diff --git a/openapi/components/schemas/FormFileUploadRequest.yaml b/openapi/components/schemas/FormFileUploadRequest.yaml
new file mode 100644
index 0000000..41de628
--- /dev/null
+++ b/openapi/components/schemas/FormFileUploadRequest.yaml
@@ -0,0 +1,6 @@
+type: object
+description: "A file to upload"
+properties:
+  file:
+    type: string
+    format: binary
\ No newline at end of file
diff --git a/openapi/components/schemas/FormFileUploadResponse.yaml b/openapi/components/schemas/FormFileUploadResponse.yaml
new file mode 100644
index 0000000..d0f1789
--- /dev/null
+++ b/openapi/components/schemas/FormFileUploadResponse.yaml
@@ -0,0 +1,16 @@
+type: object
+description: "Form file upload response"
+properties:
+  filename:
+    description: "file name"
+    type: string
+  tempPath:
+    description: "temporary path of a file"
+    type: string
+  contentType:
+    description: "response content type"
+    type: string
+example:
+  filename: "66c5d4e99167e.pdf"
+  tempPath: "885efa7d-c639-4076-ba5d-04a7fbfc1d11.pdf"
+  contentType: "application/pdf"
diff --git a/openapi/openapi.yaml b/openapi/openapi.yaml
index 358600f..c68e529 100644
--- a/openapi/openapi.yaml
+++ b/openapi/openapi.yaml
@@ -119,6 +119,10 @@ x-tagGroups:
   - name: Other
     tags:
       - RestAPIextensions
+
+  - name: Upload
+    tags:
+      - FormFileUpload
 tags:
   - name: Activity
     x-displayName: Activity
@@ -355,6 +359,9 @@ tags:
       REST API extensions can be used to query business data, Bonita Engine APIs, or an external information system (such as a database, web service, LDAP directory...). They also help to keep a clean separation between the front-end (forms, pages, and interfaces visible to users) and the back-end (processes).
     externalDocs:
       url: https://documentation.bonitasoft.com/bonita/latest/rest-api-extensions
+  - name: FormFileUpload
+    x-displayName: Form file upload
+    description: Supports any type of files, used to upload a file before submitting a process or task form with a document in its contract.
 
 paths:
   #  =======================
@@ -673,6 +680,11 @@ paths:
     $ref: './paths/portal@profilesUpload.yaml'
   /services/profile/import:
     $ref: './paths/services@profile@import.yaml'
+  #  =======================
+  #   UPLOAD
+  #  =======================
+  /API/formFileUpload:
+    $ref: './paths/API@formFileUpload.yaml'
 
 # TODO : upload endpoints
 #  /portal/processUpload, supports only .bar files
@@ -681,7 +693,6 @@ paths:
 #  /portal/connectorImplementation, supports only .zip files (not available in Community edition)
 #  /portal/reportUpload, supports any type of file (not available in Community edition)
 #  /portal/resourceUpload, supports only .jar files (not available in Community edition)
-#  /API/formFileUpload, supports any type of files, used to upload a file before submitting a process or task form with a document in its contract
 
 components:
   securitySchemes:
diff --git a/openapi/paths/API@formFileUpload.yaml b/openapi/paths/API@formFileUpload.yaml
new file mode 100644
index 0000000..6acacb6
--- /dev/null
+++ b/openapi/paths/API@formFileUpload.yaml
@@ -0,0 +1,28 @@
+post:
+  tags:
+    - FormFileUpload
+  summary: Upload a file
+  description: |
+    Supports any type of files, used to upload a file before submitting a process or task form with a document in its contract
+
+  operationId: formFileUpload
+  requestBody:
+    content:
+      multipart/form-data:
+        schema:
+          $ref: '../components/schemas/FormFileUploadRequest.yaml'
+  responses:
+    '200':
+      description: "Success"
+      content:
+        text/plain:
+          schema:
+            $ref: '../components/schemas/FormFileUploadResponse.yaml'
+    '401':
+      $ref: '../components/responses/Unauthorized.yaml'
+    '403':
+      $ref: '../components/responses/Forbidden.yaml'
+    '400':
+      $ref: '../components/responses/BadRequest.yaml'
+    '5XX':
+      $ref: '../components/responses/ServerError.yaml'