diff --git a/api/pom.xml b/api/pom.xml
new file mode 100755
index 0000000..4e87df9
--- /dev/null
+++ b/api/pom.xml
@@ -0,0 +1,72 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright 2017-present Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+              xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <artifactId>sadis</artifactId>
+        <groupId>org.opencord</groupId>
+        <version>1.0.0</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>sadis-api</artifactId>
+    <packaging>bundle</packaging>
+
+    <url>http://opencord.org</url>
+
+    <description>Subscriber and Device Information Service API</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onlab-junit</artifactId>
+            <version>${onos.version}</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-core-serializers</artifactId>
+            <version>${onos.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+       <plugins>
+           <plugin>
+               <groupId>org.apache.felix</groupId>
+               <artifactId>maven-bundle-plugin</artifactId>
+               <extensions>true</extensions>
+           </plugin>
+           <plugin>
+		<groupId>org.apache.maven.plugins</groupId>
+		<artifactId>maven-source-plugin</artifactId>
+		<executions>
+	           <execution>
+			<id>attach-sources</id>
+			<goals>
+			   <goal>jar</goal>
+			</goals>
+		   </execution>
+		</executions>
+	   </plugin>
+       </plugins>
+    </build>
+</project>
diff --git a/api/src/main/java/org/opencord/sadis/SubscriberAndDeviceInformation.java b/api/src/main/java/org/opencord/sadis/SubscriberAndDeviceInformation.java
new file mode 100644
index 0000000..2ebe42e
--- /dev/null
+++ b/api/src/main/java/org/opencord/sadis/SubscriberAndDeviceInformation.java
@@ -0,0 +1,258 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.opencord.sadis;
+
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.MacAddress;
+import org.onlab.packet.VlanId;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * Represents a unit of information about a subscriber or access device.
+ */
+public class SubscriberAndDeviceInformation {
+
+    @JsonProperty(value = "id")
+    String id;
+
+    @JsonProperty(value = "sTag")
+    VlanId sTag;
+
+    @JsonProperty(value = "cTag")
+    VlanId cTag;
+
+    @JsonProperty(value = "nasPortId")
+    String nasPortId;
+
+    @JsonProperty(value = "port")
+    int port = -1;
+
+    @JsonProperty(value = "slot")
+    int slot = -1;
+
+    @JsonProperty(value = "hardwareIdentifier")
+    MacAddress hardwareIdentifier;
+
+    @JsonProperty(value = "ipAddress")
+    Ip4Address ipAddress;
+
+    @JsonProperty(value = "nasId")
+    String nasId;
+
+    protected SubscriberAndDeviceInformation() {
+    }
+
+    public final String id() {
+        return this.id;
+    }
+
+    public final void setId(final String id) {
+        this.id = id;
+    }
+
+    public final VlanId sTag() {
+        return this.sTag;
+    }
+
+    public final void setSTag(final VlanId stag) {
+        this.sTag = stag;
+    }
+
+    public final VlanId cTag() {
+        return this.cTag;
+    }
+
+    public final void setCTag(final VlanId ctag) {
+        this.cTag = ctag;
+    }
+
+    public final String nasPortId() {
+        return this.nasPortId;
+    }
+
+    public final void setNasPortId(final String nasPortId) {
+        this.nasPortId = nasPortId;
+    }
+
+    public final int port() {
+        return this.port;
+    }
+
+    public final void setPort(final int port) {
+        this.port = port;
+    }
+
+    public final int slot() {
+        return this.slot;
+    }
+
+    public final void setSlot(final int slot) {
+        this.slot = slot;
+    }
+
+    public final MacAddress hardwareIdentifier() {
+        return this.hardwareIdentifier;
+    }
+
+    public final void setHardwareIdentifier(final MacAddress hardwareIdentifier) {
+        this.hardwareIdentifier = hardwareIdentifier;
+    }
+
+    public final Ip4Address ipAddress() {
+        return this.ipAddress;
+    }
+
+    public final void setIPAddress(final Ip4Address ipAddress) {
+        this.ipAddress = ipAddress;
+    }
+
+    public final String nasId() {
+        return this.nasId;
+    }
+
+    public final void setNasId(final String nasId) {
+        this.nasId = nasId;
+    }
+    /*
+     * (non-Javadoc)
+     *
+     * @see java.lang.Object#hashCode()
+     */
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + (this.cTag == null ? 0 : this.cTag.hashCode());
+        result = prime * result + (this.hardwareIdentifier == null ? 0 : this.hardwareIdentifier.hashCode());
+        result = prime * result + (this.id == null ? 0 : this.id.hashCode());
