diff --git a/spec/api/asciicast_create_spec.rb b/spec/api/asciicast_create_spec.rb
index 47aaf64..0606a66 100644
--- a/spec/api/asciicast_create_spec.rb
+++ b/spec/api/asciicast_create_spec.rb
@@ -2,33 +2,271 @@ require 'rails_helper'
 
 describe "Asciicast creation" do
 
-  before do
-    post '/api/asciicasts', asciicast: {
-      meta:          fixture_file(meta_filename, 'application/json'),
-      stdout:        fixture_file('stdout', 'application/octet-stream'),
-      stdout_timing: fixture_file('stdout.time', 'application/octet-stream')
-    }
+  let(:created_asciicast) { Asciicast.last }
+
+  def basic_auth_header(user, password)
+    { 'HTTP_AUTHORIZATION' => ActionController::HttpAuthentication::Basic.encode_credentials(user, password) }
+  end
+
+  def user_agent_header(user_agent)
+    { 'User-Agent' => user_agent }
+  end
+
+  def headers(user, password, user_agent)
+    h = {}
+
+    h.merge!(basic_auth_header(user, password)) if user
+    h.merge!(user_agent_header(user_agent)) if user_agent
+
+    h
   end
 
-  let(:meta_filename) { 'meta.json' }
+  context '<= v0.9.7 client' do
+    subject { make_request }
+
+    def make_request
+      post '/api/asciicasts',
+        {
+          asciicast: {
+            meta:          fixture_file('0.9.7/meta.json',   'application/json'),
+            stdout:        fixture_file('0.9.7/stdout',      'application/octet-stream'),
+            stdout_timing: fixture_file('0.9.7/stdout.time', 'application/octet-stream')
+        }
+      }, headers(nil, nil, 'python-requests blah/blah')
+    end
+
+    before { subject }
+
+    it 'creates asciicast with given command' do
+      expect(created_asciicast.command).to eq('/bin/bash')
+    end
+
+    it 'creates asciicast with given duration' do
+      expect(created_asciicast.duration).to eq(11.146430015564)
+    end
+
+    it 'creates asciicast with given shell' do
+      expect(created_asciicast.shell).to eq('/bin/zsh')
+    end
+
+    it 'creates asciicast with given terminal type' do
+      expect(created_asciicast.terminal_type).to eq('screen-256color')
+    end
+
+    it 'creates asciicast with given terminal width' do
+      expect(created_asciicast.terminal_columns).to eq(96)
+    end
+
+    it 'creates asciicast with given terminal height' do
+      expect(created_asciicast.terminal_lines).to eq(26)
+    end
+
+    it 'creates asciicast with given title' do
+      expect(created_asciicast.title).to eq('bashing :)')
+    end
+
+    it 'creates asciicast with given uname' do
+      expect(created_asciicast.uname).to eq('Linux 3.9.9-302.fc19.x86_64 #1 SMP Sat Jul 6 13:41:07 UTC 2013 x86_64')
+    end
+
+    it 'creates asciicast with no user agent set' do
+      expect(created_asciicast.user_agent).to be(nil)
+    end
+
+    context 'when a user with given token does not exist' do
+      let(:created_user) { User.last }
+
+      it 'creates new user with given username and token' do
+        expect(created_user.temporary_username).to eq('kill')
+        expect(created_user.api_tokens.first.token).to eq('f33e6188-f53c-11e2-abf4-84a6c827e88b')
+      end
+
+      it 'creates asciicast assigned to newly created user' do
+        expect(created_asciicast.user).to eq(created_user)
+      end
+    end
+
+    context 'when a user with given token exists' do
+      let(:user) { User.create_with_token('f33e6188-f53c-11e2-abf4-84a6c827e88b', 'kill') }
+
+      subject do
+        user
+        make_request
+      end
+
+      it 'creates asciicast assigned to a user with given token' do
+        expect(created_asciicast.user).to eq(user)
+      end
+    end
 
-  it 'returns the URL to the uploaded asciicast' do
-    expect(response.body).to eq(asciicast_url(Asciicast.last))
+    it 'returns the URL to the uploaded asciicast' do
+      expect(response.body).to eq(asciicast_url(created_asciicast))
+    end
   end
 
