diff --git a/java/google/registry/rdap/RdapActionBase.java b/java/google/registry/rdap/RdapActionBase.java
index e2d28a23c..f1961ad22 100644
--- a/java/google/registry/rdap/RdapActionBase.java
+++ b/java/google/registry/rdap/RdapActionBase.java
@@ -33,6 +33,7 @@ import com.googlecode.objectify.cmd.Query;
 import google.registry.config.RegistryConfig.Config;
 import google.registry.model.EppResource;
 import google.registry.model.registrar.Registrar;
+import google.registry.rdap.RdapMetrics.EndpointType;
 import google.registry.rdap.RdapSearchResults.IncompletenessWarningType;
 import google.registry.request.Action;
 import google.registry.request.FullServletPath;
@@ -92,6 +93,9 @@ public abstract class RdapActionBase implements Runnable {
   /** Returns a string like "domain name" or "nameserver", used for error strings. */
   abstract String getHumanReadableObjectTypeName();
 
+  /** Returns the endpoint type used for recording metrics. */
+  abstract EndpointType getEndpointType();
+
   /** Returns the servlet action path; used to extract the search string from the incoming path. */
   abstract String getActionPath();
 
@@ -381,23 +385,24 @@ public abstract class RdapActionBase implements Runnable {
    *        the query could not check deletion status (due to Datastore limitations such as the
    *        limit of one field queried for inequality, for instance), it may need to be set to true
    *        even when not including deleted records
-   * @return an {@link RdapResourcesAndIncompletenessWarningType} object containing the list of
+   * @return an {@link RdapResultSet} object containing the list of
    *         resources and an incompleteness warning flag, which is set to MIGHT_BE_INCOMPLETE iff
    *         any resources were excluded due to lack of visibility, and the resulting list of
    *         resources is less than the maximum allowable, which indicates that we may not have
    *         fetched enough resources
    */
-  <T extends EppResource> RdapResourcesAndIncompletenessWarningType<T> getMatchingResources(
+  <T extends EppResource> RdapResultSet<T> getMatchingResources(
       Query<T> query, boolean checkForVisibility, DateTime now) {
     Optional<String> desiredRegistrar = getDesiredRegistrar();
     if (desiredRegistrar.isPresent()) {
       query = query.filter("currentSponsorClientId", desiredRegistrar.get());
     }
     if (!checkForVisibility) {
-      return RdapResourcesAndIncompletenessWarningType.create(query.list());
+      return RdapResultSet.create(query.list());
     }
     // If we are including deleted resources, we need to check that we're authorized for each one.
     List<T> resources = new ArrayList<>();
+    int numResourcesQueried = 0;
     boolean someExcluded = false;
     for (T resource : query) {
       if (shouldBeVisible(resource, now)) {
@@ -405,14 +410,16 @@ public abstract class RdapActionBase implements Runnable {
       } else {
         someExcluded = true;
       }
+      numResourcesQueried++;
       if (resources.size() > rdapResultSetMaxSize) {
         break;
       }
     }
-    return RdapResourcesAndIncompletenessWarningType.create(
+    return RdapResultSet.create(
         resources,
         (someExcluded && (resources.size() < rdapResultSetMaxSize + 1))
             ? IncompletenessWarningType.MIGHT_BE_INCOMPLETE
-            : IncompletenessWarningType.NONE);
+            : IncompletenessWarningType.NONE,
+        numResourcesQueried);
   }
 }
diff --git a/java/google/registry/rdap/RdapAutnumAction.java b/java/google/registry/rdap/RdapAutnumAction.java
index 48a163220..3eba76fab 100644
--- a/java/google/registry/rdap/RdapAutnumAction.java
+++ b/java/google/registry/rdap/RdapAutnumAction.java
@@ -18,6 +18,7 @@ import static google.registry.request.Action.Method.GET;
 import static google.registry.request.Action.Method.HEAD;
 
 import com.google.common.collect.ImmutableMap;
+import google.registry.rdap.RdapMetrics.EndpointType;
 import google.registry.request.Action;
 import google.registry.request.HttpException.NotImplementedException;
 import google.registry.request.auth.Auth;
@@ -46,6 +47,11 @@ public class RdapAutnumAction extends RdapActionBase {
     return "autnum";
   }
 