+        result = prime * result + (this.nasPortId == null ? 0 : this.nasPortId.hashCode());
+        result = prime * result + this.port;
+        result = prime * result + (this.sTag == null ? 0 : this.sTag.hashCode());
+        result = prime * result + this.slot;
+        result = prime * result + (this.ipAddress == null ? 0 : this.ipAddress.hashCode());
+        result = prime * result + (this.nasId == null ? 0 : this.nasId.hashCode());
+        return result;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see java.lang.Object#equals(java.lang.Object)
+     */
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (this.getClass() != obj.getClass()) {
+            return false;
+        }
+        final SubscriberAndDeviceInformation other = (SubscriberAndDeviceInformation) obj;
+        if (this.cTag == null) {
+            if (other.cTag != null) {
+                return false;
+            }
+        } else if (!this.cTag.equals(other.cTag)) {
+            return false;
+        }
+        if (this.hardwareIdentifier == null) {
+            if (other.hardwareIdentifier != null) {
+                return false;
+            }
+        } else if (!this.hardwareIdentifier.equals(other.hardwareIdentifier)) {
+            return false;
+        }
+        if (this.id == null) {
+            if (other.id != null) {
+                return false;
+            }
+        } else if (!this.id.equals(other.id)) {
+            return false;
+        }
+        if (this.nasPortId == null) {
+            if (other.nasPortId != null) {
+                return false;
+            }
+        } else if (!this.nasPortId.equals(other.nasPortId)) {
+            return false;
+        }
+        if (this.nasId == null) {
+            if (other.nasId != null) {
+                return false;
+            }
+        } else if (!this.nasId.equals(other.nasId)) {
+            return false;
+        }
+        if (this.ipAddress == null) {
+            if (other.ipAddress != null) {
+                return false;
+            }
+        } else if (!this.ipAddress.equals(other.ipAddress())) {
+            return false;
+        }
+        if (this.port != other.port) {
+            return false;
+        }
+        if (this.sTag == null) {
+            if (other.sTag != null) {
+                return false;
+            }
+        } else if (!this.sTag.equals(other.sTag)) {
+            return false;
+        }
+        if (this.slot != other.slot) {
+            return false;
+        }
+        return true;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see java.lang.Object#toString()
+     */
+    @Override
+    public String toString() {
+        final StringBuilder buf = new StringBuilder();
+        buf.append('[');
+        buf.append("id:");
+        buf.append(this.id);
+        buf.append(",cTag:");
+        buf.append(this.cTag);
+        buf.append(",sTag:");
+        buf.append(this.sTag);
+        buf.append(",nasPortId:");
+        buf.append(this.nasPortId);
+        buf.append(",port:");
+        buf.append(this.port);
+        buf.append(",slot:");
+        buf.append(this.slot);
+        buf.append(",hardwareIdentifier:");
+        buf.append(this.hardwareIdentifier);
+        buf.append(",ipaddress:");
+        buf.append(this.ipAddress);
+        buf.append(",nasId:");
+        buf.append(this.nasId);
+        buf.append(']');
+
+        return buf.toString();
+    }
+
+}
diff --git a/api/src/main/java/org/opencord/sadis/SubscriberAndDeviceInformationService.java b/api/src/main/java/org/opencord/sadis/SubscriberAndDeviceInformationService.java
new file mode 100644
index 0000000..ad1e313
--- /dev/null
+++ b/api/src/main/java/org/opencord/sadis/SubscriberAndDeviceInformationService.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.opencord.sadis;
+
+/**
+ * Subscriber And Device Information Service.
+ */
+public interface SubscriberAndDeviceInformationService {
+
+    /**
+     * Removes all cached entries.
+     */
+    public void invalidateAll();
+
+    /**
+     * Return the information associated with the given ID.
+     *
+     * @param id
+     *            key to information
+     * @return information associated with ID, if available, else null
+     */
+    public SubscriberAndDeviceInformation get(String id);
+}
diff --git a/api/src/main/java/org/opencord/sadis/package-info.java b/api/src/main/java/org/opencord/sadis/package-info.java
new file mode 100755
index 0000000..be41c22
--- /dev/null
+++ b/api/src/main/java/org/opencord/sadis/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Subscriber and Device Information Service API.
+ */
+package org.opencord.sadis;