diff --git a/CHANGES.rst b/CHANGES.rst
index 0c22d20..78b7455 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,11 @@ Changes
 Unreleased
 ----------
 
+Version 0.9.0
+-------------
+
+Released 2021-06-04
+
 - Introduce new() into CWT/COSE. `#115 <https://github.com/dajiaji/python-cwt/pull/115>`__
 - Rename Claims.from_dict to Claims.new. `#115 <https://github.com/dajiaji/python-cwt/pull/115>`__
 - Rename COSEKey.from_dict to COSEKey.new. `#115 <https://github.com/dajiaji/python-cwt/pull/115>`__
diff --git a/README.md b/README.md
index 32d91f4..a0e80fb 100644
--- a/README.md
+++ b/README.md
@@ -36,14 +36,23 @@ and [CWT](https://tools.ietf.org/html/rfc8392) is required to use this library.
 
 Followings are typical and basic examples which create CWT, verify and decode it:
 
-- [MACed CWT](#maced-cwt)
-- [Signed CWT](#signed-cwt)
-- [Encrypted CWT](#encrypted-cwt)
-- [Nested CWT](#nested-cwt)
-- [CWT with User-Defined Claims](#cwt-with-user-defined-claims)
-- [CWT with PoP Key](#cwt-with-pop-key)
+- CWT API
+    - [MACed CWT](#maced-cwt)
+    - [Signed CWT](#signed-cwt)
+    - [Encrypted CWT](#encrypted-cwt)
+    - [Nested CWT](#nested-cwt)
+    - [CWT with User-Defined Claims](#cwt-with-user-defined-claims)
+    - [CWT with PoP Key](#cwt-with-pop-key)
+    - (See [CWT Usage Examples](https://python-cwt.readthedocs.io/en/stable/cwt_usage.html) for details)
+- COSE API
+    - [COSE MAC0](#cose-mac0)
+    - [COSE MAC](#cose-mac)
+    - [COSE Encrypt0](#cose-encrypt0)
+    - [COSE Encrypt](#cose-encrypt)
+    - [COSE Signature1](#cose-signature1)
+    - [COSE Signature](#cose-signature)
+    - (See [COSE Usage Examples](https://python-cwt.readthedocs.io/en/stable/cose_usage.html) for details)
 
-See [Usage Examples](https://python-cwt.readthedocs.io/en/stable/usage.html) for details.
 
 ### MACed CWT
 
@@ -365,6 +374,228 @@ extracted_pop_key.verify(msg, sig)
 [Usage Examples](https://python-cwt.readthedocs.io/en/stable/usage.html#cwt-with-pop-key) shows other examples which
 use other confirmation methods for PoP keys.
 
