diff --git a/config/local/mock-services.yml b/config/local/mock-services.yml
index dac99cdec0..542a684df3 100644
--- a/config/local/mock-services.yml
+++ b/config/local/mock-services.yml
@@ -1,5 +1,7 @@
 zosmf:
     timeout: 1800
+    username: testuser
+    password: testpass
 
 server:
     ssl:
diff --git a/gateway-service/src/main/java/org/zowe/apiml/gateway/config/AuthEndpointConfig.java b/gateway-service/src/main/java/org/zowe/apiml/gateway/config/AuthEndpointConfig.java
index 6350b7fb6a..10d3629cae 100644
--- a/gateway-service/src/main/java/org/zowe/apiml/gateway/config/AuthEndpointConfig.java
+++ b/gateway-service/src/main/java/org/zowe/apiml/gateway/config/AuthEndpointConfig.java
@@ -145,7 +145,8 @@ RouterFunction<ServerResponse> routes() {
             .andRoute(path("/gateway/api/v1/auth/keys/public/current"), resendTo("/api/v1/auth/keys/public/current"))
             .andRoute(path("/gateway/api/v1/auth/oidc-token/validate"), resendTo("/api/v1/auth/oidc-token/validate"))
             .andRoute(path("/gateway/api/v1/auth/oidc/webfinger"), resendTo("/api/v1/auth/oidc/webfinger"))
-            .andRoute(path("/gateway/auth/check"), resendTo("/auth/check"));
+            .andRoute(path("/gateway/auth/check"), resendTo("/auth/check"))            
+            .andRoute(path("/gateway/api/v1/auth/delegations/ticket"), resendTo("/api/v1/auth/delegations/ticket"));
     }
 
 }
diff --git a/zaas-service/src/main/java/org/zowe/apiml/zaas/controllers/StsController.java b/zaas-service/src/main/java/org/zowe/apiml/zaas/controllers/StsController.java
new file mode 100644
index 0000000000..8fc4ed566c
--- /dev/null
+++ b/zaas-service/src/main/java/org/zowe/apiml/zaas/controllers/StsController.java
@@ -0,0 +1,113 @@
+/*
+ * This program and the accompanying materials are made available under the terms of the
+ * Eclipse Public License v2.0 which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-v20.html
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Copyright Contributors to the Zowe Project.
+ */
+
+package org.zowe.apiml.zaas.controllers;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.responses.ApiResponses;
+import io.swagger.v3.oas.annotations.security.SecurityRequirement;
+import lombok.Data;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import org.zowe.apiml.passticket.PassTicketService;
+import org.zowe.apiml.zaas.security.mapping.NativeMapperWrapper;
+
+/**
+ * Controller for Security Token Service (STS) operations, similar to AuthController.
+ */
+@RequiredArgsConstructor
+@RestController
+@RequestMapping(StsController.CONTROLLER_PATH)
+@Slf4j
+public class StsController {
+
+    public static final String CONTROLLER_PATH = "/zaas/api/v1/auth/delegations";
+    public static final String ISSUE_PASSTICKET_PATH = "/ticket";
+     
+    private final NativeMapperWrapper nativeMapper;
+    private final PassTicketService passTicketService;
+
+    /**
+     * Public API: Issue a new passticket for the given emailId and applid.
+     */
+    @PostMapping(path = ISSUE_PASSTICKET_PATH)
+    @ResponseBody
+    @Operation(
+        summary = "Generate a passticket for the given emailId and applId.",
+        tags = {"Security"},
+        operationId = "issueDelegatedPassticket",
+        description = "Issues a new passticket for the given emailId, and api authenticated via X509 cert token.",
+        security = {
+            @SecurityRequirement(name = "Bearer")
+        }
+    )
+    @ApiResponses(value = {
+        @ApiResponse(responseCode = "200", description = "PassTicket issued successfully"),
+        @ApiResponse(responseCode = "401", description = "Unauthorized")
+    })
+    public ResponseEntity<PassticketResponse> issuePassticket(@RequestBody PassticketRequest request) {
+        String emailId = request.getEmailId();
+        String applid = request.getApplid();
+        // ...passticket issuing logic using emailId and applid...
+        var uid = getUserId(emailId)
+        if (uid != null ) {
+            return new ResponseEntity<>(null, HttpStatus.Unauthorized);
+        }
+        var ticket = passTicketService.generate(zosUserId, applID);        
+        response.setPassticket(ticket); 
+        response.setUserid(uid);
+        return new ResponseEntity<>(response, HttpStatus.OK);
+    }
+
+    private String getUserId(String emailId) {
+        try {
+            
+            MapperResponse response = nativeMapper.getUserIDForDN(emailId, "registry");
+
+            if (response.getRc() == 0 && StringUtils.isNotEmpty(response.getUserId())) {
+                return response.getUserId();
+            }
+
+            if (response.getRc() != 0) {
+                 logger.warn("Mapping failed for email ID: {} with Return Code: {}", emailId, response.getRc());
+            } else {
+                 logger.warn("Mapping returned empty userId for email ID: {}", emailId);
+            }
+            return null; 
+
+        } catch (Exception exp) {
+            logger.error("Internal error during user ID mapping for email ID: {}", emailId, exp);
+            return null;
+        }
+    }
+
+
+
+    @Data
+    public static class PassticketRequest {
+        private String emailId;
+        private String applid;
+    }
+
+    @Data
+    public static class PassticketResponse {
+        private String passticket;
+        private String userid;
+    }
+
+    @Data
+    public static class ValidateRequestModel {
+        private String token;
+    }
+}
diff --git a/zaas-service/src/main/resources/zaas-api-doc.json b/zaas-service/src/main/resources/zaas-api-doc.json
index 4112e2e8e6..8d316443a0 100644
--- a/zaas-service/src/main/resources/zaas-api-doc.json
+++ b/zaas-service/src/main/resources/zaas-api-doc.json
@@ -223,6 +223,32 @@
                     }
                 }
             }
+        },
+        "/zaas/api/v1/auth/delegations/ticket": {
+            "post": {
+                "tags": ["Security"],
+                "summary": "Generate a passticket for the  given emailId and applId.",
+                "description": "Issues a new passticket for the given emailId, and api authenticated via X509 cert token.",
+                "operationId": "issueDelegatedPassticket",
+                "requestBody": {
+                "content": {
+                    "application/json": {
+                    "schema": {
+                        "type": "object",
+                        "properties": {
+                        "emailId": { "type": "string" },
+                        "applid":{"type":"string"}
+                        }
+                    }
+                    }
+                }
+                },
+                "security": [{ "Bearer": [] }],
+                "responses": {
+                "200": { "description": "PassTicket issued successfully","passticket":"", "userid":"" },
+                "401": { "description": "Unauthorized" }
+                }
+            }
         }
     },
     "servers": [