diff --git a/.shellcheckrc b/.shellcheckrc
new file mode 100644
index 0000000..1ef75df
--- /dev/null
+++ b/.shellcheckrc
@@ -0,0 +1,8 @@
+# shellcheck configuration
+shell=bash
+enable=all
+severity=warning
+
+# SC2312: Ignore "consider invoking separately to avoid masking return values"
+# (common pattern with command -v in this project)
+disable=SC2312
diff --git a/healthcheck.py b/healthcheck.py
index a4ecafa..e1b9f59 100644
--- a/healthcheck.py
+++ b/healthcheck.py
@@ -1,11 +1,14 @@
 #!/usr/bin/env python3
+import json
 import os
 import sys
-import urllib.request
 import urllib.error
+import urllib.request
 from datetime import datetime, timezone
 from pathlib import Path
 
+PAYLOAD = json.dumps({"name": "Ronaldo Freitas Dias"}).encode()
+
 
 def load_url_from_config():
     config_file = Path.home() / ".config" / "health-monitor"
@@ -16,8 +19,11 @@ def load_url_from_config():
     return None
 
 
+HEADERS = {"User-Agent": "health-monitor/1.0", "Content-Type": "application/json"}
+
+
 def ping(url: str, timeout: int) -> int:
-    req = urllib.request.Request(url, method="GET", headers={"User-Agent": "health-monitor/1.0"})
+    req = urllib.request.Request(url, data=PAYLOAD, method="GET", headers=HEADERS)
     with urllib.request.urlopen(req, timeout=timeout) as response:
         return response.getcode()
 
@@ -25,7 +31,7 @@ def ping(url: str, timeout: int) -> int:
 def ping_fail(url: str, timeout: int) -> None:
     fail_url = url.rstrip("/") + "/fail"
     try:
-        req = urllib.request.Request(fail_url, method="GET", headers={"User-Agent": "health-monitor/1.0"})
+        req = urllib.request.Request(fail_url, data=PAYLOAD, method="GET", headers=HEADERS)
         urllib.request.urlopen(req, timeout=timeout)
     except Exception:
         pass
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..bb1773c
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,20 @@
+[tool.ruff]
+target-version = "py39"
+line-length = 110
+
+[tool.ruff.lint]
+select = [
+    "E",   # pycodestyle errors
+    "W",   # pycodestyle warnings
+    "F",   # pyflakes
+    "I",   # isort
+    "UP",  # pyupgrade
+    "B",   # flake8-bugbear
+    "SIM", # flake8-simplify
+]
+ignore = [
+    "B904", # raise from exc — não obrigatório em scripts simples
+]
+
+[tool.ruff.lint.isort]
+known-first-party = ["healthcheck"]