diff --git a/fast-json-patch/fast-json-patch-tests.ts b/fast-json-patch/fast-json-patch-tests.ts
new file mode 100644
index 0000000000..e7ecc249ac
--- /dev/null
+++ b/fast-json-patch/fast-json-patch-tests.ts
@@ -0,0 +1,43 @@
+/// <reference path="./fast-json-patch.d.ts" />
+import * as jsonpatch from 'fast-json-patch'
+
+var myobj:{
+    firstName:string,
+    contactDetails: {
+        phoneNumbers:string[]
+    }
+} = { firstName:"Albert", contactDetails: { phoneNumbers: [ ] } };
+var patches = [
+   {op:"replace", path:"/firstName", value:"Joachim" },
+   {op:"add", path:"/lastName", value:"Wester" },
+   {op:"add", path:"/contactDetails/phoneNumbers/0", value:{ number:"555-123" }  }
+   ];
+jsonpatch.apply( myobj, patches );
+
+var myobj2 = { firstName:"Joachim", lastName:"Wester", contactDetails: { phoneNumbers: [ { number:"555-123" }] } };
+var observer = jsonpatch.observe( myobj2 );
+myobj2.firstName = "Albert";
+myobj2.contactDetails.phoneNumbers[0].number = "123";
+myobj2.contactDetails.phoneNumbers.push({number:"456"});
+var patches2 = jsonpatch.generate(observer);
+
+var objA = {user: {firstName: "Albert", lastName: "Einstein"}};
+var objB = {user: {firstName: "Albert", lastName: "Collins"}};
+var diff = jsonpatch.compare(objA, objB);
+
+var obj = {user: {firstName: "Albert"}};
+var patches3 = [{op: "replace", path: "/user/firstName", value: "Albert"}, {op: "replace", path: "/user/lastName", value: "Einstein"}];
+var errors = jsonpatch.validate(patches, obj);
+if (errors.length == 0) {
+ //there are no errors!
+}
+else {
+  for (var i=0; i < errors.length; i++) {
+    if (!errors[i]) {
+      console.log("Valid patch at index", i, patches[i]);
+    }
+    else {
+      console.error("Invalid patch at index", i, errors[i], patches[i]);
+    }
+  }
+}
diff --git a/fast-json-patch/fast-json-patch.d.ts b/fast-json-patch/fast-json-patch.d.ts
new file mode 100644
index 0000000000..a855b35d36
--- /dev/null
+++ b/fast-json-patch/fast-json-patch.d.ts
@@ -0,0 +1,67 @@
+// Type definitions for JSON-Patch v1.0.0
+// Project: https://github.com/Starcounter-Jack/JSON-Patch/releases
+// Definitions by: Francis O'Brien <https://github.com/itsFrank>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare namespace fastjsonpatch {
+    
+
+    interface JsonPatch {
+        /**
+         * Applies an array of patch instructions to an object
+         */
+        apply(object:any, patches:Patch[], validate?:boolean):boolean
+        
+        /**
+         * Observes changes made to an object, which can then be retieved using generate
+         */
+        observe<T>(object:T, callback?:()=>void):Observer<T>
+        
+        /**
+         * Detach an observer from an object
+         */
+        unobserve<T>(object:T, observer:Observer<T>):void
+
+        /**
+         * Generate an array of patches from an observer
+         */
+        generate<T>(observer:Observer<T>):Patch[]
+
+        /**
+         * Create an array of patches from the differences in two objects
+         */
+        compare(object1:any, object2:any):Patch[]
+
+        /**
+         * Ensure a set of patch instructions is valid
+         */
+        validate(patches:Patch[], tree?:any):JsonPatchError[]
+    }
+    
+    interface Observer<T> {
+        object:T
+        patches:Patch[]
+        unobserve():void
+    }
+
+    interface Patch {
+        op:string
+        path:string
+        value?:any
+        from?:string
+    }
+
+    interface JsonPatchError {
+        name:string
+        message:string
+        index:number
+        operation:any
+        tree:any
+    }
+}
+
+declare  var jsonpatch: fastjsonpatch.JsonPatch;
+
+declare module "fast-json-patch" {
+    export = jsonpatch
+}
\ No newline at end of file