diff --git a/src/Cronofy/Attachment.cs b/src/Cronofy/Attachment.cs
new file mode 100644
index 0000000..f478e56
--- /dev/null
+++ b/src/Cronofy/Attachment.cs
@@ -0,0 +1,98 @@
+namespace Cronofy
+{
+    using Newtonsoft.Json;
+
+    /// <summary>
+    /// Class for the deserialization of an attachment summary
+    /// response.
+    /// </summary>
+    public sealed class Attachment
+    {
+        /// <summary>
+        /// Gets or sets the attachment ID.
+        /// </summary>
+        /// <value>
+        /// The ID of the attachment.
+        /// </value>
+        [JsonProperty("attachment_id")]
+        public string AttachmentId { get; set; }
+
+        /// <summary>
+        /// Gets or sets the file name for the attachment.
+        /// </summary>
+        /// <value>
+        /// The file name for the attachment.
+        /// </value>
+        [JsonProperty("file_name")]
+        public string FileName { get; set; }
+
+        /// <summary>
+        /// Gets or sets the MIME content type for the attachment.
+        /// </summary>
+        /// <value>
+        /// The MIME content type for the attachment.
+        /// </value>
+        [JsonProperty("content_type")]
+        public string ContentType { get; set; }
+
+        /// <summary>
+        /// Gets or sets the MD5 hash of the attachment content.
+        /// </summary>
+        /// <value>
+        /// The MD5 hash of the attachment content.
+        /// </value>
+        [JsonProperty("md5")]
+        public string MD5 { get; set; }
+
+        /// <inheritdoc/>
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj))
+            {
+                return false;
+            }
+
+            if (ReferenceEquals(this, obj))
+            {
+                return true;
+            }
+
+            return obj is Attachment && this.Equals((Attachment)obj);
+        }
+
+        /// <inheritdoc/>
+        public override int GetHashCode()
+        {
+            return this.AttachmentId.GetHashCode();
+        }
+
+        /// <summary>
+        /// Determines whether the specified <see cref="Cronofy.Attachment"/>
+        /// is equal to the current <see cref="Cronofy.Attachment"/>.
+        /// </summary>
+        /// <param name="other">
+        /// The <see cref="Cronofy.Attachment"/> to compare with the current
+        /// <see cref="Cronofy.Attachment"/>.
+        /// </param>
+        /// <returns>
+        /// <c>true</c> if the specified <see cref="Cronofy.Attachment"/> is
+        /// equal to the current <see cref="Cronofy.Attachment"/>; otherwise,
+        /// <c>false</c>.
+        /// </returns>
+        public bool Equals(Attachment other)
+        {
+            return this.AttachmentId == other.AttachmentId && this.FileName == other.FileName
+             && this.ContentType == other.ContentType && this.MD5 == other.MD5;
+        }
+
+        /// <inheritdoc/>
+        public override string ToString()
+        {
+            return string.Format(
+                "<{0} AttachmentId={1}, FileName={2}>",
+                this.GetType(),
+                this.AttachmentId,
+                this.FileName);
+        }
+    }
+}
diff --git a/src/Cronofy/CronofyOAuthClient.cs b/src/Cronofy/CronofyOAuthClient.cs
index e941096..de9f240 100644
--- a/src/Cronofy/CronofyOAuthClient.cs
+++ b/src/Cronofy/CronofyOAuthClient.cs
@@ -518,6 +518,28 @@ public ElementToken GetElementToken(ElementTokenRequest elementTokenRequest)
             return elementTokenResponse.ToElementToken();
         }
 
