diff --git a/Octokit.Reactive/Clients/IObservableRepoCollaboratorsClient.cs b/Octokit.Reactive/Clients/IObservableRepoCollaboratorsClient.cs
index 49deeb9874..6618e1594a 100644
--- a/Octokit.Reactive/Clients/IObservableRepoCollaboratorsClient.cs
+++ b/Octokit.Reactive/Clients/IObservableRepoCollaboratorsClient.cs
@@ -54,6 +54,54 @@ public interface IObservableRepoCollaboratorsClient
         /// <param name="options">Options for changing the API response</param>
         /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
         IObservable<User> GetAll(long repositoryId, ApiOptions options);
+        
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        IObservable<User> GetAll(string owner, string name, RepositoryCollaboratorListRequest request);
+
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="repositoryId">The id of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        IObservable<User> GetAll(long repositoryId, RepositoryCollaboratorListRequest request);
+        
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <param name="options">Options for changing the API response</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        IObservable<User> GetAll(string owner, string name, RepositoryCollaboratorListRequest request, ApiOptions options);
+        
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="repositoryId">The id of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <param name="options">Options for changing the API response</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        IObservable<User> GetAll(long repositoryId, RepositoryCollaboratorListRequest request, ApiOptions options);
 
         /// <summary>
         /// Checks if a user is a collaborator on a repository.
diff --git a/Octokit.Reactive/Clients/ObservableRepoCollaboratorsClient.cs b/Octokit.Reactive/Clients/ObservableRepoCollaboratorsClient.cs
index 719d8614bc..c81c4f89a7 100644
--- a/Octokit.Reactive/Clients/ObservableRepoCollaboratorsClient.cs
+++ b/Octokit.Reactive/Clients/ObservableRepoCollaboratorsClient.cs
@@ -74,7 +74,7 @@ public IObservable<User> GetAll(string owner, string name, ApiOptions options)
             Ensure.ArgumentNotNullOrEmptyString(name, nameof(name));
             Ensure.ArgumentNotNull(options, nameof(options));
 
-            return _connection.GetAndFlattenAllPages<User>(ApiUrls.RepoCollaborators(owner, name), options);
+            return GetAll(owner, name, new RepositoryCollaboratorListRequest(), options);
         }
 
         /// <summary>
@@ -89,8 +89,82 @@ public IObservable<User> GetAll(string owner, string name, ApiOptions options)
         public IObservable<User> GetAll(long repositoryId, ApiOptions options)
         {
             Ensure.ArgumentNotNull(options, nameof(options));
+            
+            return GetAll(repositoryId, new RepositoryCollaboratorListRequest(), options);
+        }
+
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        public IObservable<User> GetAll(string owner, string name, RepositoryCollaboratorListRequest request)
+        {
+            Ensure.ArgumentNotNullOrEmptyString(owner, nameof(owner));
+            Ensure.ArgumentNotNullOrEmptyString(name, nameof(name));
+            Ensure.ArgumentNotNull(request, nameof(request));
+            
+            return GetAll(owner, name, request, ApiOptions.None);
+        }
+
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="repositoryId">The id of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        public IObservable<User> GetAll(long repositoryId, RepositoryCollaboratorListRequest request)
+        {
+            Ensure.ArgumentNotNull(request, nameof(request));
+            
+            return GetAll(repositoryId, request, ApiOptions.None);
+        }
+
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <param name="options">Options for changing the API response</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        public IObservable<User> GetAll(string owner, string name, RepositoryCollaboratorListRequest request, ApiOptions options)
+        {
+            Ensure.ArgumentNotNullOrEmptyString(owner, nameof(owner));
+            Ensure.ArgumentNotNullOrEmptyString(name, nameof(name));
+            Ensure.ArgumentNotNull(request, nameof(request));
+            Ensure.ArgumentNotNull(options, nameof(options));
+
+            return _connection.GetAndFlattenAllPages<User>(ApiUrls.RepoCollaborators(owner, name), request.ToParametersDictionary(), AcceptHeaders.NestedTeamsPreview, options);
+        }
+
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="repositoryId">The id of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <param name="options">Options for changing the API response</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        public IObservable<User> GetAll(long repositoryId, RepositoryCollaboratorListRequest request, ApiOptions options)
+        {
+            Ensure.ArgumentNotNull(request, nameof(request));
+            Ensure.ArgumentNotNull(options, nameof(options));
 
