diff --git a/dinamis_sdk/__init__.py b/dinamis_sdk/__init__.py
index 9759375e836ce9712d3cb93f5db08bb063ed5b70..dfa1b29280b736d40a4679b6db149560faf4061a 100644
--- a/dinamis_sdk/__init__.py
+++ b/dinamis_sdk/__init__.py
@@ -1,5 +1,12 @@
 """Dinamis SDK module."""
 import pkg_resources
 __version__ = pkg_resources.require("dinamis-sdk")[0].version
-from dinamis_sdk.s3 import sign_inplace  # noqa
+from dinamis_sdk.s3 import (
+    sign,
+    sign_inplace,
+    sign_urls,
+    sign_item,
+    sign_asset,
+    sign_item_collection
+)  # noqa
 from dinamis_sdk import auth  # noqa
diff --git a/dinamis_sdk/auth.py b/dinamis_sdk/auth.py
index 6c0d5101f409aff4694555f2d91c96d365a7c8a1..d2fbd211687e1750d6d846cbcec7dab5ed076c81 100644
--- a/dinamis_sdk/auth.py
+++ b/dinamis_sdk/auth.py
@@ -9,8 +9,8 @@ from typing import Dict
 import requests
 from pydantic import BaseModel, Field  # pylint: disable = no-name-in-module
 import qrcode
-from .utils import log, JWT_FILE, TOKEN_ENDPOINT, AUTH_BASE_URL, TOKEN_SERVER
 import urllib3
+from .utils import log, JWT_FILE, TOKEN_ENDPOINT, AUTH_BASE_URL, TOKEN_SERVER
 
 
 class JWT(BaseModel):  # pylint: disable = R0903
@@ -250,6 +250,7 @@ class OAuth2Session:
 
 
 class TokenServer:
+    """Token server."""
     def __init__(self, endpoint: str, total_retry=5, backoff_factor=0.8):
         self.endpoint = endpoint
         self.session = requests.Session()
@@ -271,6 +272,7 @@ session = TokenServer(TOKEN_SERVER) if TOKEN_SERVER else OAuth2Session()
 
 
 def _get_access_token():
+    """Get an access token."""
     return session.get_access_token()
 
 
diff --git a/dinamis_sdk/s3.py b/dinamis_sdk/s3.py
index ef210fde0e040654545b2e48340d2a5ae0dac15b..0ea19ec6e24063179b66ca788ceecd36401a50d0 100644
--- a/dinamis_sdk/s3.py
+++ b/dinamis_sdk/s3.py
@@ -145,7 +145,7 @@ def sign_string(url: str, copy: bool = True) -> str:
     return sign_urls(urls=[url])[url]
 
 
-def sign_urls(urls: List[str]) -> str:
+def sign_urls(urls: List[str]) -> Dict[str, str]:
     """Sign URLs with a S3 Token.
 
     Signing URL allows read access to files in storage.
@@ -487,9 +487,9 @@ def get_signed_urls(
             chunk_start = i_chunk * MAX_URLS
             chunk_end = min(chunk_start + MAX_URLS, n_urls)
             not_signed_urls_chunk = not_signed_urls[chunk_start:chunk_end]
-            params={"urls": not_signed_urls_chunk}
+            params = {"urls": not_signed_urls_chunk}
             if SIGNED_URL_DURATION_SECONDS:
-                params.update({"duration_seconds": SIGNED_URL_DURATION_SECONDS})
+                params["duration_seconds"] = SIGNED_URL_DURATION_SECONDS
             response = session.post(
                 f"{S3_SIGNING_ENDPOINT}sign_urls",
                 params=params,
diff --git a/setup.py b/setup.py
index c80046c155d9610313d792f5f74743093053aad4..3655b4b9f888873bff89f29e3165219234beeb7a 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@ install_requires = [
 
 setup(
     name="dinamis-sdk",
-    version="0.1.7",
+    version="0.1.8",
     description="DINAMIS SDK",
     python_requires=">=3.8",
     author="Remi Cresson",
diff --git a/tests/test_spot-6-7-drs.py b/tests/test_spot-6-7-drs.py
index 814e232e42c086e1ab30e43a3eed8541b64c3f1c..eb4f285adfb0fc9e3409817777989b4c2de6c6fb 100644
--- a/tests/test_spot-6-7-drs.py
+++ b/tests/test_spot-6-7-drs.py
@@ -2,7 +2,7 @@ import dinamis_sdk
 import pystac_client
 
 api = pystac_client.Client.open(
-   'https://stacapi-dinamis.apps.okd.crocc.meso.umontpellier.fr',
+   'https://stacapi-cdos.apps.okd.crocc.meso.umontpellier.fr',
    modifier=dinamis_sdk.sign_inplace,
 )
 res = api.search(
diff --git a/tests/test_super-s2.py b/tests/test_super-s2.py
index 5442f7485d0bd494b0f35fc6e0c1fd1b3218ceb2..5548f21b610621a0191024743c6f44898d0f7059 100644
--- a/tests/test_super-s2.py
+++ b/tests/test_super-s2.py
@@ -2,7 +2,7 @@ import dinamis_sdk
 import pystac_client
 
 api = pystac_client.Client.open(
-   'https://stacapi-dinamis.apps.okd.crocc.meso.umontpellier.fr',
+   'https://stacapi-cdos.apps.okd.crocc.meso.umontpellier.fr',
    modifier=dinamis_sdk.sign_inplace,
 )
 res = api.search(