-  context "when json includes uname (legacy)" do
-    let(:meta_filename) { 'meta-with-uname.json' }
+  context 'v0.9.8 client' do
+    subject { make_request }
+
+    def make_request
+      post '/api/asciicasts',
+        {
+          asciicast: {
+            meta:          fixture_file('0.9.8/meta.json',   'application/json'),
+            stdout:        fixture_file('0.9.8/stdout',      'application/octet-stream'),
+            stdout_timing: fixture_file('0.9.8/stdout.time', 'application/octet-stream')
+          }
+        }, headers(nil, nil, 'asciinema/0.9.8 CPython/2.7.4 Jola/Misio-Foo')
+    end
+
+    before { subject }
+
+    it 'creates asciicast with given command' do
+      expect(created_asciicast.command).to eq('/bin/bash')
+    end
+
+    it 'creates asciicast with given duration' do
+      expect(created_asciicast.duration).to eq(11.146430015564)
+    end
+
+    it 'creates asciicast with given shell' do
+      expect(created_asciicast.shell).to eq('/bin/zsh')
+    end
+
+    it 'creates asciicast with given terminal type' do
+      expect(created_asciicast.terminal_type).to eq('screen-256color')
+    end
+
+    it 'creates asciicast with given terminal width' do
+      expect(created_asciicast.terminal_columns).to eq(96)
+    end
+
+    it 'creates asciicast with given terminal height' do
+      expect(created_asciicast.terminal_lines).to eq(26)
+    end
+
+    it 'creates asciicast with given title' do
+      expect(created_asciicast.title).to eq('bashing :)')
+    end
+
+    it 'creates asciicast with given uname' do
+      expect(created_asciicast.uname).to be(nil)
+    end
+
+    it 'creates asciicast with given user agent' do
+      expect(created_asciicast.user_agent).to eq('asciinema/0.9.8 CPython/2.7.4 Jola/Misio-Foo')
+    end
+
+    context 'when a user with given token does not exist' do
+      let(:created_user) { User.last }
+
+      it 'creates new user with given username and token' do
+        expect(created_user.temporary_username).to eq('kill')
+        expect(created_user.api_tokens.first.token).to eq('f33e6188-f53c-11e2-abf4-84a6c827e88b')
+      end
+
+      it 'creates asciicast assigned to newly created user' do
+        expect(created_asciicast.user).to eq(created_user)
+      end
+    end
+
+    context 'when a user with given token exists' do
+      let(:user) { User.create_with_token('f33e6188-f53c-11e2-abf4-84a6c827e88b', 'kill') }
+
+      subject do
+        user
+        make_request
+      end
+
+      it 'creates asciicast assigned to a user with given token' do
+        expect(created_asciicast.user).to eq(user)
+      end
+    end
 
     it 'returns the URL to the uploaded asciicast' do
-      expect(response.body).to eq(asciicast_url(Asciicast.last))
+      expect(response.body).to eq(asciicast_url(created_asciicast))
     end
   end
 
-  context "when json doesn't include user_token (anonymous?)" do
-    let(:meta_filename) { 'meta-no-token.json' }
+  context 'v0.9.9 client' do
+    subject { make_request }
+
+    def make_request
+      post '/api/asciicasts',
+        {
+          asciicast: {
+            meta:          fixture_file('0.9.9/meta.json',   'application/json'),
+            stdout:        fixture_file('0.9.9/stdout',      'application/octet-stream'),
+            stdout_timing: fixture_file('0.9.9/stdout.time', 'application/octet-stream')
+          }
+      }, headers('kill', 'f33e6188-f53c-11e2-abf4-84a6c827e88b', 'asciinema/0.9.9 gc/go1.3 jola-amd64')
+    end
+
+    before { subject }
+
+    it 'creates asciicast with given command' do
+      expect(created_asciicast.command).to eq('/bin/bash')
+    end
+
+    it 'creates asciicast with given duration' do
+      expect(created_asciicast.duration).to eq(11.146430015564)
+    end
+
+    it 'creates asciicast with given shell' do
+      expect(created_asciicast.shell).to eq('/bin/zsh')
+    end
+
+    it 'creates asciicast with given terminal type' do
+      expect(created_asciicast.terminal_type).to eq('screen-256color')
+    end
+
+    it 'creates asciicast with given terminal width' do
+      expect(created_asciicast.terminal_columns).to eq(96)
+    end
+
+    it 'creates asciicast with given terminal height' do
+      expect(created_asciicast.terminal_lines).to eq(26)
+    end
+
+    it 'creates asciicast with given title' do
+      expect(created_asciicast.title).to eq('bashing :)')
+    end
+
+    it 'creates asciicast with given uname' do
+      expect(created_asciicast.uname).to be(nil)
+    end
+
+    it 'creates asciicast with given user agent' do
+      expect(created_asciicast.user_agent).to eq('asciinema/0.9.9 gc/go1.3 jola-amd64')
+    end
+
+    context 'when a user with given token does not exist' do
+      let(:created_user) { User.last }
+
+      it 'creates new user with given username and token' do
+        expect(created_user.temporary_username).to eq('kill')
+        expect(created_user.api_tokens.first.token).to eq('f33e6188-f53c-11e2-abf4-84a6c827e88b')
+      end
+
+      it 'creates asciicast assigned to newly created user' do
+        expect(created_asciicast.user).to eq(created_user)
+      end
+    end
+
+    context 'when a user with given token exists' do
+      let(:user) { User.create_with_token('f33e6188-f53c-11e2-abf4-84a6c827e88b', 'kill') }
+
+      subject do
+        user
+        make_request
+      end
+
+      it 'creates asciicast assigned to a user with given token' do
+        expect(created_asciicast.user).to eq(user)
+      end
+    end
 