-            return _connection.GetAndFlattenAllPages<User>(ApiUrls.RepoCollaborators(repositoryId), options);
+            return _connection.GetAndFlattenAllPages<User>(ApiUrls.RepoCollaborators(repositoryId), request.ToParametersDictionary(), AcceptHeaders.NestedTeamsPreview, options);
         }
 
         /// <summary>
diff --git a/Octokit.Tests/Clients/RepoCollaboratorsClientTests.cs b/Octokit.Tests/Clients/RepoCollaboratorsClientTests.cs
index edd87c8944..52ddb25ba6 100644
--- a/Octokit.Tests/Clients/RepoCollaboratorsClientTests.cs
+++ b/Octokit.Tests/Clients/RepoCollaboratorsClientTests.cs
@@ -33,7 +33,11 @@ public void RequestsCorrectUrl()
 
                 client.GetAll("owner", "test");
 
-                connection.Received().GetAll<User>(Arg.Is<Uri>(u => u.ToString() == "repos/owner/test/collaborators"), Args.ApiOptions);
+                connection.Received().GetAll<User>(
+                    Arg.Is<Uri>(u => u.ToString() == "repos/owner/test/collaborators"),
+                    Arg.Any<Dictionary<string, string>>(),
+                    "application/vnd.github.hellcat-preview+json",
+                    Args.ApiOptions);
             }
 
             [Fact]
@@ -44,7 +48,11 @@ public void RequestsCorrectUrlWithRepositoryId()
 
                 client.GetAll(1);
 
-                connection.Received().GetAll<User>(Arg.Is<Uri>(u => u.ToString() == "repositories/1/collaborators"), Args.ApiOptions);
+                connection.Received().GetAll<User>(
+                    Arg.Is<Uri>(u => u.ToString() == "repositories/1/collaborators"),
+                    Arg.Any<Dictionary<string, string>>(),
+                    "application/vnd.github.hellcat-preview+json",
+                    Args.ApiOptions);
             }
 
             [Fact]
@@ -63,7 +71,53 @@ public void RequestsCorrectUrlWithApiOptions()
                 client.GetAll("owner", "test", options);
 
                 connection.Received()
-                    .GetAll<User>(Arg.Is<Uri>(u => u.ToString() == "repos/owner/test/collaborators"), options);
+                    .GetAll<User>(Arg.Is<Uri>(u => u.ToString() == "repos/owner/test/collaborators"),
+                        Arg.Any<Dictionary<string, string>>(),
+                        "application/vnd.github.hellcat-preview+json",
+                        options);
+            }
+
+            [Fact]
+            public void RequestsCorrectUrlWithCollaboratorFilter()
+            {
+                var connection = Substitute.For<IApiConnection>();
+                var client = new RepoCollaboratorsClient(connection);
+
+                var request = new RepositoryCollaboratorListRequest();
+
+                client.GetAll("owner", "test", request);
+
+                connection.Received()
+                    .GetAll<User>(Arg.Is<Uri>(u => u.ToString() == "repos/owner/test/collaborators"),
+                        Arg.Is<Dictionary<string, string>>(d => d["affiliation"] == "all"),
+                        "application/vnd.github.hellcat-preview+json",
+                        Args.ApiOptions);
+                
+                request = new RepositoryCollaboratorListRequest
+                {
+                    Affiliation = CollaboratorAffiliation.Direct
+                };
+
+                client.GetAll("owner", "test", request);
+
+                connection.Received()
+                    .GetAll<User>(Arg.Is<Uri>(u => u.ToString() == "repos/owner/test/collaborators"),
+                        Arg.Is<Dictionary<string, string>>(d => d["affiliation"] == "direct"),
+                        "application/vnd.github.hellcat-preview+json",
+                        Args.ApiOptions);
+                
+                request = new RepositoryCollaboratorListRequest
+                {
+                    Affiliation = CollaboratorAffiliation.Outside
+                };
+
+                client.GetAll("owner", "test", request);
+
+                connection.Received()
+                    .GetAll<User>(Arg.Is<Uri>(u => u.ToString() == "repos/owner/test/collaborators"),
+                        Arg.Is<Dictionary<string, string>>(d => d["affiliation"] == "outside"),
+                        "application/vnd.github.hellcat-preview+json",
+                        Args.ApiOptions);
             }
 
