diff --git a/adapters/hermes/pyproject.toml b/adapters/hermes/pyproject.toml
index a48a1e6a4..95f1cf670 100644
--- a/adapters/hermes/pyproject.toml
+++ b/adapters/hermes/pyproject.toml
@@ -32,13 +32,13 @@ dependencies = [
 
 [project.optional-dependencies]
 harness = [
-  "hermes-agent[mcp]>=0.19.0; python_version < '3.14'",
+  "hermes-agent>=0.19.0; python_version < '3.14'",
 ]
 relay = [
   "nemo-relay>=0.7.2,<0.8",
 ]
 full = [
-  "hermes-agent[mcp]>=0.19.0; python_version < '3.14'",
+  "hermes-agent>=0.19.0; python_version < '3.14'",
   "nemo-relay>=0.7.2,<0.8",
 ]
 
diff --git a/adapters/hermes/uv.lock b/adapters/hermes/uv.lock
index eba811969..f6f236292 100644
--- a/adapters/hermes/uv.lock
+++ b/adapters/hermes/uv.lock
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-
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 name = "certifi"
 version = "2026.5.20"
@@ -327,12 +318,6 @@ wheels = [
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 ]
 
-[package.optional-dependencies]
-mcp = [
-    { name = "mcp" },
-    { name = "starlette" },
-]
-
 [[package]]
 name = "httpcore"
 version = "1.0.9"
@@ -395,15 +380,6 @@ socks = [
     { name = "socksio" },
 ]
 
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 version = "3.10.2"
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-    { name = "httpx" },
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-    { name = "jsonschema" },
-    { name = "pydantic" },
-    { name = "pydantic-settings" },
-    { name = "pyjwt", extra = ["crypto"] },
-    { name = "python-multipart" },
-    { name = "pywin32", marker = "sys_platform == 'win32'" },
-    { name = "sse-starlette" },
-    { name = "starlette" },
-    { name = "typing-extensions" },
-    { name = "typing-inspection" },
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 [[package]]
 name = "mdurl"
 version = "0.1.2"
@@ -642,11 +566,11 @@ dependencies = [
 
 [package.optional-dependencies]
 full = [
-    { name = "hermes-agent", extra = ["mcp"] },
+    { name = "hermes-agent" },
     { name = "nemo-relay" },
 ]
 harness = [
-    { name = "hermes-agent", extra = ["mcp"] },
+    { name = "hermes-agent" },
 ]
 relay = [
     { name = "nemo-relay" },
@@ -654,8 +578,8 @@ relay = [
 
 [package.metadata]
 requires-dist = [
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-    { name = "hermes-agent", extras = ["mcp"], marker = "python_full_version < '3.14' and extra == 'harness'", specifier = ">=0.19.0" },
+    { name = "hermes-agent", marker = "python_full_version < '3.14' and extra == 'full'", specifier = ">=0.19.0" },
+    { name = "hermes-agent", marker = "python_full_version < '3.14' and extra == 'harness'", specifier = ">=0.19.0" },
     { name = "nemo-fabric-adapter-contract", editable = "../../adapter-contract" },
     { name = "nemo-fabric-adapters-common", editable = "../common" },
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@@ -782,7 +706,7 @@ name = "portalocker"
 version = "3.2.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "pywin32" },
+    { name = "pywin32", marker = "sys_platform == 'win32'" },
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@@ -928,20 +852,6 @@ wheels = [
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-    { url = "https://files.pythonhosted.org/packages/dd/3a/764912c58293d95b6dcdf4cc255f9d10de310580ced547b082eb9d72018c/sse_starlette-3.4.8-py3-none-any.whl", hash = "sha256:6e82314c786709a3cd9520f2285cf9fff90e181e598e8a357b0cf80f66afba0d", size = 16516, upload-time = "2026-08-05T11:19:48.748Z" },
-]
-
 [[package]]
 name = "starlette"
 version = "1.0.1"
diff --git a/pyproject.toml b/pyproject.toml
index 331bf8034..c44f25f6f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -94,7 +94,7 @@ langgraph-example = [
   "langchain-mcp-adapters>=0.1,<0.3.0",
   "langchain-openai>=0.3,<2.0",
   "langgraph>=1.2,<2.0",
-  "mcp>=1.10",
+  "mcp>=1.28.1,<2.0",
 ]
 
