diff --git a/src/main/java/ca/mgamble/postman/api/response/ErrorCode.java b/src/main/java/ca/mgamble/postman/api/response/ErrorCode.java
new file mode 100644
index 0000000..8e475b3
--- /dev/null
+++ b/src/main/java/ca/mgamble/postman/api/response/ErrorCode.java
@@ -0,0 +1,91 @@
+
+package ca.mgamble.postman.api.response;
+
+import com.google.gson.annotations.SerializedName;
+import java.io.Serializable;
+/**
+ *
+ * @author mgamble
+ */
+/*
+The MIT License (MIT)
+
+Copyright (c) 2017 Matthew M. Gamble https://www.mgamble.ca
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+ */
+
+public enum ErrorCode  implements Serializable {
+    @SerializedName("InvalidServerAPIKey")
+    InvalidServerAPIKey("InvalidServerAPIKey"),
+
+    @SerializedName("NoRecipients")
+    NoRecipients("NoRecipients"),
+
+    @SerializedName("NoContent")
+    NoContent("NoContent"),
+
+    @SerializedName("NotEnoughCredits")
+    NotEnoughCredits("NotEnoughCredits"),
+
+    @SerializedName("TooManyToAddresses")
+    TooManyToAddresses("TooManyToAddresses"),
+
+    @SerializedName("TooManyCCAddresses")
+    TooManyCCAddresses("TooManyCCAddresses"),
+
+    @SerializedName("TooManyBCCAddresses")
+    TooManyBCCAddresses("TooManyBCCAddresses"),
+
+    @SerializedName("FromAddressMissing")
+    FromAddressMissing("FromAddressMissing"),
+
+    @SerializedName("UnauthenticatedFromAddress")
+    UnauthenticatedFromAddress("UnauthenticatedFromAddress"),
+
+    @SerializedName("AttachmentMissingName")
+    AttachmentMissingName("AttachmentMissingName"),
+
+    @SerializedName("AttachmentMissingData")
+    AttachmentMissingData("AttachmentMissingData"),
+
+    @SerializedName("ValidationError")
+    ValidationError("ValidationError");
+
+    private final String text;
+
+    ErrorCode(String text) {
+        this.text = text;
+    }
+
+    public String getText() {
+        return this.text;
+    }
+
+    public static ErrorCode fromString(String text) {
+        if (text != null) {
+            for (ErrorCode b : ErrorCode.values()) {
+                if (text.equalsIgnoreCase(b.text)) {
+                    return b;
+                }
+            }
+        }
+        return null;
+    }
+}
diff --git a/src/main/java/ca/mgamble/postman/api/response/OperationStatus.java b/src/main/java/ca/mgamble/postman/api/response/OperationStatus.java
new file mode 100644
index 0000000..5d8d101
--- /dev/null
+++ b/src/main/java/ca/mgamble/postman/api/response/OperationStatus.java
@@ -0,0 +1,60 @@
+
+package ca.mgamble.postman.api.response;
+
+import com.google.gson.annotations.SerializedName;
+import java.io.Serializable;
+/**
+ *
+ * @author mgamble
+ */
+/*
+The MIT License (MIT)
+
+Copyright (c) 2017 Matthew M. Gamble https://www.mgamble.ca
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+ */
+
+public enum OperationStatus  implements Serializable {
+    @SerializedName("success")
+    SUCCESS("success"),
+    @SerializedName("error")
+    ERROR("error");
+
+    private final String text;
+
+    OperationStatus(String text) {
+        this.text = text;
+    }
+
+    public String getText() {
+        return this.text;
+    }
+
+    public static OperationStatus fromString(String text) {
+        if (text != null) {
+            for (OperationStatus b : OperationStatus.values()) {
+                if (text.equalsIgnoreCase(b.text)) {
+                    return b;
+                }
+            }
+        }
+        return null;
+    }
+}
diff --git a/src/main/java/ca/mgamble/postman/api/response/PostmanApiResponse.java b/src/main/java/ca/mgamble/postman/api/response/PostmanApiResponse.java
new file mode 100644
index 0000000..bfb3421
--- /dev/null
+++ b/src/main/java/ca/mgamble/postman/api/response/PostmanApiResponse.java
@@ -0,0 +1,44 @@
+/**
+ *
+ * @author mgamble
+ */
+/*
+The MIT License (MIT)
+
+Copyright (c) 2017 Matthew M. Gamble https://www.mgamble.ca
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+ */
+
+package ca.mgamble.postman.api.response;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+public class PostmanApiResponse {
+    private OperationStatus status;
+    private String time;
+    private ResponseData data;
+
+    public PostmanApiResponse(OperationStatus status) {
+        this.status = status;
+    }
+}
diff --git a/src/main/java/ca/mgamble/postman/api/response/ResponseData.java b/src/main/java/ca/mgamble/postman/api/response/ResponseData.java
new file mode 100644
index 0000000..c6e8ae8
--- /dev/null
+++ b/src/main/java/ca/mgamble/postman/api/response/ResponseData.java
@@ -0,0 +1,45 @@
+/*
+ * The MIT License
+ *
+ * Copyright 2017 mgamble.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package ca.mgamble.postman.api.response;
+
+import lombok.Data;
+
+import java.util.Map;
+
+/**
+ *
+ * @author mgamble
+ */
+@Data
+public class ResponseData {
+    private ErrorCode code;
+    private String message;
+    private String token;
+    private String message_id;
+    private Map<String, SendResult> messages;
+
+    public String getResponseSumary() {
+        return code != null ? code.getText() + " " : "" + message + " for message_id = " + message_id;
+    }
+}
diff --git a/src/main/java/ca/mgamble/postman/api/response/SendResult.java b/src/main/java/ca/mgamble/postman/api/response/SendResult.java
new file mode 100644
index 0000000..353f739
--- /dev/null
+++ b/src/main/java/ca/mgamble/postman/api/response/SendResult.java
@@ -0,0 +1,36 @@
+/*
+ * The MIT License
+ *
+ * Copyright 2017 mgamble.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package ca.mgamble.postman.api.response;
+
+import lombok.Data;
+
+/**
+ *
+ * @author mgamble
+ */
+@Data
+public class SendResult {
+    private String id;
+    private String token;
+}