             [Fact]
@@ -82,7 +136,57 @@ public void RequestsCorrectUrlWithApiOptionsAndRepositoryId()
                 client.GetAll(1, options);
 
                 connection.Received()
-                    .GetAll<User>(Arg.Is<Uri>(u => u.ToString() == "repositories/1/collaborators"), options);
+                    .GetAll<User>(
+                        Arg.Is<Uri>(u => u.ToString() == "repositories/1/collaborators"),
+                        Arg.Any<Dictionary<string, string>>(),
+                        "application/vnd.github.hellcat-preview+json",
+                        options);
+            }
+
+            [Fact]
+            public void RequestsCorrectUrlWithCollaboratorFilterAndRepositoryId()
+            {
+                var connection = Substitute.For<IApiConnection>();
+                var client = new RepoCollaboratorsClient(connection);
+
+                var request = new RepositoryCollaboratorListRequest();
+                
+                client.GetAll(1, request);
+
+                connection.Received()
+                    .GetAll<User>(
+                        Arg.Is<Uri>(u => u.ToString() == "repositories/1/collaborators"),
+                        Arg.Is<Dictionary<string, string>>(d => d["affiliation"] == "all"),
+                        "application/vnd.github.hellcat-preview+json",
+                        Args.ApiOptions);
+
+                request = new RepositoryCollaboratorListRequest
+                {
+                    Affiliation = CollaboratorAffiliation.Direct
+                };
+
+                client.GetAll(1, request);
+
+                connection.Received()
+                    .GetAll<User>(
+                        Arg.Is<Uri>(u => u.ToString() == "repositories/1/collaborators"),
+                        Arg.Is<Dictionary<string, string>>(d => d["affiliation"] == "direct"),
+                        "application/vnd.github.hellcat-preview+json",
+                        Args.ApiOptions);
+                
+                request = new RepositoryCollaboratorListRequest
+                {
+                    Affiliation = CollaboratorAffiliation.Outside
+                };
+
+                client.GetAll(1, request);
+
+                connection.Received()
+                    .GetAll<User>(
+                        Arg.Is<Uri>(u => u.ToString() == "repositories/1/collaborators"),
+                        Arg.Is<Dictionary<string, string>>(d => d["affiliation"] == "outside"),
+                        "application/vnd.github.hellcat-preview+json",
+                        Args.ApiOptions);
             }
 
             [Fact]
@@ -97,9 +201,11 @@ public async Task EnsuresNonNullArguments()
 
                 await Assert.ThrowsAsync<ArgumentNullException>(() => client.GetAll(null, "test", ApiOptions.None));
                 await Assert.ThrowsAsync<ArgumentNullException>(() => client.GetAll("owner", null, ApiOptions.None));
-                await Assert.ThrowsAsync<ArgumentNullException>(() => client.GetAll("owner", "test", null));
+                await Assert.ThrowsAsync<ArgumentNullException>(() => client.GetAll("owner", "test", options: null));
+                await Assert.ThrowsAsync<ArgumentNullException>(() => client.GetAll("owner", "test", request: null));
 
-                await Assert.ThrowsAsync<ArgumentNullException>(() => client.GetAll(1, null));
+                await Assert.ThrowsAsync<ArgumentNullException>(() => client.GetAll(1, options: null));
+                await Assert.ThrowsAsync<ArgumentNullException>(() => client.GetAll(1, request: null));
             }
         }
 
diff --git a/Octokit.Tests/Reactive/ObservableRepoCollaboratorsClientTests.cs b/Octokit.Tests/Reactive/ObservableRepoCollaboratorsClientTests.cs
index 57d2231981..9eceeadcf6 100644
--- a/Octokit.Tests/Reactive/ObservableRepoCollaboratorsClientTests.cs
+++ b/Octokit.Tests/Reactive/ObservableRepoCollaboratorsClientTests.cs
@@ -39,8 +39,10 @@ public void EnsuresNonNullArguments()
             {
                 Assert.Throws<ArgumentNullException>(() => _client.GetAll(null, name));
                 Assert.Throws<ArgumentNullException>(() => _client.GetAll(owner, null));
-                Assert.Throws<ArgumentNullException>(() => _client.GetAll(owner, name, null));
-                Assert.Throws<ArgumentNullException>(() => _client.GetAll(repositoryId, null));
+                Assert.Throws<ArgumentNullException>(() => _client.GetAll(owner, name, options: null));
+                Assert.Throws<ArgumentNullException>(() => _client.GetAll(repositoryId, options: null));
+                Assert.Throws<ArgumentNullException>(() => _client.GetAll(owner, name, request: null));
+                Assert.Throws<ArgumentNullException>(() => _client.GetAll(repositoryId, request: null));
             }
 