     it 'returns the URL to the uploaded asciicast' do
-      expect(response.body).to eq(asciicast_url(Asciicast.last))
+      expect(response.body).to eq(asciicast_url(created_asciicast))
     end
   end
 
diff --git a/spec/fixtures/0.9.7/meta.json b/spec/fixtures/0.9.7/meta.json
new file mode 100644
index 0000000..f7773fc
--- /dev/null
+++ b/spec/fixtures/0.9.7/meta.json
@@ -0,0 +1,15 @@
+{
+    "command": "/bin/bash", 
+    "duration": 11.146430015564, 
+    "recorded_at": "Thu, 25 Jul 2013 20:08:57 +0000", 
+    "shell": "/bin/zsh", 
+    "term": {
+        "columns": 96, 
+        "lines": 26, 
+        "type": "screen-256color"
+    }, 
+    "title": "bashing :)", 
+    "uname": "Linux 3.9.9-302.fc19.x86_64 #1 SMP Sat Jul 6 13:41:07 UTC 2013 x86_64", 
+    "user_token": "f33e6188-f53c-11e2-abf4-84a6c827e88b", 
+    "username": "kill"
+}
diff --git a/spec/fixtures/0.9.7/stdout b/spec/fixtures/0.9.7/stdout
new file mode 100644
index 0000000..e6fab7a
Binary files /dev/null and b/spec/fixtures/0.9.7/stdout differ
diff --git a/spec/fixtures/0.9.7/stdout.time b/spec/fixtures/0.9.7/stdout.time
new file mode 100644
index 0000000..e2882b8
Binary files /dev/null and b/spec/fixtures/0.9.7/stdout.time differ
diff --git a/spec/fixtures/0.9.8/meta.json b/spec/fixtures/0.9.8/meta.json
new file mode 100644
index 0000000..f4aef74
--- /dev/null
+++ b/spec/fixtures/0.9.8/meta.json
@@ -0,0 +1,14 @@
+{
+    "command": "/bin/bash", 
+    "duration": 11.146430015564, 
+    "recorded_at": "Thu, 25 Jul 2013 20:08:57 +0000", 
+    "shell": "/bin/zsh", 
+    "term": {
+        "columns": 96, 
+        "lines": 26, 
+        "type": "screen-256color"
+    }, 
+    "title": "bashing :)", 
+    "user_token": "f33e6188-f53c-11e2-abf4-84a6c827e88b", 
+    "username": "kill"
+}
diff --git a/spec/fixtures/0.9.8/stdout b/spec/fixtures/0.9.8/stdout
new file mode 100644
index 0000000..e6fab7a
Binary files /dev/null and b/spec/fixtures/0.9.8/stdout differ
diff --git a/spec/fixtures/0.9.8/stdout.time b/spec/fixtures/0.9.8/stdout.time
new file mode 100644
index 0000000..e2882b8
Binary files /dev/null and b/spec/fixtures/0.9.8/stdout.time differ
diff --git a/spec/fixtures/0.9.9/meta.json b/spec/fixtures/0.9.9/meta.json
new file mode 100644
index 0000000..79e3514
--- /dev/null
+++ b/spec/fixtures/0.9.9/meta.json
@@ -0,0 +1,11 @@
+{
+    "command": "/bin/bash", 
+    "duration": 11.146430015564, 
+    "shell": "/bin/zsh", 
+    "term": {
+        "columns": 96, 
+        "lines": 26, 
+        "type": "screen-256color"
+    }, 
+    "title": "bashing :)"
+}
diff --git a/spec/fixtures/0.9.9/stdout b/spec/fixtures/0.9.9/stdout
new file mode 100644
index 0000000..26374a6
Binary files /dev/null and b/spec/fixtures/0.9.9/stdout differ
diff --git a/spec/fixtures/0.9.9/stdout.time b/spec/fixtures/0.9.9/stdout.time
new file mode 100644
index 0000000..f9e426d
Binary files /dev/null and b/spec/fixtures/0.9.9/stdout.time differ