diff --git a/src/openapi/service/service-crud.yaml b/src/openapi/service/service-crud.yaml
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+++ b/src/openapi/service/service-crud.yaml
@@ -0,0 +1,159 @@
+openapi: "3.0.3"
+info:
+  title: ABT Service CRUD APIs
+  version: "1.0"
+  description: CRUD APIs for ABT Service processes.
+servers:
+  - url: https://api.integratielaag.nl/v1/service
+paths:
+  /tokenregisterrequests:
+    get:
+      summary: Get all token register requests.
+      description: Get all token register requests.
+      tags:
+        - NFC Reader
+      parameters:
+        - in: query
+          name: readerId
+          schema:
+            type: string
+            example: b14b0320-2b72-48bb-990b-b97a2d67f9df
+          explode: false
+          required: false
+          description: Filter on possible NFC reader ids.
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/TokenRegisterRequestsGetResponse"
+              examples:
+                Single TokenRegisterRequest:
+                  summary: Single TokenRegisterRequest
+                  value:
+                    {
+                      "tokenRegisterRequests":
+                        [
+                          {
+                            "readerId": "b14b0320-2b72-48bb-990b-b97a2d67f9df",
+                            "xBot": "4bfaede2-a6c9-45dd-8a80-1f83a075a115",
+                            "updated": "2025-07-02 15:01:00.000",
+                          },
+                        ],
+                    }
+                Multiple TokenRegisterRequests:
+                  summary: Multiple TokenRegisterRequests
+                  value:
+                    {
+                      "tokenRegisterRequests":
+                        [
+                          {
+                            "readerId": "b14b0320-2b72-48bb-990b-b97a2d67f9df",
+                            "xBot": "4bfaede2-a6c9-45dd-8a80-1f83a075a115",
+                            "updated": "2025-07-02 15:01:00.000",
+                          },
+                          {
+                            "readerId": "b4d8e43c-be21-472c-955b-a0c7c11b4bfb",
+                            "xBot": "625bc66b-a5de-42fc-ba9e-fb02ada4a4ee",
+                            "updated": "2025-07-02 13:37:07.000",
+                          },
+                        ],
+                    }
+  /tokenregisterrequests/{readerId}:
+    parameters:
+      - in: path
+        name: readerId
+        required: true
+        description: The NFC reader id.
+        schema:
+          type: string
+          example: b14b0320-2b72-48bb-990b-b97a2d67f9df
+    put:
+      summary: Insert or update token register request.
+      description: Insert or update token register request.
+      tags:
+        - NFC Reader
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/TokenRegisterRequestPutRequest"
+            example: { "xBot": "4bfaede2-a6c9-45dd-8a80-1f83a075a115" }
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/TokenRegisterRequestPutResponse"
+              example:
+                {
+                  "readerId": "b14b0320-2b72-48bb-990b-b97a2d67f9df",
+                  "xBot": "4bfaede2-a6c9-45dd-8a80-1f83a075a115",
+                  "updated": "2025-07-02 15:01:00.000",
+                }
+        "201":
+          description: Created
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/TokenRegisterRequestPutResponse"
+              example:
+                {
+                  "readerId": "b14b0320-2b72-48bb-990b-b97a2d67f9df",
+                  "xBot": "4bfaede2-a6c9-45dd-8a80-1f83a075a115",
+                  "updated": "2025-07-02 15:01:00.000",
+                }
+components:
+  securitySchemes:
+    bearerToken:
+      type: http
+      scheme: bearer
+      bearerFormat: JWT
+  schemas:
+    TokenRegisterRequestsGetResponse:
+      type: object
+      properties:
+        tokenRegisterRequests:
+          type: array
+          items:
+            $ref: "#/components/schemas/TokenRegisterRequest"
+    TokenRegisterRequestPutRequest:
+      type: object
+      properties:
+        xBot:
+          type: string
+          format: uuid
+          example: 4bfaede2-a6c9-45dd-8a80-1f83a075a115
+          nullable: false
+          description: The xBOT id.
+      required:
+        - xBot
+    TokenRegisterRequestPutResponse:
+        $ref: "#/components/schemas/TokenRegisterRequest"
+    TokenRegisterRequest:
+      type: object
+      properties:
+        readerId:
+          type: string
+          example: b14b0320-2b72-48bb-990b-b97a2d67f9df
+          nullable: false
+          description: The NFC reader id.
+        xBot:
+          type: string
+          format: uuid
+          example: 4bfaede2-a6c9-45dd-8a80-1f83a075a115
+          nullable: false
+          description: The xBOT id.
+        updated:
+          type: string
+          format: date-time
+          example: "2025-07-02T15:01:00Z"
+          nullable: false
+          description: The date and time when the token register request was updated.
+      required:
+        - readerId
+        - xBot
+        - updated