             [Fact]
@@ -67,8 +69,8 @@ public void RequestsCorrectUrl()
                 _client.GetAll(owner, name);
                 _githubClient.Connection.Received(1)
                     .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
-                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 0),
-                        Arg.Any<string>());
+                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 1),
+                        "application/vnd.github.hellcat-preview+json");
             }
 
             [Fact]
@@ -79,8 +81,8 @@ public void RequestsCorrectUrlWithRepositoryId()
                 _client.GetAll(repositoryId);
                 _githubClient.Connection.Received(1)
                     .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
-                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 0),
-                        Arg.Any<string>());
+                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 1),
+                        "application/vnd.github.hellcat-preview+json");
             }
 
             [Fact]
@@ -99,8 +101,8 @@ public void RequestsCorrectUrlWithApiOptions()
                 _client.GetAll(owner, name, options);
                 _githubClient.Connection.Received(1)
                     .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
-                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 2),
-                        null);
+                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 3),
+                        "application/vnd.github.hellcat-preview+json");
 
                 // StartPage is setted => only 1 option (StartPage) in dictionary
                 options = new ApiOptions
@@ -111,8 +113,8 @@ public void RequestsCorrectUrlWithApiOptions()
                 _client.GetAll(owner, name, options);
                 _githubClient.Connection.Received(1)
                     .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
-                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 1),
-                        null);
+                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 2),
+                        "application/vnd.github.hellcat-preview+json");
 
                 // PageCount is setted => none of options in dictionary
                 options = new ApiOptions
@@ -123,8 +125,45 @@ public void RequestsCorrectUrlWithApiOptions()
                 _client.GetAll(owner, name, options);
                 _githubClient.Connection.Received(1)
                     .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
-                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 0),
-                        null);
+                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 1),
+                        "application/vnd.github.hellcat-preview+json");
+            }
+
+            [Fact]
+            public void RequestsCorrectUrlWithCollaboratorFilter()
+            {
+                var expectedUrl = string.Format("repos/{0}/{1}/collaborators", owner, name);
+
+                var request = new RepositoryCollaboratorListRequest();
+
+                _client.GetAll(owner, name, request);
+                _githubClient.Connection.Received(1)
+                    .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
+                        Arg.Is<IDictionary<string, string>>(d => d["affiliation"] == "all"),
+                        "application/vnd.github.hellcat-preview+json");
+
+                request = new RepositoryCollaboratorListRequest
+                {
+                    Affiliation = CollaboratorAffiliation.Direct
+                };
+
+                _client.GetAll(owner, name, request);
+                _githubClient.Connection.Received(1)
+                    .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
+                        Arg.Is<IDictionary<string, string>>(d => d["affiliation"] == "direct"),
+                        "application/vnd.github.hellcat-preview+json");
+
+                // PageCount is setted => none of options in dictionary
+                request = new RepositoryCollaboratorListRequest
+                {
+                    Affiliation = CollaboratorAffiliation.Outside
+                };
+
+                _client.GetAll(owner, name, request);
+                _githubClient.Connection.Received(1)
+                    .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
+                        Arg.Is<IDictionary<string, string>>(d => d["affiliation"] == "outside"),
+                        "application/vnd.github.hellcat-preview+json");
             }
 
             [Fact]
@@ -143,8 +182,8 @@ public void RequestsCorrectUrlWithApiOptionsAndRepositoryId()
                 _client.GetAll(repositoryId, options);
                 _githubClient.Connection.Received(1)
                     .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
-                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 2),
-                        null);
+                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 3),
+                        "application/vnd.github.hellcat-preview+json");
 
                 // StartPage is setted => only 1 option (StartPage) in dictionary
                 options = new ApiOptions
@@ -155,8 +194,8 @@ public void RequestsCorrectUrlWithApiOptionsAndRepositoryId()
                 _client.GetAll(repositoryId, options);
                 _githubClient.Connection.Received(1)
                     .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
-                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 1),
-                        null);
+                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 2),
+                        "application/vnd.github.hellcat-preview+json");
 
