diff --git a/maigret/checking.py b/maigret/checking.py
index 07c9ae1..711f572 100644
--- a/maigret/checking.py
+++ b/maigret/checking.py
@@ -63,28 +63,39 @@ class SimpleAiohttpChecker(CheckerBase):
         self.timeout = 0
         self.method = 'get'
 
-    def prepare(self, url, headers=None, allow_redirects=True, timeout=0, method='get'):
+    def prepare(self, url, headers=None, allow_redirects=True, timeout=0, method='get', json_body=None):
         self.url = url
         self.headers = headers
         self.allow_redirects = allow_redirects
         self.timeout = timeout
         self.method = method
+        self.json_body = json_body
         return None
 
     async def close(self):
         pass
 
     async def _make_request(
-        self, session, url, headers, allow_redirects, timeout, method, logger
+        self, session, url, headers, allow_redirects, timeout, method, logger, json_body=None
     ) -> Tuple[str, int, Optional[CheckError]]:
         try:
-            request_method = session.get if method == 'get' else session.head
-            async with request_method(
+            if method == 'post':
+                request_method = session.post
+            elif method == 'head':
+                request_method = session.head
+            else:
+                request_method = session.get
+
+            kwargs = dict(
                 url=url,
                 headers=headers,
                 allow_redirects=allow_redirects,
                 timeout=timeout,
-            ) as response:
+            )
+            if method == 'post' and json_body is not None:
+                kwargs['json'] = json_body
+
+            async with request_method(**kwargs) as response:
                 status_code = response.status
                 response_content = await response.content.read()
                 charset = response.charset or "utf-8"
@@ -141,6 +152,7 @@ class SimpleAiohttpChecker(CheckerBase):
                 self.timeout,
                 self.method,
                 self.logger,
+                json_body=getattr(self, 'json_body', None),
             )
 
             if error and str(error) == "Invalid proxy response":
@@ -165,7 +177,7 @@ class AiodnsDomainResolver(CheckerBase):
         self.logger = kwargs.get('logger', Mock())
         self.resolver = aiodns.DNSResolver(loop=loop)
 
-    def prepare(self, url, headers=None, allow_redirects=True, timeout=0, method='get'):
+    def prepare(self, url, headers=None, allow_redirects=True, timeout=0, method='get', json_body=None):
         self.url = url
         return None
 
@@ -494,7 +506,10 @@ def make_site_result(
         for k, v in site.get_params.items():
             url_probe += f"&{k}={v}"
 
-        if site.check_type == "status_code" and site.request_head_only:
+        if site.request_method and site.request_method.lower() == 'post':
+            # Site explicitly requests POST method
+            request_method = 'post'
+        elif site.check_type == "status_code" and site.request_head_only:
             # In most cases when we are detecting by status code,
             # it is not necessary to get the entire body:  we can
             # detect fine with just the HEAD response.
@@ -505,6 +520,14 @@ def make_site_result(
             # not respond properly unless we request the whole page.
             request_method = 'get'
 
+        # Build JSON payload for POST requests by substituting {username}
+        json_body = None
+        if request_method == 'post' and site.request_payload:
+            import json as json_module
+            payload_str = json_module.dumps(site.request_payload)
+            payload_str = payload_str.replace('{username}', username)
+            json_body = json_module.loads(payload_str)
+
         if site.check_type == "response_url":
             # Site forwards request to a different URL if username not
             # found.  Disallow the redirect so we can capture the
@@ -521,6 +544,7 @@ def make_site_result(
             headers=headers,
             allow_redirects=allow_redirects,
             timeout=options['timeout'],
+            json_body=json_body,
         )
 
         # Store future request object in the results object
@@ -577,6 +601,7 @@ async def check_site_for_username(
                     allow_redirects=checker.allow_redirects,
                     timeout=checker.timeout,
                     method=checker.method,
+                    json_body=getattr(checker, 'json_body', None),
                 )
                 response = await checker.check()
 