+        /// <inheritdoc/>
+        public Attachment CreateAttachment(CreateAttachmentRequest createAttachmentRequest)
+        {
+            Preconditions.NotNull(nameof(createAttachmentRequest), createAttachmentRequest);
+            Preconditions.NotEmpty(nameof(createAttachmentRequest.FileName), createAttachmentRequest.FileName);
+            Preconditions.NotEmpty(nameof(createAttachmentRequest.ContentType), createAttachmentRequest.ContentType);
+            Preconditions.NotEmpty(nameof(createAttachmentRequest.Base64Content), createAttachmentRequest.Base64Content);
+
+            var request = new HttpRequest
+            {
+                Method = "POST",
+                Url = this.urlProvider.AttachmentsUrl,
+            };
+
+            request.AddOAuthAuthorization(this.clientSecret);
+            request.SetJsonBody(createAttachmentRequest);
+
+            var attachmentResponse = this.HttpClient.GetJsonResponse<AttachmentResponse>(request);
+
+            return attachmentResponse.ToAttachment();
+        }
+
         /// <summary>
         /// Builder class for authorization URLs.
         /// </summary>
diff --git a/src/Cronofy/ICronofyOAuthClient.cs b/src/Cronofy/ICronofyOAuthClient.cs
index 6dc14f1..19e70e8 100644
--- a/src/Cronofy/ICronofyOAuthClient.cs
+++ b/src/Cronofy/ICronofyOAuthClient.cs
@@ -396,5 +396,7 @@ public interface ICronofyOAuthClient
         /// Thrown if <paramref name="redirectUri"/> is null or empty.
         /// </exception>
         IAuthorizationUrlBuilder GetEnterpriseConnectAuthorizationUrlBuilder(string redirectUri);
+
+        Attachment CreateAttachment(CreateAttachmentRequest createAttachmentRequest);
     }
 }
diff --git a/src/Cronofy/Requests/CreateAttachmentRequest.cs b/src/Cronofy/Requests/CreateAttachmentRequest.cs
new file mode 100644
index 0000000..ec94077
--- /dev/null
+++ b/src/Cronofy/Requests/CreateAttachmentRequest.cs
@@ -0,0 +1,86 @@
+namespace Cronofy.Requests
+{
+    using Newtonsoft.Json;
+    using System.Collections.Generic;
+
+    /// <summary>
+    /// Class for the serialization of a create attachment request.
+    /// </summary>
+    public sealed class CreateAttachmentRequest
+    {
+        /// <summary>
+        /// Gets or sets the file name for the attachment.
+        /// </summary>
+        /// <value>
+        /// The file name for the attachment.
+        /// </value>
+        [JsonProperty("file_name")]
+        public string FileName { get; set; }
+
+        /// <summary>
+        /// Gets or sets the MIME content type for the attachment.
+        /// </summary>
+        /// <value>
+        /// The MIME content type for the attachment.
+        /// </value>
+        [JsonProperty("content_type")]
+        public string ContentType { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Base64-encoded content of the attachment.
+        /// </summary>
+        /// <value>
+        /// The Base64-encoded content of the attachment.
+        /// </value>
+        [JsonProperty("base64_content")]
+        public string Base64Content { get; set; }
+
+        /// <summary>
+        /// Class for the serialization of attachment subscriptions.
+        /// </summary>
+        public sealed class RequestSubscription
+        {
+            /// <summary>
+            /// Gets or sets the type of the subscription.
+            /// </summary>
+            /// <value>
+            /// The type of the subscription.
+            /// </value>
+            [JsonProperty("type")]
+            public string Type { get; set; }
+
+            /// <summary>
+            /// Gets or sets the destination URI Cronofy will call when the subscription is triggered.
+            /// </summary>
+            /// <value>
+            /// The destination URI Cronofy will call when the subscription is triggered.
+            /// </value>
+            [JsonProperty("uri")]
+            public string Uri { get; set; }
+
+            /// <summary>
+            /// Gets or sets the interactions subscribed to.
+            /// </summary>
+            /// <value>
+            /// The interactions subscribed to.
+            /// </value>
+            [JsonProperty("interactions")]
+            public IEnumerable<Interaction> Interactions { get; set; }
+
+            /// <summary>
+            /// Class for the serialization of event subscription interactions.
+            /// </summary>
+            public sealed class Interaction
+            {
+                /// <summary>
+                /// Gets or sets the type of the interaction.
+                /// </summary>
+                /// <value>
+                /// The type of the interaction.
+                /// </value>
+                [JsonProperty("type")]
+                public string Type { get; set; }
+            }
+        }
+    }
+}
diff --git a/src/Cronofy/Responses/AttachmentResponse.cs b/src/Cronofy/Responses/AttachmentResponse.cs
new file mode 100644
index 0000000..ad9d41c
--- /dev/null
+++ b/src/Cronofy/Responses/AttachmentResponse.cs
@@ -0,0 +1,48 @@
+namespace Cronofy.Responses
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+    using Newtonsoft.Json;
+
+    /// <summary>
+    /// Class for the deserialization of an availability response.
+    /// </summary>
+    internal sealed class AttachmentResponse
+    {
+        /// <summary>
+        /// Gets or sets the available periods of the response.
+        /// </summary>
+        /// <value>
+        /// The available periods of the response.
+        /// </value>
+        [JsonProperty("attachment")]
+        public AttachmentSummary Attachment { get; set; }
+
+        internal sealed class AttachmentSummary
+        {
+            [JsonProperty("attachment_id")]
+            public string AttachmentId { get; set; }
+
+            [JsonProperty("file_name")]
+            public string FileName { get; set; }
+
+            [JsonProperty("content_type")]
+            public string ContentType { get; set; }
+
+            [JsonProperty("md5")]
+            public string MD5 { get; set; }
+        }
+
+        public Attachment ToAttachment()
+        {
+            return new Attachment
+            {
+                AttachmentId = this.Attachment.AttachmentId,
+                FileName = this.Attachment.FileName,
+                ContentType = this.Attachment.ContentType,
+                MD5 = this.Attachment.MD5,
+            };
+        }
+    }
+}
diff --git a/src/Cronofy/UrlProvider.cs b/src/Cronofy/UrlProvider.cs
index 8f0c50f..130dbbb 100644
--- a/src/Cronofy/UrlProvider.cs
+++ b/src/Cronofy/UrlProvider.cs
@@ -170,6 +170,11 @@ public sealed class UrlProvider
         /// </summary>
         private const string ConferencingServiceAuthorizationUrlFormat = "https://api{0}.cronofy.com/v1/conferencing_service_authorizations";
 
+        /// <summary>
+        /// The URL of the Attachments endpoint.
+        /// </summary>
+        private const string AttachmentsUrlFormat = "https://api{0}.cronofy.com/v1/attachments";
+
         /// <summary>
         /// Initializes a new instance of the <see cref="UrlProvider"/> class.
         /// </summary>
@@ -218,6 +223,7 @@ internal UrlProvider(string dataCenter)
             this.ProvisionApplicationUrl = string.Format(ProvisionApplicationUrlFormat, suffix);
             this.ElementTokensUrl = string.Format(ElementTokensUrlFormat, suffix);
             this.ConferencingServiceAuthorizationUrl = string.Format(ConferencingServiceAuthorizationUrlFormat, suffix);
+            this.AttachmentsUrl = string.Format(AttachmentsUrlFormat, suffix);
         }
 
         /// <summary>
@@ -567,5 +573,11 @@ public string BatchUrl
         /// </summary>
         /// <value>The conferencing service authorization URL.</value>
         public string ConferencingServiceAuthorizationUrl { get; private set; }
+
+        /// <summary>
+        /// Gets the attachments URL.
+        /// </summary>
+        /// <value>The attachments URL.</value>
+        public string AttachmentsUrl { get; private set; }
     }
 }