diff --git a/Octokit.Reactive/Clients/IObservablePullRequestsClient.cs b/Octokit.Reactive/Clients/IObservablePullRequestsClient.cs
index 35329341..9808297f 100644
--- a/Octokit.Reactive/Clients/IObservablePullRequestsClient.cs
+++ b/Octokit.Reactive/Clients/IObservablePullRequestsClient.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Reactive;
+using System.Threading.Tasks;
 
 namespace Octokit
 {
@@ -62,5 +63,16 @@ namespace Octokit
         /// </param>
         /// <returns></returns>
         IObservable<PullRequest> Update(string owner, string name, int number, PullRequestUpdate pullRequestUpdate);
+
+        /// <summary>
+        /// Merges a pull request.
+        /// </summary>
+        /// <remarks>http://developer.github.com/v3/pulls/#merge-a-pull-request-merge-buttontrade</remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="number">The pull request number</param>
+        /// <param name="mergePullRequest">A <see cref="MergePullRequest"/> instance describing a pull request merge</param>
+        /// <returns></returns>
+        IObservable<PullRequestMerge> Merge(string owner, string name, int number, MergePullRequest mergePullRequest);
     }
 }
diff --git a/Octokit.Reactive/Clients/ObservablePullRequestsClient.cs b/Octokit.Reactive/Clients/ObservablePullRequestsClient.cs
index e0b316b7..cce9e34d 100644
--- a/Octokit.Reactive/Clients/ObservablePullRequestsClient.cs
+++ b/Octokit.Reactive/Clients/ObservablePullRequestsClient.cs
@@ -102,5 +102,23 @@ namespace Octokit.Reactive.Clients
 
             return _client.Update(owner, name, number, pullRequestUpdate).ToObservable();
         }
+
+        /// <summary>
+        /// Merges a pull request.
+        /// </summary>
+        /// <remarks>http://developer.github.com/v3/pulls/#merge-a-pull-request-merge-buttontrade</remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="number">The pull request number</param>
+        /// <param name="mergePullRequest">A <see cref="MergePullRequest"/> instance describing a pull request merge</param>
+        /// <returns></returns>
+        public IObservable<PullRequestMerge> Merge(string owner, string name, int number, MergePullRequest mergePullRequest) 
+        {
+            Ensure.ArgumentNotNullOrEmptyString(owner, "owner");
+            Ensure.ArgumentNotNullOrEmptyString(name, "name");
+            Ensure.ArgumentNotNull(mergePullRequest, "mergePullRequest");
+
+            return _client.Merge(owner, name, number, mergePullRequest).ToObservable();
+        }
     }
 }
\ No newline at end of file
diff --git a/Octokit/Clients/IPullRequestsClient.cs b/Octokit/Clients/IPullRequestsClient.cs
index 5bebb732..c1b088b7 100644
--- a/Octokit/Clients/IPullRequestsClient.cs
+++ b/Octokit/Clients/IPullRequestsClient.cs
@@ -61,5 +61,16 @@ namespace Octokit
         /// </param>
         /// <returns></returns>
         Task<PullRequest> Update(string owner, string name, int number, PullRequestUpdate pullRequestUpdate);
+
+        /// <summary>
+        /// Merges a pull request.
+        /// </summary>
+        /// <remarks>http://developer.github.com/v3/pulls/#merge-a-pull-request-merge-buttontrade</remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="number">The pull request number</param>
+        /// <param name="mergePullRequest">A <see cref="MergePullRequest"/> instance describing a pull request merge</param>
+        /// <returns></returns>
+        Task<PullRequestMerge> Merge(string owner, string name, int number, MergePullRequest mergePullRequest);
     }
 }
diff --git a/Octokit/Clients/PullRequestsClient.cs b/Octokit/Clients/PullRequestsClient.cs
index 5bf55e59..e379cbba 100644
--- a/Octokit/Clients/PullRequestsClient.cs
+++ b/Octokit/Clients/PullRequestsClient.cs
@@ -95,5 +95,23 @@ namespace Octokit
 