+  @Override
+  public EndpointType getEndpointType() {
+    return EndpointType.AUTNUM;
+  }
+
   @Override
   public String getActionPath() {
     return PATH;
diff --git a/java/google/registry/rdap/RdapDomainAction.java b/java/google/registry/rdap/RdapDomainAction.java
index ce170d9e0..3b55655ce 100644
--- a/java/google/registry/rdap/RdapDomainAction.java
+++ b/java/google/registry/rdap/RdapDomainAction.java
@@ -24,6 +24,7 @@ import com.google.common.collect.ImmutableMap;
 import google.registry.flows.EppException;
 import google.registry.model.domain.DomainResource;
 import google.registry.rdap.RdapJsonFormatter.OutputDataType;
+import google.registry.rdap.RdapMetrics.EndpointType;
 import google.registry.request.Action;
 import google.registry.request.HttpException.BadRequestException;
 import google.registry.request.HttpException.NotFoundException;
@@ -56,6 +57,11 @@ public class RdapDomainAction extends RdapActionBase {
     return PATH;
   }
 
+  @Override
+  public EndpointType getEndpointType() {
+    return EndpointType.DOMAIN;
+  }
+
   @Override
   public ImmutableMap<String, Object> getJsonObjectForResource(
       String pathSearchString, boolean isHeadRequest) {
diff --git a/java/google/registry/rdap/RdapDomainSearchAction.java b/java/google/registry/rdap/RdapDomainSearchAction.java
index cdacc2f16..e698c2421 100644
--- a/java/google/registry/rdap/RdapDomainSearchAction.java
+++ b/java/google/registry/rdap/RdapDomainSearchAction.java
@@ -34,6 +34,7 @@ import google.registry.model.domain.DomainResource;
 import google.registry.model.host.HostResource;
 import google.registry.rdap.RdapJsonFormatter.BoilerplateType;
 import google.registry.rdap.RdapJsonFormatter.OutputDataType;
+import google.registry.rdap.RdapMetrics.EndpointType;
 import google.registry.rdap.RdapSearchResults.IncompletenessWarningType;
 import google.registry.request.Action;
 import google.registry.request.HttpException.BadRequestException;
@@ -88,6 +89,11 @@ public class RdapDomainSearchAction extends RdapActionBase {
     return "domain search";
   }
 
+  @Override
+  public EndpointType getEndpointType() {
+    return EndpointType.DOMAINS;
+  }
+
   @Override
   public String getActionPath() {
     return PATH;
@@ -468,15 +474,10 @@ public class RdapDomainSearchAction extends RdapActionBase {
     return makeSearchResults(domains, IncompletenessWarningType.NONE, now);
   }
 
-  /** Output JSON from data in an {@link RdapResourcesAndIncompletenessWarningType} object. */
+  /** Output JSON from data in an {@link RdapResultSet} object. */
   private RdapSearchResults makeSearchResults(
-      RdapResourcesAndIncompletenessWarningType<DomainResource>
-          resourcesAndIncompletenessWarningType,
-      DateTime now) {
-    return makeSearchResults(
-        resourcesAndIncompletenessWarningType.resources(),
-        resourcesAndIncompletenessWarningType.incompletenessWarningType(),
-        now);
+      RdapResultSet<DomainResource> resultSet, DateTime now) {
+    return makeSearchResults(resultSet.resources(), resultSet.incompletenessWarningType(), now);
   }
 
   /**
diff --git a/java/google/registry/rdap/RdapEntityAction.java b/java/google/registry/rdap/RdapEntityAction.java
index 7d52c3044..cd742153d 100644
--- a/java/google/registry/rdap/RdapEntityAction.java
+++ b/java/google/registry/rdap/RdapEntityAction.java
@@ -27,6 +27,7 @@ import google.registry.model.contact.ContactResource;
 import google.registry.model.domain.DesignatedContact;
 import google.registry.model.registrar.Registrar;
 import google.registry.rdap.RdapJsonFormatter.OutputDataType;
+import google.registry.rdap.RdapMetrics.EndpointType;
 import google.registry.request.Action;
 import google.registry.request.HttpException.BadRequestException;
 import google.registry.request.HttpException.NotFoundException;
@@ -66,6 +67,11 @@ public class RdapEntityAction extends RdapActionBase {
     return "entity";
   }
 