 dev = [
@@ -118,7 +118,7 @@ package = [
 
 test = [
     "fastapi~=0.138",
-    "mcp>=1.23",
+    "mcp>=1.28.1,<2.0",
     "mcp-server-time~=2026.7",
     "pkginfo~=1.12",
     "pytest>=8",
diff --git a/tests/adapters/test_adapter_package_metadata.py b/tests/adapters/test_adapter_package_metadata.py
index 4b9ef5ab6..3d77cfac5 100644
--- a/tests/adapters/test_adapter_package_metadata.py
+++ b/tests/adapters/test_adapter_package_metadata.py
@@ -56,7 +56,7 @@ def load_pyproject(path: str) -> dict:
             f"nemo-fabric-adapters-hermes[harness] == {PACKAGE_VERSION}; "
             "python_version < '3.14'"
         ),
-        "harness": ["hermes-agent[mcp]>=0.19.0; python_version < '3.14'"],
+        "harness": ["hermes-agent>=0.19.0; python_version < '3.14'"],
         "relay": ["nemo-relay>=0.7.2,<0.8"],
     },
 }
diff --git a/uv.lock b/uv.lock
index 5c17eca8b..5cafcf138 100644
--- a/uv.lock
+++ b/uv.lock
@@ -441,8 +441,7 @@ version = "0.2.120"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
-    { name = "mcp", version = "1.26.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.14'" },
-    { name = "mcp", version = "1.28.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.14'" },
+    { name = "mcp" },
     { name = "sniffio" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/eb/7f/7b69aed292a4edecae132e4dbe6b6decb4e88ec142fc91d117b19058c9e0/claude_agent_sdk-0.2.120.tar.gz", hash = "sha256:e428552f79a76e0d85789369eeb58249b33f350200124e5fc86b24168bd00805", size = 268639, upload-time = "2026-07-15T23:18:50.997Z" }
@@ -1194,12 +1193,6 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/e5/30/c85be8290e9565dc3c7a9720e93f3e59e09b1b163487be4946c3aa848f80/hermes_agent-0.19.0-py3-none-any.whl", hash = "sha256:bd0bac012aee38a60894781f4597dc29ee7bedb3448540249921f10d3bef327f", size = 10144439, upload-time = "2026-07-20T18:37:26.417Z" },
 ]
 
-[package.optional-dependencies]
-mcp = [
-    { name = "mcp", version = "1.26.0", source = { registry = "https://pypi.org/simple" } },
-    { name = "starlette", version = "1.0.1", source = { registry = "https://pypi.org/simple" } },
-]
-
 [[package]]
 name = "hf-xet"
 version = "1.5.1"
@@ -1650,8 +1643,7 @@ version = "0.2.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "langchain-core" },
-    { name = "mcp", version = "1.26.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.14'" },
-    { name = "mcp", version = "1.28.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.14'" },
+    { name = "mcp" },
     { name = "typing-extensions" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/0e/66/1cc7039e2daaddcdea9d8887851fe6eb67401925999b2aa394aa855c7132/langchain_mcp_adapters-0.2.2.tar.gz", hash = "sha256:12d39e91ae4389c54b61b221094e53850b6e152934d8bc10c80665d600e76530", size = 37942, upload-time = "2026-03-16T17:13:30.35Z" }
@@ -1968,51 +1960,10 @@ zig = [
     { name = "ziglang" },
 ]
 