                 // PageCount is setted => none of options in dictionary
                 options = new ApiOptions
@@ -167,8 +206,44 @@ public void RequestsCorrectUrlWithApiOptionsAndRepositoryId()
                 _client.GetAll(repositoryId, options);
                 _githubClient.Connection.Received(1)
                     .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
-                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 0),
-                        null);
+                        Arg.Is<IDictionary<string, string>>(dictionary => dictionary.Count == 1),
+                        "application/vnd.github.hellcat-preview+json");
+            }
+
+            [Fact]
+            public void RequestsCorrectUrlWithCollaboratorFilterAndRepositoryId()
+            {
+                var expectedUrl = string.Format("repositories/{0}/collaborators", repositoryId);
+
+                var request = new RepositoryCollaboratorListRequest();
+
+                _client.GetAll(repositoryId, request);
+                _githubClient.Connection.Received(1)
+                    .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
+                        Arg.Is<IDictionary<string, string>>(d => d["affiliation"] == "all"),
+                        "application/vnd.github.hellcat-preview+json");
+
+                request = new RepositoryCollaboratorListRequest
+                {
+                    Affiliation = CollaboratorAffiliation.Direct
+                };
+
+                _client.GetAll(repositoryId, request);
+                _githubClient.Connection.Received(1)
+                    .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
+                        Arg.Is<IDictionary<string, string>>(d => d["affiliation"] == "direct"),
+                        "application/vnd.github.hellcat-preview+json");
+
+                request = new RepositoryCollaboratorListRequest
+                {
+                    Affiliation = CollaboratorAffiliation.Outside
+                };
+
+                _client.GetAll(repositoryId, request);
+                _githubClient.Connection.Received(1)
+                    .Get<List<User>>(Arg.Is<Uri>(u => u.ToString() == expectedUrl),
+                        Arg.Is<IDictionary<string, string>>(d => d["affiliation"] == "outside"),
+                        "application/vnd.github.hellcat-preview+json");
             }
         }
 
diff --git a/Octokit/Clients/IRepoCollaboratorsClient.cs b/Octokit/Clients/IRepoCollaboratorsClient.cs
index 2986795f54..b8f62f313b 100644
--- a/Octokit/Clients/IRepoCollaboratorsClient.cs
+++ b/Octokit/Clients/IRepoCollaboratorsClient.cs
@@ -54,6 +54,54 @@ public interface IRepoCollaboratorsClient
         /// <param name="options">Options for changing the API response</param>
         /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
         Task<IReadOnlyList<User>> GetAll(long repositoryId, ApiOptions options);
+        
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        Task<IReadOnlyList<User>> GetAll(string owner, string name, RepositoryCollaboratorListRequest request);
+
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="repositoryId">The id of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        Task<IReadOnlyList<User>> GetAll(long repositoryId, RepositoryCollaboratorListRequest request);
+        
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <param name="options">Options for changing the API response</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        Task<IReadOnlyList<User>> GetAll(string owner, string name, RepositoryCollaboratorListRequest request, ApiOptions options);
+        
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="repositoryId">The id of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <param name="options">Options for changing the API response</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        Task<IReadOnlyList<User>> GetAll(long repositoryId, RepositoryCollaboratorListRequest request, ApiOptions options);
 
         /// <summary>
         /// Checks if a user is a collaborator on a repository.
diff --git a/Octokit/Clients/RepoCollaboratorsClient.cs b/Octokit/Clients/RepoCollaboratorsClient.cs
index fd3afe2a9a..de9850d108 100644
--- a/Octokit/Clients/RepoCollaboratorsClient.cs
+++ b/Octokit/Clients/RepoCollaboratorsClient.cs
@@ -66,7 +66,7 @@ public Task<IReadOnlyList<User>> GetAll(string owner, string name, ApiOptions op
             Ensure.ArgumentNotNullOrEmptyString(name, nameof(name));
             Ensure.ArgumentNotNull(options, nameof(options));
 
-            return ApiConnection.GetAll<User>(ApiUrls.RepoCollaborators(owner, name), options);
+            return GetAll(owner, name, new RepositoryCollaboratorListRequest(), options);
         }
 