+  @Override
+  public EndpointType getEndpointType() {
+    return EndpointType.ENTITY;
+  }
+
   @Override
   public String getActionPath() {
     return PATH;
diff --git a/java/google/registry/rdap/RdapEntitySearchAction.java b/java/google/registry/rdap/RdapEntitySearchAction.java
index 780e27336..99b816ee9 100644
--- a/java/google/registry/rdap/RdapEntitySearchAction.java
+++ b/java/google/registry/rdap/RdapEntitySearchAction.java
@@ -31,6 +31,7 @@ import google.registry.model.domain.DesignatedContact;
 import google.registry.model.registrar.Registrar;
 import google.registry.rdap.RdapJsonFormatter.BoilerplateType;
 import google.registry.rdap.RdapJsonFormatter.OutputDataType;
+import google.registry.rdap.RdapMetrics.EndpointType;
 import google.registry.rdap.RdapSearchResults.IncompletenessWarningType;
 import google.registry.request.Action;
 import google.registry.request.HttpException.BadRequestException;
@@ -76,6 +77,11 @@ public class RdapEntitySearchAction extends RdapActionBase {
     return "entity search";
   }
 
+  @Override
+  public EndpointType getEndpointType() {
+    return EndpointType.ENTITIES;
+  }
+
   @Override
   public String getActionPath() {
     return PATH;
@@ -169,12 +175,10 @@ public class RdapEntitySearchAction extends RdapActionBase {
     // Get the contact matches and return the results, fetching an additional contact to detect
     // truncation. Don't bother searching for contacts by name if the request would not be able to
     // see any names anyway.
-    RdapResourcesAndIncompletenessWarningType<ContactResource>
-        resourcesAndIncompletenessWarningType;
+    RdapResultSet<ContactResource> resultSet;
     RdapAuthorization authorization = getAuthorization();
     if (authorization.role() == RdapAuthorization.Role.PUBLIC) {
-      resourcesAndIncompletenessWarningType =
-          RdapResourcesAndIncompletenessWarningType.create(ImmutableList.of());
+      resultSet = RdapResultSet.create(ImmutableList.of());
     } else {
       Query<ContactResource> query =
           queryItems(
@@ -186,9 +190,9 @@ public class RdapEntitySearchAction extends RdapActionBase {
       if (authorization.role() != RdapAuthorization.Role.ADMINISTRATOR) {
         query = query.filter("currentSponsorClientId in", authorization.clientIds());
       }
-      resourcesAndIncompletenessWarningType = getMatchingResources(query, false, now);
+      resultSet = getMatchingResources(query, false, now);
     }
-    return makeSearchResults(resourcesAndIncompletenessWarningType, registrars, now);
+    return makeSearchResults(resultSet, registrars, now);
   }
 
   /**
@@ -264,15 +268,9 @@ public class RdapEntitySearchAction extends RdapActionBase {
    * arguments.
    */
   private RdapSearchResults makeSearchResults(
-      RdapResourcesAndIncompletenessWarningType<ContactResource>
-          resourcesAndIncompletenessWarningType,
-      List<Registrar> registrars,
-      DateTime now) {
+      RdapResultSet<ContactResource> resultSet, List<Registrar> registrars, DateTime now) {
     return makeSearchResults(
-        resourcesAndIncompletenessWarningType.resources(),
-        resourcesAndIncompletenessWarningType.incompletenessWarningType(),
-        registrars,
-        now);
+        resultSet.resources(), resultSet.incompletenessWarningType(), registrars, now);
   }
 
   /**
diff --git a/java/google/registry/rdap/RdapHelpAction.java b/java/google/registry/rdap/RdapHelpAction.java
index 939fa4d08..323521380 100644
--- a/java/google/registry/rdap/RdapHelpAction.java
+++ b/java/google/registry/rdap/RdapHelpAction.java
@@ -20,6 +20,7 @@ import static google.registry.request.Action.Method.HEAD;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import google.registry.rdap.RdapJsonFormatter.BoilerplateType;
+import google.registry.rdap.RdapMetrics.EndpointType;
 import google.registry.request.Action;
 import google.registry.request.auth.Auth;
 import google.registry.util.Clock;
@@ -44,6 +45,11 @@ public class RdapHelpAction extends RdapActionBase {
     return "help";
   }
 
