server_obp/server.py

@@ -234,6 +234,13 @@ async def call_obp_api(
                                    f"Please approve and provide a Consent-JWT.",
                     }, indent=2)
                 request_headers["Consent-JWT"] = consent_jwt
+                
+                consumer_key = os.getenv("OPEY_OBP_CONSUMER_KEY")
+                if consumer_key:
+                    request_headers["Consumer-Key"] = consumer_key
+                else:
+                    logger.warning("OPEY_OBP_CONSUMER_KEY is not set in environment variables. Consent-based authorization will fail without it.")
+                    
             case "none":
                 # No authorization
                 logger.info("No authorization method used for OBP API call")