-[[package]]
-name = "mcp"
-version = "1.26.0"
-source = { registry = "https://pypi.org/simple" }
-resolution-markers = [
-    "python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32'",
-    "python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'emscripten'",
-    "python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'linux'",
-    "python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform != 'emscripten' and sys_platform != 'linux' and sys_platform != 'win32'",
-    "python_full_version < '3.12' and sys_platform == 'linux'",
-    "python_full_version < '3.12' and sys_platform == 'win32'",
-    "python_full_version < '3.12' and sys_platform == 'emscripten'",
-    "python_full_version < '3.12' and sys_platform != 'emscripten' and sys_platform != 'linux' and sys_platform != 'win32'",
-]
-dependencies = [
-    { name = "anyio" },
-    { name = "httpx" },
-    { name = "httpx-sse" },
-    { name = "jsonschema" },
-    { name = "pydantic" },
-    { name = "pydantic-settings" },
-    { name = "pyjwt", extra = ["crypto"] },
-    { name = "python-multipart" },
-    { name = "pywin32", marker = "sys_platform == 'win32'" },
-    { name = "sse-starlette" },
-    { name = "starlette", version = "1.0.1", source = { registry = "https://pypi.org/simple" } },
-    { name = "typing-extensions" },
-    { name = "typing-inspection" },
-    { name = "uvicorn", marker = "sys_platform != 'emscripten'" },
-]
-sdist = { url = "https://files.pythonhosted.org/packages/fc/6d/62e76bbb8144d6ed86e202b5edd8a4cb631e7c8130f3f4893c3f90262b10/mcp-1.26.0.tar.gz", hash = "sha256:db6e2ef491eecc1a0d93711a76f28dec2e05999f93afd48795da1c1137142c66", size = 608005, upload-time = "2026-01-24T19:40:32.468Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/fd/d9/eaa1f80170d2b7c5ba23f3b59f766f3a0bb41155fbc32a69adfa1adaaef9/mcp-1.26.0-py3-none-any.whl", hash = "sha256:904a21c33c25aa98ddbeb47273033c435e595bbacfdb177f4bd87f6dceebe1ca", size = 233615, upload-time = "2026-01-24T19:40:30.652Z" },
-]
-
 [[package]]
 name = "mcp"
 version = "1.28.1"
 source = { registry = "https://pypi.org/simple" }
-resolution-markers = [
-    "python_full_version >= '3.14' and sys_platform == 'win32'",
-    "python_full_version >= '3.14' and sys_platform == 'emscripten'",
-    "python_full_version >= '3.14' and sys_platform == 'linux'",
-    "python_full_version >= '3.14' and sys_platform != 'emscripten' and sys_platform != 'linux' and sys_platform != 'win32'",
-]
 dependencies = [
     { name = "anyio" },
     { name = "httpx" },
@@ -2024,7 +1975,8 @@ dependencies = [
     { name = "python-multipart" },
     { name = "pywin32", marker = "sys_platform == 'win32'" },
     { name = "sse-starlette" },
-    { name = "starlette", version = "1.3.1", source = { registry = "https://pypi.org/simple" } },
+    { name = "starlette", version = "1.0.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.14'" },
+    { name = "starlette", version = "1.3.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.14'" },
     { name = "typing-extensions" },
     { name = "typing-inspection" },
     { name = "uvicorn", marker = "sys_platform != 'emscripten'" },
@@ -2039,8 +1991,7 @@ name = "mcp-server-time"
 version = "2026.7.10"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "mcp", version = "1.26.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.14'" },
-    { name = "mcp", version = "1.28.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.14'" },
+    { name = "mcp" },
     { name = "pydantic" },
     { name = "tzdata" },
     { name = "tzlocal" },
@@ -2299,8 +2250,7 @@ langgraph-example = [
     { name = "langchain-mcp-adapters" },
     { name = "langchain-openai" },
     { name = "langgraph" },
-    { name = "mcp", version = "1.26.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.14'" },
-    { name = "mcp", version = "1.28.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.14'" },
+    { name = "mcp" },
 ]
 package = [
     { name = "maturin" },
@@ -2308,8 +2258,7 @@ package = [
 ]
 test = [
     { name = "fastapi" },
-    { name = "mcp", version = "1.26.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.14'" },
-    { name = "mcp", version = "1.28.1", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.14'" },
+    { name = "mcp" },
     { name = "mcp-server-time" },
     { name = "pkginfo" },
     { name = "pytest" },
@@ -2371,7 +2320,7 @@ langgraph-example = [
     { name = "langchain-mcp-adapters", specifier = ">=0.1,<0.3.0" },
     { name = "langchain-openai", specifier = ">=0.3,<2.0" },
     { name = "langgraph", specifier = ">=1.2,<2.0" },
-    { name = "mcp", specifier = ">=1.10" },
+    { name = "mcp", specifier = ">=1.28.1,<2.0" },
 ]
 package = [
     { name = "maturin", marker = "sys_platform != 'linux'", specifier = ">=1.9.3,<2.0" },
@@ -2379,7 +2328,7 @@ package = [
 ]
 test = [
     { name = "fastapi", specifier = "~=0.138" },
-    { name = "mcp", specifier = ">=1.23" },
+    { name = "mcp", specifier = ">=1.28.1,<2.0" },
     { name = "mcp-server-time", specifier = "~=2026.7" },
     { name = "pkginfo", specifier = "~=1.12" },
     { name = "pytest", specifier = ">=8" },
@@ -2513,13 +2462,13 @@ dependencies = [
 
 [package.optional-dependencies]
 harness = [
-    { name = "hermes-agent", extra = ["mcp"] },
+    { name = "hermes-agent" },
 ]
 
 [package.metadata]
 requires-dist = [
-    { name = "hermes-agent", extras = ["mcp"], marker = "python_full_version < '3.14' and extra == 'full'", specifier = ">=0.19.0" },
-    { name = "hermes-agent", extras = ["mcp"], marker = "python_full_version < '3.14' and extra == 'harness'", specifier = ">=0.19.0" },
+    { name = "hermes-agent", marker = "python_full_version < '3.14' and extra == 'full'", specifier = ">=0.19.0" },
+    { name = "hermes-agent", marker = "python_full_version < '3.14' and extra == 'harness'", specifier = ">=0.19.0" },
     { name = "nemo-fabric-adapter-contract", editable = "adapter-contract" },
     { name = "nemo-fabric-adapters-common", editable = "adapters/common" },
     { name = "nemo-relay", marker = "extra == 'full'", specifier = ">=0.7.2,<0.8" },