diff --git a/apps/inbandtelemetry/api/src/main/java/org/onosproject/inbandtelemetry/api/IntIntent.java b/apps/inbandtelemetry/api/src/main/java/org/onosproject/inbandtelemetry/api/IntIntent.java
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+++ b/apps/inbandtelemetry/api/src/main/java/org/onosproject/inbandtelemetry/api/IntIntent.java
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+/*
+ * Copyright 2015-present Open Networking Foundation
+ *
+ * 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.onosproject.inbandtelemetry.api;
+
+import com.google.common.annotations.Beta;
+import org.onosproject.net.flow.DefaultTrafficSelector;
+import org.onosproject.net.flow.TrafficSelector;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Represents an INT monitoring intent. Each intent is made up of a traffic slice
+ * to be monitored, as a form of TrafficSelector, types of metadata to collect,
+ * and other required parameters (INT header type, INT Report type, and Telemetry mode).
+ *
+ * IntIntent is converted to a set of flow rules to be installed on each INT-capable
+ * switch in the network, by IntService.
+ *
+ * Terminologies and descriptions are borrowed from INT specification.
+ *
+ * @see <a href="https://github.com/p4lang/p4-applications/blob/master/docs/INT.pdf">
+ *     INT sepcification</a>
+ */
+@Beta
+public final class IntIntent {
+    /**
+     * Represents a type of INT metadata.
+     */
+    public enum IntMetadataType {
+        /**
+         * The unique ID of a switch.
+         */
+        SWITCH_ID,
+        /**
+         * The ports on which the INT packet was received and sent out.
+         */
+        L1_PORT_ID,
+        /**
+         * Time taken for the INT packet to be switched within the device.
+         */
+        HOP_LATENCY,
+        /**
+         * The build-up of traffic in the queue that the INT packet observes
+         * in the device while being forwarded.
+         */
+        QUEUE_OCCUPANCY,
+        /**
+         * The device local time when the INT packet was received on the ingress port.
+         */
+        INGRESS_TIMESTAMP,
+        /**
+         * The device local time when the INT packet was processed by the egress port.
+         */
+        EGRESS_TIMESTAMP,
+        /**
+         * The logical ports on which the INT packet was received and sent out.
+         */
+        L2_PORT_ID,
+        /**
+         * Current utilization of the egress port via witch the INT packet was sent out.
+         */
+        EGRESS_TX_UTIL
+    }
+
+    /**
+     * Represents an INT header type.
+     */
+    public enum IntHeaderType {
+        /**
+         * Intemediate devices must process this type of INT header.
+         */
+        HOP_BY_HOP,
+        /**
+         * Intemediate devices must ignore this type of INT header.
+         */
+        DESTINATION
+    }
+
+    /**
+     * Represents a type of telemetry report.
+     */
+    public enum IntReportType {
+        /**
+         * Report for flows matching certain definitions.
+         */
+        TRACKED_FLOW,
+        /**
+         * Reports for all dropeed packets matching a drop watchlist.
+         */
+        DROPPED_PACKET,
+        /**
+         * Reports for traffic entering a specific queue during a period of queue congestion.
+         */
+        CONGESTED_QUEUE
+    }
+
+    /**
+     * Represents telemetry mode.
+     */
+    public enum TelemetryMode {
+        /**
+         * Each network device generates its own telemetry reports.
+         */
+        POSTCARD,
+        /**
+         * Telemetry metadata is embedded in between the original
+         * headers of data packets as they traverse the network.
+         */
+        INBAND_TELEMETRY
+    }
+
+    private static final int DEFAULT_PRIORITY = 10;
+
+    // TrafficSelector to describe target flows to monitor
+    private final TrafficSelector selector;
+    // set of metadata type to collect
+    private final Set<IntMetadataType> metadataTypes;
+    // hop-by-hop or destination
+    private final IntHeaderType headerType;
+    // telemetry report types
+    private final Set<IntReportType> reportTypes;
+    // telemetry mode
+    private final TelemetryMode telemetryMode;
+
+    /**
+     * Creates an IntIntent.