+### COSE MAC0
+
+Create a COSE MAC0 message, verify and decode it as follows:
+
+```py
+from cwt import COSE, COSEKey
+
+mac_key = COSEKey.from_symmetric_key(alg="HS256", kid="01")
+ctx = COSE(alg_auto_inclusion=True, kid_auto_inclusion=True)
+encoded = ctx.encode_and_mac(b"Hello world!", mac_key)
+decoded = ctx.decode(encoded, mac_key)
+```
+
+Following two samples are other ways of writing the above example:
+
+```py
+from cwt import COSE, COSEKey
+
+mac_key = COSEKey.from_symmetric_key(alg="HS256", kid="01")
+ctx = COSE.new()
+encoded = ctx.encode_and_mac(
+    b"Hello world!",
+    mac_key,
+    protected={"alg": "HS256"},
+    unprotected={"kid": "01"},
+)
+decoded = ctx.decode(encoded, mac_key)
+```
+
+```py
+from cwt import COSE, COSEKey
+
+mac_key = COSEKey.from_symmetric_key(alg="HS256", kid="01")
+ctx = COSE.new()
+encoded = ctx.encode_and_mac(
+    b"Hello world!",
+    mac_key,
+    protected={1: 5},
+    unprotected={4: b"01"},
+)
+decoded = ctx.decode(encoded, mac_key)
+```
+
+### COSE MAC
+
+Create a COSE MAC message, verify and decode it as follows:
+
+```py
+from cwt import COSE, COSEKey
+
+recipient = Recipient.from_json({"alg": "direct", "kid": "01"})
+mac_key = COSEKey.from_symmetric_key(alg="HS512", kid="01")
+ctx = COSE.new()
+encoded = ctx.encode_and_mac(b"Hello world!", mac_key, recipients=[recipient])
+decoded = ctx.decode(encoded, mac_key)
+```
+
+Following sample is another way of writing the above example:
+
+```py
+from cwt import COSE, COSEKey
+
+recipient = Recipient.new(unprotected={"alg": "direct", "kid": "01"})
+mac_key = COSEKey.from_symmetric_key(alg="HS512", kid="01")
+ctx = COSE.new()
+encoded = ctx.encode_and_mac(b"Hello world!", mac_key, recipients=[recipient])
+decoded = ctx.decode(encoded, mac_key)
+```
+
+### COSE Encrypt0
+
+Create a COSE Encrypt0 message, verify and decode it as follows:
+
+```py
+from cwt import COSE, COSEKey
+
+enc_key = COSEKey.from_symmetric_key(alg="ChaCha20/Poly1305", kid="01")
+ctx = COSE.new(alg_auto_inclusion=True, kid_auto_inclusion=True)
+encoded = ctx.encode_and_encrypt(b"Hello world!", enc_key)
+decoded = ctx.decode(encoded, enc_key)
+```
+
+Following sample is another way of writing the above example:
+
+```py
+from cwt import COSE, COSEKey
+
+enc_key = COSEKey.from_symmetric_key(alg="ChaCha20/Poly1305", kid="01")
+ctx = COSE.new()
+encoded = ctx.encode_and_encrypt(
+    b"Hello world!",
+    enc_key,
+    nonce=nonce,
+    protected={"alg": "ChaCha20/Poly1305"},
+    unprotected={"kid": "01"},
+)
+decoded = ctx.decode(encoded, enc_key)
+```
+
+### COSE Encrypt
+
+Create a COSE Encrypt message, verify and decode it as follows:
+
+```py
+from cwt import COSE, COSEKey
+
+recipient = Recipient.from_json({"alg": "direct", "kid": "01"})
+enc_key = COSEKey.from_symmetric_key(alg="ChaCha20/Poly1305", kid="01")
+ctx = COSE.new()
+encoded = ctx.encode_and_encrypt(
+    b"Hello world!",
+    enc_key,
+    recipients=[recipient],
+)
+decoded = ctx.decode(encoded, enc_key)
+```
+
+Following sample is another way of writing the above example:
+
+```py
+from cwt import COSE, COSEKey
+
+recipient = Recipient.new(unprotected={"alg": "direct", "kid": "01"})
+enc_key = COSEKey.from_symmetric_key(alg="ChaCha20/Poly1305", kid="01")
+ctx = COSE.new()
+encoded = ctx.encode_and_mac(b"Hello world!", enc_key, recipients=[recipient])
+decoded = ctx.decode(encoded, enc_key)
+```
+
+### COSE Signature1
+
+Create a COSE Signature1 message, verify and decode it as follows:
+
+```py
+from cwt import COSE, COSEKey
+
+sig_key = COSEKey.from_jwk(
+    {
+        "kty": "EC",
+        "kid": "01",
+        "crv": "P-256",
+        "x": "usWxHK2PmfnHKwXPS54m0kTcGJ90UiglWiGahtagnv8",
+        "y": "IBOL-C3BttVivg-lSreASjpkttcsz-1rb7btKLv8EX4",
+        "d": "V8kgd2ZBRuh2dgyVINBUqpPDr7BOMGcF22CQMIUHtNM",
+    }
+)
+ctx = COSE.new(alg_auto_inclusion=True, kid_auto_inclusion=True)
+encoded = ctx.encode_and_sign(b"Hello world!", sig_key)
+decoded = ctx.decode(encoded, sig_key)
+```
+
+Following sample is another way of writing the above example:
+
+```py
+from cwt import COSE, COSEKey
+
+sig_key = COSEKey.from_jwk(
+    {
+        "kty": "EC",
+        "kid": "01",
+        "crv": "P-256",
+        "x": "usWxHK2PmfnHKwXPS54m0kTcGJ90UiglWiGahtagnv8",
+        "y": "IBOL-C3BttVivg-lSreASjpkttcsz-1rb7btKLv8EX4",
+        "d": "V8kgd2ZBRuh2dgyVINBUqpPDr7BOMGcF22CQMIUHtNM",
+    }
+)
+ctx = COSE.new()
+encoded = ctx.encode_and_sign(
+    b"Hello world!",
+    sig_key,
+    protected={"alg": "ES256"},
+    unprotected={"kid": "01"},
+)
+decoded = ctx.decode(encoded, sig_key)
+```
+
+### COSE Signature
+
+Create a COSE Signature message, verify and decode it as follows:
+
+```py
+from cwt import COSE, Signer
+
+signer = Signer.from_jwk(
+    {
+        "kty": "EC",
+        "kid": "01",
+        "crv": "P-256",
+        "x": "usWxHK2PmfnHKwXPS54m0kTcGJ90UiglWiGahtagnv8",
+        "y": "IBOL-C3BttVivg-lSreASjpkttcsz-1rb7btKLv8EX4",
+        "d": "V8kgd2ZBRuh2dgyVINBUqpPDr7BOMGcF22CQMIUHtNM",
+    },
+)
+ctx = COSE.new()
+encoded = ctx.encode_and_sign(b"Hello world!", signers=[signer])
+decoded = ctx.decode(encoded, signer.cose_key)
+```
+
+Following sample is another way of writing the above example:
+
+```py
+from cwt import COSE, COSEKey, Signer
+
+signer = Signer.new(
+    cose_key=COSEKey.from_jwk(
+        {
+            "kty": "EC",
+            "kid": "01",
+            "crv": "P-256",
+            "x": "usWxHK2PmfnHKwXPS54m0kTcGJ90UiglWiGahtagnv8",
+            "y": "IBOL-C3BttVivg-lSreASjpkttcsz-1rb7btKLv8EX4",
+            "d": "V8kgd2ZBRuh2dgyVINBUqpPDr7BOMGcF22CQMIUHtNM",
+        }
+    ),
+    protected={"alg": "ES256"},
+    unprotected={"kid": "01"},
+)
+ctx = COSE.new()
+encoded = ctx.encode_and_sign(b"Hello world!", signers=[signer])
+decoded = ctx.decode(encoded, signer.cose_key)
+```
+
 ## Tests
 
 You can run tests from the project root after cloning with:
diff --git a/cwt/__init__.py b/cwt/__init__.py
index 8e71343..001de83 100644
--- a/cwt/__init__.py
+++ b/cwt/__init__.py
@@ -15,7 +15,7 @@
 from .recipient import Recipient
 from .signer import Signer
 
-__version__ = "0.8.1"
+__version__ = "0.9.0"
 __title__ = "cwt"
 __description__ = "A Python implementation of CWT/COSE"
 __url__ = "https://python-cwt.readthedocs.io"