From 0f4e10c0df08b26e2decfdb649630693f6c34acb Mon Sep 17 00:00:00 2001
From: Kayvan Zahiri <123409429+Kayvan-Zahiri@users.noreply.github.com>
Date: Sun, 18 Oct 2026 21:11:25 -0700
Subject: [PATCH] fix: omit JSON bodies on GET requests

---
 resend/async_request.py        |  7 ++-
 resend/request.py              |  7 ++-
 tests/get_request_body_test.py | 91 ++++++++++++++++++++++++++++++++++
 3 files changed, 101 insertions(+), 4 deletions(-)
 create mode 100644 tests/get_request_body_test.py

diff --git a/resend/async_request.py b/resend/async_request.py
index be17658..2b94247 100644
--- a/resend/async_request.py
+++ b/resend/async_request.py
@@ -91,8 +91,11 @@ def __get_headers(self) -> HeadersType:
     async def make_request(self, url: str) -> Union[Dict[str, Any], List[Any]]:
         headers = self.__get_headers()
 
-        if isinstance(self.params, dict):
-            json_params: Optional[Union[Dict[str, Any], List[Any]]] = {
+        json_params: Optional[Union[Dict[str, Any], List[Any]]]
+        if self.verb == "get":
+            json_params = None
+        elif isinstance(self.params, dict):
+            json_params = {
                 str(k): v for k, v in self.params.items()
             }
         elif isinstance(self.params, list):
diff --git a/resend/request.py b/resend/request.py
index 56d27c1..c4326c8 100644
--- a/resend/request.py
+++ b/resend/request.py
@@ -90,8 +90,11 @@ def __get_headers(self) -> HeadersType:
     def make_request(self, url: str) -> Union[Dict[str, Any], List[Any]]:
         headers = self.__get_headers()
 
-        if isinstance(self.params, dict):
-            json_params: Optional[Union[Dict[str, Any], List[Any]]] = {
+        json_params: Optional[Union[Dict[str, Any], List[Any]]]
+        if self.verb == "get":
+            json_params = None
+        elif isinstance(self.params, dict):
+            json_params = {
                 str(k): v for k, v in self.params.items()
             }
         elif isinstance(self.params, list):
diff --git a/tests/get_request_body_test.py b/tests/get_request_body_test.py
new file mode 100644
index 0000000..47fe6ae
--- /dev/null
+++ b/tests/get_request_body_test.py
@@ -0,0 +1,91 @@
+import json
+
+import httpx
+import pytest
+import requests
+
+import resend
+from resend.http_client_httpx import HTTPXClient
+
+RESPONSE = {"id": "email-1", "object": "list", "data": [], "has_more": False}
+SEND_PARAMS = {
+    "from": "sender@example.test",
+    "to": ["recipient@example.test"],
+    "subject": "Test",
+    "text": "Test content",
+}
+
+
+@pytest.mark.parametrize("operation", ["get", "list", "list_page", "send"])
+def test_sync_email_request_body(monkeypatch, operation):
+    seen = []
+
+    def send(session, request, **kwargs):
+        seen.append(request)
+        response = requests.Response()
+        response.status_code = 200
+        response.headers["Content-Type"] = "application/json"
+        response._content = json.dumps(RESPONSE).encode()
+        return response
+
+    monkeypatch.setattr(requests.Session, "send", send)
+    monkeypatch.setattr(resend, "api_key", "test-key")
+    monkeypatch.setattr(resend, "default_http_client", resend.RequestsClient())
+
+    if operation == "get":
+        result = resend.Emails.get("email-1")
+    elif operation == "list":
+        result = resend.Emails.list()
+    elif operation == "list_page":
+        result = resend.Emails.list({"limit": 5, "after": "cursor-1"})
+    else:
+        result = resend.Emails.send(SEND_PARAMS)
+
+    assert result["id"] == "email-1"
+    request = seen[0]
+    assert request.headers["Authorization"] == "Bearer test-key"
+    if operation == "send":
+        assert json.loads(request.body) == SEND_PARAMS
+    else:
+        assert request.body is None
+        assert "Content-Type" not in request.headers
+    if operation == "list_page":
+        assert request.url.endswith("/emails?limit=5&after=cursor-1")
+
+
+@pytest.mark.parametrize("operation", ["get", "list", "list_page", "send"])
+async def test_async_email_request_body(monkeypatch, operation):
+    seen = []
+
+    def respond(request):
+        seen.append(request)
+        return httpx.Response(200, json=RESPONSE)
+
+    original_client = httpx.AsyncClient
+
+    def client_factory(**kwargs):
+        return original_client(transport=httpx.MockTransport(respond), **kwargs)
+
+    monkeypatch.setattr(httpx, "AsyncClient", client_factory)
+    monkeypatch.setattr(resend, "api_key", "test-key")
+    monkeypatch.setattr(resend, "default_async_http_client", HTTPXClient())
+
+    if operation == "get":
+        result = await resend.Emails.get_async("email-1")
+    elif operation == "list":
+        result = await resend.Emails.list_async()
+    elif operation == "list_page":
+        result = await resend.Emails.list_async({"limit": 5, "after": "cursor-1"})
+    else:
+        result = await resend.Emails.send_async(SEND_PARAMS)
+
+    assert result["id"] == "email-1"
+    request = seen[0]
+    assert request.headers["Authorization"] == "Bearer test-key"
+    if operation == "send":
+        assert json.loads(request.content) == SEND_PARAMS
+    else:
+        assert request.content == b""
+        assert "Content-Type" not in request.headers
+    if operation == "list_page":
+        assert str(request.url).endswith("/emails?limit=5&after=cursor-1")