+     *
+     * @param selector      the traffic selector that identifies traffic to enable INT
+     * @param metadataTypes the types of metadata to collect
+     * @param headerType    the type of INT header
+     * @param reportTypes   the types of report to be generated
+     * @param telemetryMode the telemetry mode
+     */
+    private IntIntent(TrafficSelector selector, Set<IntMetadataType> metadataTypes,
+                      IntHeaderType headerType, Set<IntReportType> reportTypes,
+                      TelemetryMode telemetryMode) {
+        this.selector = selector;
+        this.metadataTypes = new HashSet<>(metadataTypes);
+        this.headerType = headerType;
+        this.reportTypes = new HashSet<>(reportTypes);
+        this.telemetryMode = telemetryMode;
+    }
+
+    /**
+     * Returns traffic selector of this intent.
+     *
+     * @return traffic selector
+     */
+    public TrafficSelector selector() {
+        return selector;
+    }
+
+    /**
+     * Returns a set of metadata type to be collected by this intent.
+     *
+     * @return set of metadata type
+     */
+    public Set<IntMetadataType> metadataTypes() {
+        return metadataTypes;
+    }
+
+    /**
+     * Returns a INT header type specified in this intent.
+     *
+     * @return INT header type
+     */
+    public IntHeaderType headerType() {
+        return headerType;
+    }
+
+    /**
+     * Returns a set of report type to be generated.
+     *
+     * @return set of report type
+     */
+    public Set<IntReportType> reportTypes() {
+        return reportTypes;
+    }
+
+    /**
+     * Returns a telemetry mode specified in this intent.
+     *
+     * @return telemtry mode
+     */
+    public TelemetryMode telemetryMode() {
+        return telemetryMode;
+    }
+
+    /**
+     * Returns a new builder.
+     *
+     * @return new builder
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * An IntIntent builder.
+     */
+    public static final class Builder {
+        private TrafficSelector selector = DefaultTrafficSelector.emptySelector();
+        private Set<IntMetadataType> metadataTypes = new HashSet<>();
+        private IntHeaderType headerType = IntHeaderType.HOP_BY_HOP;
+        private Set<IntReportType> reportTypes = new HashSet<>();
+        private TelemetryMode telemetryMode = TelemetryMode.INBAND_TELEMETRY;
+
+        /**
+         * Assigns a selector to the IntIntent.
+         *
+         * @param selector a traffic selector
+         * @return an IntIntent builder
+         */
+        public IntIntent.Builder withSelector(TrafficSelector selector) {
+            this.selector = selector;
+            return this;
+        }
+
+        /**
+         * Add a metadata type to the IntIntent.
+         *
+         * @param metadataType a type of metadata to collect
+         * @return an IntIntent builder
+         */
+        public IntIntent.Builder withMetadataType(IntMetadataType metadataType) {
+            this.metadataTypes.add(metadataType);
+            return this;
+        }
+
+        /**
+         * Assigns a header type to the IntIntent.
+         *
+         * @param headerType a header type
+         * @return an IntIntent builder
+         */
+        public IntIntent.Builder withHeaderType(IntHeaderType headerType) {
+            this.headerType = headerType;
+            return this;
+        }
+
+        /**
+         * Add a report type to the IntIntent.
+         *
+         * @param reportType a type of report
+         * @return an IntIntent builder
+         */
+        public IntIntent.Builder withReportType(IntReportType reportType) {
+            this.reportTypes.add(reportType);
+            return this;
+        }
+
+        /**
+         * Assigns a telemetry mode to the IntIntent.
+         *
+         * @param telemetryMode a telemetry mode
+         * @return an IntIntent builder
+         */
+        public IntIntent.Builder withTelemetryMode(TelemetryMode telemetryMode) {
+            this.telemetryMode = telemetryMode;
+            return this;
+        }
+
+        /**
+         * Builds the IntIntent.
+         *
+         * @return an IntIntent
+         */
+        public IntIntent build() {
+            checkArgument(!selector.criteria().isEmpty(), "Empty selector cannot match any flow.");
+            checkArgument(!metadataTypes.isEmpty(), "Metadata types cannot be empty.");
+            checkNotNull(headerType, "Header type cannot be null.");
+            checkNotNull(!reportTypes.isEmpty(), "Report types cannot be empty.");
+            checkNotNull(telemetryMode, "Telemetry mode cannot be null.");
+
+            return new IntIntent(selector, metadataTypes, headerType, reportTypes, telemetryMode);
+        }
+    }
+}