diff --git a/.github/workflows/typecheck.yml b/.github/workflows/typecheck.yml
index 010f1524..83eca624 100644
--- a/.github/workflows/typecheck.yml
+++ b/.github/workflows/typecheck.yml
@@ -53,3 +53,6 @@ jobs:
 
       - name: Run pyright (strict, Python 3.13)
         run: nox -s typecheck_functions
+
+      - name: Check packaged types (strict, Python 3.13)
+        run: nox -s typecheck_functions_package
diff --git a/azure-functions-durable/CHANGELOG.md b/azure-functions-durable/CHANGELOG.md
index e9c022e6..fea8d4dc 100644
--- a/azure-functions-durable/CHANGELOG.md
+++ b/azure-functions-durable/CHANGELOG.md
@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ADDED
 
+- Added PEP 561 type information so strict type checkers recognize
+`azure.durable_functions` as a typed package.
 - Added `azure.durable_functions.testing.execute_entity()` for unit testing
 function-style and class-based entities without a Functions host or Durable Task
 backend. The helper returns the operation result, resulting state, and typed
diff --git a/azure-functions-durable/azure/durable_functions/py.typed b/azure-functions-durable/azure/durable_functions/py.typed
new file mode 100644
index 00000000..e69de29b
diff --git a/azure-functions-durable/pyproject.toml b/azure-functions-durable/pyproject.toml
index fb675b4c..62698a04 100644
--- a/azure-functions-durable/pyproject.toml
+++ b/azure-functions-durable/pyproject.toml
@@ -39,5 +39,8 @@ changelog = "https://github.com/microsoft/durabletask-python/blob/main/azure-fun
 [tool.setuptools.packages.find]
 include = ["azure.durable_functions", "azure.durable_functions.*"]
 
+[tool.setuptools.package-data]
+"azure.durable_functions" = ["py.typed"]
+
 [tool.pytest.ini_options]
 minversion = "6.0"
diff --git a/noxfile.py b/noxfile.py
index 075c71cc..99a3e1e5 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -12,6 +12,7 @@
 
     nox -s lint
     nox -s typecheck_core
+    nox -s typecheck_functions_package
     nox -s core_tests-3.10
     nox -s azuremanaged_tests-3.10
     nox -s functions_unit-3.13
@@ -27,8 +28,10 @@
 import shutil
 import socket
 import subprocess
+import tarfile
 import time
 import uuid
+import zipfile
 from pathlib import Path
 from typing import Sequence
 
@@ -323,6 +326,79 @@ def typecheck_functions(session: nox.Session) -> None:
     )
 
 
+@nox.session(python=["3.13"])
+def typecheck_functions_package(session: nox.Session) -> None:
+    """Check the installed Functions and core wheels with strict Pyright."""
+    session.install("build", "pyright")
+    temp_dir = Path(session.create_tmp())
+    artifact_dir = temp_dir / "functions-dist"
+    core_artifact_dir = temp_dir / "core-dist"
+    if artifact_dir.exists():
+        shutil.rmtree(artifact_dir)
+    if core_artifact_dir.exists():
+        shutil.rmtree(core_artifact_dir)
+    session.run(
+        "python",
+        "-m",
+        "build",
+        "--outdir",
+        str(artifact_dir),
+        str(AZURE_FUNCTIONS_DURABLE),
+    )
+    session.run(
+        "python",
+        "-m",
+        "build",
+        "--wheel",
+        "--outdir",
+        str(core_artifact_dir),
+        str(REPO_ROOT),
+    )
+
+    wheels = list(artifact_dir.glob("azure_functions_durable-*.whl"))
+    sdists = list(artifact_dir.glob("azure_functions_durable-*.tar.gz"))
+    core_wheels = list(core_artifact_dir.glob("durabletask-*.whl"))
+    if len(wheels) != 1 or len(sdists) != 1 or len(core_wheels) != 1:
+        session.error(
+            "Expected one provider wheel, provider source distribution, "
+            "and core wheel")
+    wheel = wheels[0]
+    sdist = sdists[0]
+    core_wheel = core_wheels[0]
+    marker = "azure/durable_functions/py.typed"
+    with zipfile.ZipFile(wheel) as archive:
+        if marker not in archive.namelist():
+            session.error(f"{marker} is missing from {wheel.name}")
+    with tarfile.open(sdist, "r:gz") as archive:
+        if not any(name.endswith(f"/{marker}") for name in archive.getnames()):
+            session.error(f"{marker} is missing from {sdist.name}")
+
+    session.install(str(core_wheel), str(wheel))
+    session.run(
+        "python",
+        "-m",
+        "pip",
+        "install",
+        "--force-reinstall",
+        "--no-deps",
+        str(core_wheel),
+        str(wheel),
+    )
+    python_path = session.run(
+        "python",
+        "-c",
+        "import sys; print(sys.executable)",
+        silent=True,
+    ).strip()
+    session.run(
+        "pyright",
+        "--pythonpath",
+        python_path,
+        "-p",
+        "tests/azure-functions-durable/typing/pyrightconfig.json",
+    )
+
+
 @nox.session(python=PYTHON_VERSIONS)
 def core_tests(session: nox.Session) -> None:
     """Run core SDK tests against an automatically started Blob Azurite."""
@@ -459,6 +535,7 @@ def ci(session: nox.Session) -> None:
     session.notify("lint", ())
     session.notify("typecheck_core", ())
     session.notify("typecheck_functions", ())
+    session.notify("typecheck_functions_package", ())
     session.notify(f"core_tests-{python_version}", ())
     session.notify(f"azuremanaged_tests-{python_version}", ())
     session.notify("functions_unit-3.13", ())
diff --git a/tests/azure-functions-durable/typing/import_package.py b/tests/azure-functions-durable/typing/import_package.py
new file mode 100644
index 00000000..fe91818c
--- /dev/null
+++ b/tests/azure-functions-durable/typing/import_package.py
@@ -0,0 +1,21 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+from datetime import timedelta
+
+import azure.durable_functions as df
+
+
+def create_app() -> df.DFApp:
+    return df.DFApp()
+
+
+def create_retry_policy() -> df.RetryPolicy:
+    return df.RetryPolicy(
+        first_retry_interval=timedelta(seconds=1),
+        max_number_of_attempts=3,
+    )
+
+
+def activity_is_complete(context: df.DurableOrchestrationContext) -> bool:
+    return context.call_activity("activity").is_complete
diff --git a/tests/azure-functions-durable/typing/pyrightconfig.json b/tests/azure-functions-durable/typing/pyrightconfig.json
new file mode 100644
index 00000000..68700dda
--- /dev/null
+++ b/tests/azure-functions-durable/typing/pyrightconfig.json
@@ -0,0 +1,7 @@
+{
+  "include": [
+    "import_package.py"
+  ],
+  "pythonVersion": "3.13",
+  "typeCheckingMode": "strict"
+}