         /// <summary>
@@ -81,8 +81,83 @@ public Task<IReadOnlyList<User>> GetAll(string owner, string name, ApiOptions op
         public Task<IReadOnlyList<User>> GetAll(long repositoryId, ApiOptions options)
         {
             Ensure.ArgumentNotNull(options, nameof(options));
+            
+            return GetAll(repositoryId, new RepositoryCollaboratorListRequest(), options);
+        }
+
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        public Task<IReadOnlyList<User>> GetAll(string owner, string name, RepositoryCollaboratorListRequest request)
+        {
+            Ensure.ArgumentNotNullOrEmptyString(owner, nameof(owner));
+            Ensure.ArgumentNotNullOrEmptyString(name, nameof(name));
+            Ensure.ArgumentNotNull(request, nameof(request));
+            
+            return GetAll(owner, name, request, ApiOptions.None);
+        }
+
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="repositoryId">The id of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        public Task<IReadOnlyList<User>> GetAll(long repositoryId, RepositoryCollaboratorListRequest request)
+        {
+            Ensure.ArgumentNotNull(request, nameof(request));
+            
+            return GetAll(repositoryId, request, ApiOptions.None);
+        }
+
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <param name="options">Options for changing the API response</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        public Task<IReadOnlyList<User>> GetAll(string owner, string name, RepositoryCollaboratorListRequest request, ApiOptions options)
+        {
+            Ensure.ArgumentNotNullOrEmptyString(owner, nameof(owner));
+            Ensure.ArgumentNotNullOrEmptyString(name, nameof(name));
+            Ensure.ArgumentNotNull(request, nameof(request));
+            Ensure.ArgumentNotNull(options, nameof(options));
+
+            return ApiConnection.GetAll<User>(ApiUrls.RepoCollaborators(owner, name), request.ToParametersDictionary(), AcceptHeaders.NestedTeamsPreview, options);
+
+        }
+
+        /// <summary>
+        /// Gets all the collaborators on a repository.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/collaborators/#list">API documentation</a> for more information.
+        /// </remarks>
+        /// <param name="repositoryId">The id of the repository</param>
+        /// <param name="request">Used to request and filter a list of repository collaborators</param>
+        /// <param name="options">Options for changing the API response</param>
+        /// <exception cref="ApiException">Thrown when a general API error occurs.</exception>
+        public Task<IReadOnlyList<User>> GetAll(long repositoryId, RepositoryCollaboratorListRequest request, ApiOptions options)
+        {
+            Ensure.ArgumentNotNull(request, nameof(request));
+            Ensure.ArgumentNotNull(options, nameof(options));
 
-            return ApiConnection.GetAll<User>(ApiUrls.RepoCollaborators(repositoryId), options);
+            return ApiConnection.GetAll<User>(ApiUrls.RepoCollaborators(repositoryId), request.ToParametersDictionary(), AcceptHeaders.NestedTeamsPreview, options);
         }
 
         /// <summary>
diff --git a/Octokit/Models/Request/RepositoryCollaboratorListRequest.cs b/Octokit/Models/Request/RepositoryCollaboratorListRequest.cs
new file mode 100644
index 0000000000..c5fe0682df
--- /dev/null
+++ b/Octokit/Models/Request/RepositoryCollaboratorListRequest.cs
@@ -0,0 +1,57 @@
+using System.Diagnostics;
+using System.Globalization;
+using Octokit.Internal;
+
+namespace Octokit
+{
+    /// <summary>
+    /// Used to request and filter a list of repository collaborators
+    /// </summary>
+    [DebuggerDisplay("{DebuggerDisplay,nq}")]
+    public class RepositoryCollaboratorListRequest : RequestParameters
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="RepositoryCollaboratorListRequest" /> class.
+        /// </summary>
+        public RepositoryCollaboratorListRequest()
+        {
+            Affiliation = CollaboratorAffiliation.All; // Default in accordance with the documentation
+        }
+        
+        /// <summary>
+        /// Gets or sets the collaborator affiliation property.
+        /// </summary>
+        /// <value>
+        /// The collaborator affiliation
+        /// </value>
+        public CollaboratorAffiliation Affiliation { get; set; }
+
+        internal string DebuggerDisplay
+        {
+            get { return string.Format(CultureInfo.InvariantCulture, "Affiliation: {0}", Affiliation); }
+        }
+    }
+
+    /// <summary>
+    /// The collaborator affiliation
+    /// </summary>
+    public enum CollaboratorAffiliation
+    {
+        /// <summary>
+        /// All collaborators the authenticated user can see.
+        /// </summary>
+        [Parameter(Value = "all")]
+        All,
+        /// <summary>
+        /// All collaborators with permissions to an organization-owned repository,
+        /// regardless of organization membership status.
+        /// </summary>
+        [Parameter(Value = "direct")]
+        Direct,
+        /// <summary>
+        /// All outside collaborators of an organization-owned repository.
+        /// </summary>
+        [Parameter(Value = "outside")]
+        Outside
+    }
+}