+  @Override
+  public EndpointType getEndpointType() {
+    return EndpointType.HELP;
+  }
+
   @Override
   public String getActionPath() {
     return PATH;
diff --git a/java/google/registry/rdap/RdapIpAction.java b/java/google/registry/rdap/RdapIpAction.java
index 8bfc71845..27ce4a6c8 100644
--- a/java/google/registry/rdap/RdapIpAction.java
+++ b/java/google/registry/rdap/RdapIpAction.java
@@ -18,6 +18,7 @@ import static google.registry.request.Action.Method.GET;
 import static google.registry.request.Action.Method.HEAD;
 
 import com.google.common.collect.ImmutableMap;
+import google.registry.rdap.RdapMetrics.EndpointType;
 import google.registry.request.Action;
 import google.registry.request.HttpException.NotImplementedException;
 import google.registry.request.auth.Auth;
@@ -46,6 +47,11 @@ public class RdapIpAction extends RdapActionBase {
     return "ip";
   }
 
+  @Override
+  public EndpointType getEndpointType() {
+    return EndpointType.IP;
+  }
+
   @Override
   public String getActionPath() {
     return PATH;
diff --git a/java/google/registry/rdap/RdapMetrics.java b/java/google/registry/rdap/RdapMetrics.java
new file mode 100644
index 000000000..7fa9e55a4
--- /dev/null
+++ b/java/google/registry/rdap/RdapMetrics.java
@@ -0,0 +1,31 @@
+// Copyright 2017 The Nomulus Authors. All Rights Reserved.
+//
+// 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 google.registry.rdap;
+
+/** RDAP Instrumentation. */
+public class RdapMetrics {
+
+  enum EndpointType {
+    AUTNUM,
+    DOMAIN,
+    DOMAINS,
+    ENTITY,
+    ENTITIES,
+    HELP,
+    IP,
+    NAMESERVER,
+    NAMESERVERS
+  }
+}
diff --git a/java/google/registry/rdap/RdapNameserverAction.java b/java/google/registry/rdap/RdapNameserverAction.java
index 3559843a2..0d0e0f4a3 100644
--- a/java/google/registry/rdap/RdapNameserverAction.java
+++ b/java/google/registry/rdap/RdapNameserverAction.java
@@ -24,6 +24,7 @@ import com.google.common.collect.ImmutableMap;
 import google.registry.flows.EppException;
 import google.registry.model.host.HostResource;
 import google.registry.rdap.RdapJsonFormatter.OutputDataType;
+import google.registry.rdap.RdapMetrics.EndpointType;
 import google.registry.request.Action;
 import google.registry.request.HttpException.BadRequestException;
 import google.registry.request.HttpException.NotFoundException;
@@ -51,6 +52,11 @@ public class RdapNameserverAction extends RdapActionBase {
     return "nameserver";
   }
 
+  @Override
+  public EndpointType getEndpointType() {
+    return EndpointType.NAMESERVER;
+  }
+
   @Override
   public String getActionPath() {
     return PATH;
diff --git a/java/google/registry/rdap/RdapNameserverSearchAction.java b/java/google/registry/rdap/RdapNameserverSearchAction.java
index a1a9cc88b..42754ab00 100644
--- a/java/google/registry/rdap/RdapNameserverSearchAction.java
+++ b/java/google/registry/rdap/RdapNameserverSearchAction.java
@@ -29,6 +29,7 @@ import google.registry.model.domain.DomainResource;
 import google.registry.model.host.HostResource;
 import google.registry.rdap.RdapJsonFormatter.BoilerplateType;
 import google.registry.rdap.RdapJsonFormatter.OutputDataType;
+import google.registry.rdap.RdapMetrics.EndpointType;
 import google.registry.rdap.RdapSearchResults.IncompletenessWarningType;
 import google.registry.request.Action;
 import google.registry.request.HttpException.BadRequestException;
@@ -75,6 +76,11 @@ public class RdapNameserverSearchAction extends RdapActionBase {
     return "nameserver search";
   }
 
+  @Override
+  public EndpointType getEndpointType() {
+    return EndpointType.NAMESERVERS;
+  }
+
   @Override
   public String getActionPath() {
     return PATH;
@@ -244,17 +250,9 @@ public class RdapNameserverSearchAction extends RdapActionBase {
     return makeSearchResults(getMatchingResources(query, shouldIncludeDeleted(), now), now);
   }
 
