diff --git a/pyproject.toml b/pyproject.toml
index 854f8bd..4ceb57e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,10 +1,11 @@
 [project]
 name = "elexam-core"
-version = "0.1.0"
+version = "0.2.0"
 description = "Общая библиотека платформы Elexam: envelope ответа, trace_id, structlog, каталог ошибок, ULID, http-клиент"
 readme = "README.md"
 requires-python = ">=3.14"
 dependencies = [
+    "httpx>=0.28.1",
     "python-ulid>=3.1.0",
     "starlette>=1.3.1",
     "structlog>=26.1.0",
diff --git a/src/elexam_core/http_client.py b/src/elexam_core/http_client.py
new file mode 100644
index 0000000..175b939
--- /dev/null
+++ b/src/elexam_core/http_client.py
@@ -0,0 +1,17 @@
+import httpx
+
+from elexam_core.context import trace_id_context
+from elexam_core.middleware import TRACE_HEADER
+
+
+async def call_service(
+    method: str,
+    url: str,
+    **kwargs,
+):
+    headers = dict(kwargs.pop("headers", {}))
+    if trace_id := trace_id_context.get():
+        headers[TRACE_HEADER] = trace_id
+
+    async with httpx.AsyncClient() as client:
+        return await client.request(method, url, headers=headers, **kwargs)
\ No newline at end of file
diff --git a/uv.lock b/uv.lock
index 8ab049f..7fa9368 100644
--- a/uv.lock
+++ b/uv.lock
@@ -14,11 +14,21 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/b0/7b/90df4a0a816d98d6ea26f559d87836d494a2cf1fcf063be67df50a7bcc30/anyio-4.14.1-py3-none-any.whl", hash = "sha256:4e5533c5b8ff0a24f5d7a176cbe6877129cd183893f66b537f8f227d10527d72", size = 124875, upload-time = "2026-06-24T20:56:04.413Z" },
 ]
 
+[[package]]
+name = "certifi"
+version = "2026.6.17"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/c9/c7/424b75da314c1045981bd9777432fad05a9e0c69daa4ed7e308bbaffe405/certifi-2026.6.17.tar.gz", hash = "sha256:024c88eeec92ca068db80f02b8b07c9cef7b9fe261d1d535abfd5abd6f6af432", size = 134594, upload-time = "2026-06-17T10:31:07.894Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/ef/2f/c5464532e965badff2f4c4c1a3a83f5697f0d7c407ed0cda44aaa99bb451/certifi-2026.6.17-py3-none-any.whl", hash = "sha256:2227dcbaafe0d2f59279d1762ddddc37783ed4354594f194ffc31d20f41fc3db", size = 133289, upload-time = "2026-06-17T10:31:06.348Z" },
+]
+
 [[package]]
 name = "elexam-core"
 version = "0.1.0"
 source = { editable = "." }
 dependencies = [
+    { name = "httpx" },
     { name = "python-ulid" },
     { name = "starlette" },
     { name = "structlog" },
@@ -27,12 +37,50 @@ dependencies = [
 
 [package.metadata]
 requires-dist = [
+    { name = "httpx", specifier = ">=0.28.1" },
     { name = "python-ulid", specifier = ">=3.1.0" },
     { name = "starlette", specifier = ">=1.3.1" },
     { name = "structlog", specifier = ">=26.1.0" },
     { name = "typing-extensions", specifier = ">=4.15.0" },
 ]
 
+[[package]]
+name = "h11"
+version = "0.16.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/01/ee/02a2c011bdab74c6fb3c75474d40b3052059d95df7e73351460c8588d963/h11-0.16.0.tar.gz", hash = "sha256:4e35b956cf45792e4caa5885e69fba00bdbc6ffafbfa020300e549b208ee5ff1", size = 101250, upload-time = "2025-04-24T03:35:25.427Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/04/4b/29cac41a4d98d144bf5f6d33995617b185d14b22401f75ca86f384e87ff1/h11-0.16.0-py3-none-any.whl", hash = "sha256:63cf8bbe7522de3bf65932fda1d9c2772064ffb3dae62d55932da54b31cb6c86", size = 37515, upload-time = "2025-04-24T03:35:24.344Z" },
+]
+
+[[package]]
+name = "httpcore"
+version = "1.0.9"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "certifi" },
+    { name = "h11" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/06/94/82699a10bca87a5556c9c59b5963f2d039dbd239f25bc2a63907a05a14cb/httpcore-1.0.9.tar.gz", hash = "sha256:6e34463af53fd2ab5d807f399a9b45ea31c3dfa2276f15a2c3f00afff6e176e8", size = 85484, upload-time = "2025-04-24T22:06:22.219Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/7e/f5/f66802a942d491edb555dd61e3a9961140fd64c90bce1eafd741609d334d/httpcore-1.0.9-py3-none-any.whl", hash = "sha256:2d400746a40668fc9dec9810239072b40b4484b640a8c38fd654a024c7a1bf55", size = 78784, upload-time = "2025-04-24T22:06:20.566Z" },
+]
+
+[[package]]
+name = "httpx"
+version = "0.28.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "anyio" },
+    { name = "certifi" },
+    { name = "httpcore" },
+    { name = "idna" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/b1/df/48c586a5fe32a0f01324ee087459e112ebb7224f646c0b5023f5e79e9956/httpx-0.28.1.tar.gz", hash = "sha256:75e98c5f16b0f35b567856f597f06ff2270a374470a5c2392242528e3e3e42fc", size = 141406, upload-time = "2024-12-06T15:37:23.222Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/2a/39/e50c7c3a983047577ee07d2a9e53faf5a69493943ec3f6a384bdc792deb2/httpx-0.28.1-py3-none-any.whl", hash = "sha256:d909fcccc110f8c7faf814ca82a9a4d816bc5a6dbfea25d6591d6985b8ba59ad", size = 73517, upload-time = "2024-12-06T15:37:21.509Z" },
+]
+
 [[package]]
 name = "idna"
 version = "3.18"