diff --git a/README.md b/README.md
index ef11095..89c24d0 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,8 @@ Note that this service is not limited to 1C and can be utilized in other context
 
 Current API version is 1.2. See Swagger OpenAPI 3.0 specification in src/docs/api
 
+![API overview](src/docs/api/swagger.png)
+
 ## How to compile
 
 Current version is 1.2.1. Execute in the command line:
diff --git a/src/docs/api/swagger.png b/src/docs/api/swagger.png
new file mode 100644
index 0000000..6486545
Binary files /dev/null and b/src/docs/api/swagger.png differ
diff --git a/src/docs/api/swagger_openapi.yml b/src/docs/api/swagger_openapi.yml
index faa8521..28cc7cc 100644
--- a/src/docs/api/swagger_openapi.yml
+++ b/src/docs/api/swagger_openapi.yml
@@ -136,13 +136,6 @@ paths:
           description: SQL connection id as GUID in a plain text, must be obtained by /connection POST method.
           required: true
           example: "52f0b434-4eae-4cc6-803c-2d2f604fe16c"
-        - in: header
-          name: SQL-Statement
-          schema:
-            type: string
-          description: SQL statement (url-encoded).
-          required: true
-          example: "DELETE FROM SALES WHERE id = 783"
       requestBody:
         description: SQL query text.
         required: true