-  /**
-   * Output JSON for a lists of hosts contained in an {@link
-   * RdapResourcesAndIncompletenessWarningType}.
-   */
-  private RdapSearchResults makeSearchResults(
-      RdapResourcesAndIncompletenessWarningType<HostResource> resourcesAndIncompletenessWarningType,
-      DateTime now) {
-    return makeSearchResults(
-        resourcesAndIncompletenessWarningType.resources(),
-        resourcesAndIncompletenessWarningType.incompletenessWarningType(),
-        now);
+  /** Output JSON for a lists of hosts contained in an {@link RdapResultSet}. */
+  private RdapSearchResults makeSearchResults(RdapResultSet<HostResource> resultSet, DateTime now) {
+    return makeSearchResults(resultSet.resources(), resultSet.incompletenessWarningType(), now);
   }
 
   /** Output JSON for a list of hosts. */
diff --git a/java/google/registry/rdap/RdapResourcesAndIncompletenessWarningType.java b/java/google/registry/rdap/RdapResultSet.java
similarity index 62%
rename from java/google/registry/rdap/RdapResourcesAndIncompletenessWarningType.java
rename to java/google/registry/rdap/RdapResultSet.java
index 17d6d9f16..d56bb898c 100644
--- a/java/google/registry/rdap/RdapResourcesAndIncompletenessWarningType.java
+++ b/java/google/registry/rdap/RdapResultSet.java
@@ -20,17 +20,18 @@ import google.registry.rdap.RdapSearchResults.IncompletenessWarningType;
 import java.util.List;
 
 @AutoValue
-abstract class RdapResourcesAndIncompletenessWarningType<T extends EppResource> {
+abstract class RdapResultSet<T extends EppResource> {
 
-  static <S extends EppResource> RdapResourcesAndIncompletenessWarningType<S> create(
-      List<S> resources) {
-    return create(resources, IncompletenessWarningType.NONE);
+  static <S extends EppResource> RdapResultSet<S> create(List<S> resources) {
+    return create(resources, IncompletenessWarningType.NONE, resources.size());
   }
 
-  static <S extends EppResource> RdapResourcesAndIncompletenessWarningType<S> create(
-      List<S> resources, IncompletenessWarningType incompletenessWarningType) {
-    return new AutoValue_RdapResourcesAndIncompletenessWarningType<>(
-        resources, incompletenessWarningType);
+  static <S extends EppResource> RdapResultSet<S> create(
+      List<S> resources,
+      IncompletenessWarningType incompletenessWarningType,
+      int numResourcesRetrieved) {
+    return new AutoValue_RdapResultSet<>(
+        resources, incompletenessWarningType, numResourcesRetrieved);
   }
 
   /** List of EPP resources. */
@@ -38,5 +39,8 @@ abstract class RdapResourcesAndIncompletenessWarningType<T extends EppResource>
 
   /** Type of warning to display regarding possible incomplete data. */
   abstract IncompletenessWarningType incompletenessWarningType();
+
+  /** Number of resources retrieved from the database in the process of assembling the data set. */
+  abstract int numResourcesRetrieved();
 }
 
diff --git a/javatests/google/registry/rdap/RdapActionBaseTest.java b/javatests/google/registry/rdap/RdapActionBaseTest.java
index 7c6257a2d..bbac23c6d 100644
--- a/javatests/google/registry/rdap/RdapActionBaseTest.java
+++ b/javatests/google/registry/rdap/RdapActionBaseTest.java
@@ -25,6 +25,7 @@ import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import google.registry.model.ofy.Ofy;
 import google.registry.rdap.RdapJsonFormatter.BoilerplateType;
+import google.registry.rdap.RdapMetrics.EndpointType;
 import google.registry.testing.AppEngineRule;
 import google.registry.testing.FakeClock;
 import google.registry.testing.FakeResponse;
@@ -64,6 +65,11 @@ public class RdapActionBaseTest {
       return "human-readable string";
     }
 
+    @Override
+    public EndpointType getEndpointType() {
+      return EndpointType.HELP;
+    }
+
     @Override
     public String getActionPath() {
       return PATH;