diff --git a/maigret/resources/data.json b/maigret/resources/data.json
index 40e9830..48bd1fe 100644
--- a/maigret/resources/data.json
+++ b/maigret/resources/data.json
@@ -17676,24 +17676,31 @@
             "usernameUnclaimed": "smbepezbrg"
         },
         "Virgool": {
-            "disabled": true,
             "tags": [
                 "blog",
                 "ir"
             ],
             "checkType": "message",
             "presenseStrs": [
-                "\"bio\""
+                "\"user_exist\":true",
+                "\"user_exist\": true"
             ],
             "absenceStrs": [
-                "\u06f4\u06f0\u06f4"
+                "\u06a9\u0627\u0631\u0628\u0631\u06cc \u0628\u0627 \u0627\u06cc\u0646 \u0645\u0634\u062e\u0635\u0627\u062a \u06cc\u0627\u0641\u062a \u0646\u0634\u062f"
             ],
-            "errors": {
-                "<noscript>": "JS-generated cookies required"
-            },
             "alexaRank": 1457,
             "urlMain": "https://virgool.io/",
             "url": "https://virgool.io/@{username}",
+            "urlProbe": "https://virgool.io/api/v1.4/auth/user-existence",
+            "requestMethod": "post",
+            "requestPayload": {
+                "username": "{username}",
+                "type": "login",
+                "method": "username"
+            },
+            "headers": {
+                "Content-Type": "application/json"
+            },
             "usernameClaimed": "blue",
             "usernameUnclaimed": "noonewouldeverusethis7"
         },
diff --git a/maigret/sites.py b/maigret/sites.py
index db6bf76..506ffe4 100644
--- a/maigret/sites.py
+++ b/maigret/sites.py
@@ -67,6 +67,10 @@ class MaigretSite:
     check_type = ""
     # Whether to only send HEAD requests (GET by default)
     request_head_only = ""
+    # HTTP method override ("post" to use POST requests)
+    request_method = ""
+    # JSON payload template for POST requests (supports {username} placeholder)
+    request_payload: Dict[str, Any] = {}
     # GET parameters to include in requests
     get_params: Dict[str, Any] = {}
 
@@ -138,6 +142,8 @@ class MaigretSite:
                 'url_probe',
                 'check_type',
                 'request_head_only',
+                'request_method',
+                'request_payload',
                 'get_params',
                 'presense_strs',
                 'absence_strs',
diff --git a/tests/local.json b/tests/local.json
index 48193db..849a707 100644
--- a/tests/local.json
+++ b/tests/local.json
@@ -16,6 +16,21 @@
             "absenseStrs": ["not found", "404"],
             "usernameClaimed": "claimed",
             "usernameUnclaimed": "unclaimed"
+        },
+        "PostMessage": {
+            "checkType": "message",
+            "url": "http://localhost:8989/profile?id={username}",
+            "urlMain": "http://localhost:8989/",
+            "urlProbe": "http://localhost:8989/api/check",
+            "requestMethod": "post",
+            "requestPayload": {
+                "username": "{username}",
+                "type": "lookup"
+            },
+            "presenseStrs": ["\"exists\":true", "\"exists\": true"],
+            "absenseStrs": ["not found"],
+            "usernameClaimed": "claimed",
+            "usernameUnclaimed": "unclaimed"
         }
     }
 }
\ No newline at end of file
diff --git a/tests/test_checking.py b/tests/test_checking.py
index 98a354f..f3668ad 100644
--- a/tests/test_checking.py
+++ b/tests/test_checking.py
@@ -67,3 +67,35 @@ async def test_checking_by_message_negative(httpserver, local_test_db):
 
     result = await search('unclaimed', site_dict=sites_dict, logger=Mock())
     assert result['Message']['status'].is_found() is True
+
+
+@pytest.mark.slow
+@pytest.mark.asyncio
+async def test_checking_by_post_message(httpserver, local_test_db):
+    sites_dict = local_test_db.sites_dict
+
+    import json
+
+    # Existing user: API responds with {"exists": true}
+    httpserver.expect_request(
+        '/api/check',
+        method='POST',
+        json={"username": "claimed", "type": "lookup"},
+    ).respond_with_data(
+        json.dumps({"exists": True}), content_type="application/json"
+    )
+
+    # Non-existing user: API responds with {"msg": "not found"}
+    httpserver.expect_request(
+        '/api/check',
+        method='POST',
+        json={"username": "unclaimed", "type": "lookup"},
+    ).respond_with_data(
+        json.dumps({"msg": "not found"}), content_type="application/json"
+    )
+
+    result = await search('claimed', site_dict=sites_dict, logger=Mock())
+    assert result['PostMessage']['status'].is_found() is True
+
+    result = await search('unclaimed', site_dict=sites_dict, logger=Mock())
+    assert result['PostMessage']['status'].is_found() is False