             return ApiConnection.Patch<PullRequest>(ApiUrls.PullRequest(owner, name, number), pullRequestUpdate);
         }
+
+        /// <summary>
+        /// Merges a pull request.
+        /// </summary>
+        /// <remarks>http://developer.github.com/v3/pulls/#merge-a-pull-request-merge-buttontrade</remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="number">The pull request number</param>
+        /// <param name="mergePullRequest">A <see cref="MergePullRequest"/> instance describing a pull request merge</param>
+        /// <returns></returns>
+        public Task<PullRequestMerge> Merge(string owner, string name, int number, MergePullRequest mergePullRequest) 
+        {
+            Ensure.ArgumentNotNullOrEmptyString(owner, "owner");
+            Ensure.ArgumentNotNullOrEmptyString(name, "name");
+            Ensure.ArgumentNotNull(mergePullRequest, "mergePullRequest");
+
+            return ApiConnection.Put<PullRequestMerge>(ApiUrls.PullRequest(owner, name, number), mergePullRequest);
+        }
     }
 }
diff --git a/Octokit/Models/Request/MergePullRequest.cs b/Octokit/Models/Request/MergePullRequest.cs
new file mode 100644
index 00000000..d59e04ad
--- /dev/null
+++ b/Octokit/Models/Request/MergePullRequest.cs
@@ -0,0 +1,22 @@
+using System;
+
+namespace Octokit
+{
+    /// <summary>
+    /// Used to merge a pull request.
+    /// </summary>
+    public class MergePullRequest
+    {
+        public MergePullRequest(string message)
+        {
+            Ensure.ArgumentNotNull(message, "message");
+
+            Message = message;
+        }
+
+        /// <summary>
+        /// The message that will be used for the merge commit (optional)
+        /// </summary>
+        public string Message { get; private set; }
+    }
+}
diff --git a/Octokit/Models/Response/PullRequestMerge.cs b/Octokit/Models/Response/PullRequestMerge.cs
new file mode 100644
index 00000000..475ad974
--- /dev/null
+++ b/Octokit/Models/Response/PullRequestMerge.cs
@@ -0,0 +1,22 @@
+using System;
+
+namespace Octokit
+{
+    public class PullRequestMerge
+    {
+        /// <summary>
+        /// The sha reference of the commit.
+        /// </summary>
+        public string sha { get; set; }
+
+        /// <summary>
+        /// True if merged successfully, otherwise false.
+        /// </summary>
+        public bool Merged { get; set; }
+
+        /// <summary>
+        /// The message that will be used for the merge commit.
+        /// </summary>
+        public string Message { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/Octokit/Octokit-Mono.csproj b/Octokit/Octokit-Mono.csproj
index cc5f23f8..70cd4fd0 100644
--- a/Octokit/Octokit-Mono.csproj
+++ b/Octokit/Octokit-Mono.csproj
@@ -86,6 +86,7 @@
     <Compile Include="Helpers\ParameterAttribute.cs" />
     <Compile Include="Helpers\ReflectionExtensions.cs" />
     <Compile Include="Models\Request\LabelUpdate.cs" />
+    <Compile Include="Models\Request\MergePullRequest.cs" />
     <Compile Include="Models\Request\MilestoneUpdate.cs" />
     <Compile Include="Models\Request\NewBlob.cs" />
     <Compile Include="Models\Request\NewCommit.cs" />
diff --git a/Octokit/Octokit-MonoAndroid.csproj b/Octokit/Octokit-MonoAndroid.csproj
index 259d8000..89fa5bfb 100644
--- a/Octokit/Octokit-MonoAndroid.csproj
+++ b/Octokit/Octokit-MonoAndroid.csproj
@@ -113,7 +113,9 @@
     <Compile Include="Models\Response\Notification.cs" />
     <Compile Include="Models\Response\NotificationInfo.cs" />
     <Compile Include="Models\Response\PullRequest.cs" />
+    <Compile Include="Models\Response\PullRequestMerge.cs" />
     <Compile Include="Models\Request\RepositoryIssueRequest.cs" />
+    <Compile Include="Models\Request\MergePullRequest.cs" />
     <Compile Include="Models\Request\MilestoneRequest.cs" />
     <Compile Include="Models\Response\TagObject.cs" />
     <Compile Include="Models\Response\TreeItem.cs" />
diff --git a/Octokit/Octokit-Monotouch.csproj b/Octokit/Octokit-Monotouch.csproj
index f3e15fec..23aa80e3 100644
--- a/Octokit/Octokit-Monotouch.csproj
+++ b/Octokit/Octokit-Monotouch.csproj
@@ -108,7 +108,9 @@
     <Compile Include="Models\Response\Notification.cs" />
     <Compile Include="Models\Response\NotificationInfo.cs" />
     <Compile Include="Models\Response\PullRequest.cs" />
+    <Compile Include="Models\Response\PullRequestMerge.cs" />
     <Compile Include="Models\Request\RepositoryIssueRequest.cs" />
+    <Compile Include="Models\Request\MergePullRequest.cs" />
     <Compile Include="Models\Request\MilestoneRequest.cs" />
     <Compile Include="Models\Response\TagObject.cs" />
     <Compile Include="Models\Response\TreeItem.cs" />
diff --git a/Octokit/Octokit.csproj b/Octokit/Octokit.csproj
index bcc1af8d..92f2a2a2 100644
--- a/Octokit/Octokit.csproj
+++ b/Octokit/Octokit.csproj
@@ -136,6 +136,7 @@
     <Compile Include="Helpers\ReflectionExtensions.cs" />
     <Compile Include="Models\Request\NewTeam.cs" />
     <Compile Include="Models\Request\UpdateTeam.cs" />
+    <Compile Include="Models\Request\MergePullRequest.cs" />
     <Compile Include="Models\Request\MilestoneUpdate.cs" />
     <Compile Include="Models\Request\NewCommit.cs" />
     <Compile Include="Models\Request\NewCommitStatus.cs" />