diff --git a/keygrip/index.d.ts b/keygrip/index.d.ts
new file mode 100644
index 0000000000..b5929aaec6
--- /dev/null
+++ b/keygrip/index.d.ts
@@ -0,0 +1,19 @@
+// Type definitions for keygrip 1.0
+// Project: https://github.com/crypto-utils/keygrip
+// Definitions by: jKey Lu <https://github.com/jkeylu>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare interface Keygrip {
+    sign(data: any): string;
+    verify(data: any, digest: string): boolean;
+    index(data: any, digest: string): number;
+}
+
+declare interface KeygripFunction {
+    new (keys: string[], algorithm?: string, encoding?: string): Keygrip;
+    (keys: string[], algorithm?: string, encoding?: string): Keygrip;
+}
+
+declare const Keygrip: KeygripFunction;
+
+export = Keygrip;
diff --git a/keygrip/keygrip-tests.ts b/keygrip/keygrip-tests.ts
new file mode 100644
index 0000000000..afa66e04b1
--- /dev/null
+++ b/keygrip/keygrip-tests.ts
@@ -0,0 +1,4 @@
+import * as Keygrip from 'keygrip';
+
+let keys = Keygrip(['123']);
+let hash = keys.sign('abc');
diff --git a/keygrip/tsconfig.json b/keygrip/tsconfig.json
new file mode 100644
index 0000000000..07650e90f3
--- /dev/null
+++ b/keygrip/tsconfig.json
@@ -0,0 +1,20 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "target": "es6",
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "keygrip-tests.ts"
+    ]
+}
diff --git a/keygrip/tslint.json b/keygrip/tslint.json
new file mode 100644
index 0000000000..377cc837d4
--- /dev/null
+++ b/keygrip/tslint.json
@@ -0,0 +1 @@
+{ "extends": "../tslint.json" }