diff --git a/src/main/resources/interface-specification.yml b/src/main/resources/interface-specification.yml
index 308db5a..7e2e80d 100644
--- a/src/main/resources/interface-specification.yml
+++ b/src/main/resources/interface-specification.yml
@@ -1098,6 +1098,7 @@ components:
         - description
         - technology
         - mode
+        - descriptor
       properties:
         name:
           type: string
@@ -1110,7 +1111,9 @@ components:
         technology:
           $ref: '#/components/schemas/EServiceTechnology'
         mode:
-          $ref: '#/components/schemas/EServiceMode'  
+          $ref: '#/components/schemas/EServiceMode'
+    descriptor:
+      $ref: "#/components/schemas/DescriptorSeedForEServiceCreation"
     UpdateEServiceSeed:
       type: object
       required:
@@ -1130,7 +1133,43 @@ components:
         technology:
           $ref: '#/components/schemas/EServiceTechnology'
         mode:
-          $ref: '#/components/schemas/EServiceMode'  
+          $ref: '#/components/schemas/EServiceMode'
+    DescriptorSeedForEServiceCreation:
+      required:
+        - audience
+        - voucherLifespan
+        - dailyCallsPerConsumer
+        - dailyCallsTotal
+        - agreementApprovalPolicy
+      type: object
+      properties:
+        description:
+          type: string
+          minLength: 10
+          maxLength: 250
+        audience:
+          type: array
+          items:
+            type: string
+            minLength: 1
+            maxLength: 250
+        voucherLifespan:
+          type: integer
+          format: int32
+          minimum: 60
+          maximum: 86400
+        dailyCallsPerConsumer:
+          description: "maximum number of daily calls that this descriptor can afford."
+          type: integer
+          format: int32
+          minimum: 1
+        dailyCallsTotal:
+          description: "total daily calls available for this e-service."
+          type: integer
+          format: int32
+          minimum: 1
+        agreementApprovalPolicy:
+          $ref: "#/components/schemas/AgreementApprovalPolicy"
     EServiceDescriptorSeed:
       required:
         - audience
@@ -1139,6 +1178,7 @@ components:
         - dailyCallsTotal
         - agreementApprovalPolicy
         - attributes
+        - docs
       type: object
       properties:
         description:
@@ -1170,6 +1210,10 @@ components:
           $ref: '#/components/schemas/AgreementApprovalPolicy'
         attributes:
           $ref: '#/components/schemas/AttributesSeed'
+        docs:
+          type: array
+          items:
+            $ref: "#/components/schemas/CreateEServiceDescriptorDocumentSeed"
     UpdateEServiceDescriptorSeed:
       required:
         - audience
@@ -1513,6 +1557,7 @@ components:
         - contentType
         - prettyName
         - path
+        - checksum
       properties:
         id:
           type: string
@@ -1525,6 +1570,8 @@ components:
           type: string
         path:
           type: string
+        checksum:
+          type: string
     EServiceDescriptor:
       type: object
       required: