diff --git a/README.md b/README.md
index de7e9d0..94e618d 100644
--- a/README.md
+++ b/README.md
@@ -133,9 +133,9 @@ Below is a table containing all of the possible configuration options for the `d
 | resourceArn | `string` | The ARN of your Aurora Serverless Cluster. This value is *required*, but can be overridden when querying. |  |
 | secretArn | `string` | The ARN of the secret associated with your database credentials. This is *required*, but can be overridden when querying. |  |
 | database | `string` | *Optional* default database to use with queries. Can be overridden when querying. |  |
-| hydrateColumnNames | `boolean` | When `true`, results will be returned as objects with column names as keys. If `false`, results will be returned as an array of values. | `true` |
-| keepAlive | `boolean` | Enables HTTP Keep-Alive for calls to the AWS SDK. This dramatically decreases the latency of subsequent calls. | `true` |
-| sslEnabled | `boolean` | *Optional* Enables SSL HTTP endpoint. Can be disable for local development. | `true` |
+| hydrateColumnNames | `boolean` | *Optional* When `true`, results will be returned as objects with column names as keys. If `false`, results will be returned as an array of values. | `true` |
+| keepAlive | `boolean` | *Optional* Enables HTTP Keep-Alive for calls to the AWS SDK. This dramatically decreases the latency of subsequent calls. | `true` |
+| sslEnabled | `boolean` | *Optional* Enables SSL HTTP endpoint. Can be disabled for local development. | `true` |
 | options | `object` | An *optional* configuration object that is passed directly into the RDSDataService constructor. See [here](https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/RDSDataService.html#constructor-property) for available options.  | `{}` |
 | region | `string`  | *Optional* AWS region to use. | `aws-sdk default` |
 
diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..c3c4719
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,44 @@
+declare module 'data-api-client' {
+    import type { ClientConfiguration } from 'aws-sdk/clients/rdsdataservice';
+
+    export interface iParams {
+        secretArn: string;
+        resourceArn: string;
+        database?: string;
+        keepAlive?: boolean;
+        hydrateColumnNames?: boolean;
+        sslEnabled?: boolean;
+        options?: ClientConfiguration;
+        region?: string;
+    }
+
+    interface iTransaction {
+        query: iQuery<iTransaction>;
+        rollback: (error: Error, status: any) => void;
+        commit: () => Promise<void>;
+    }
+
+    interface iQuery<T> {
+        (sql: string, params?: [] | unknown): Promise<T>; // params can be [] or {}
+        (obj: { sql: string; parameters: [] | unknown; database?: string; hydrateColumnNames?: boolean }): Promise<T>;
+    }
+
+    export interface iDataAPIClient {
+        query: iQuery<iDataAPIQueryResult>;
+        transaction(): iTransaction; // needs to return an interface with
+
+        // promisified versions of the RDSDataService methods
+        // TODO add actual return types
+        batchExecuteStatement: (...args) => Promise<any>;
+        beginTransaction: (...args) => Promise<any>;
+        commitTransaction: (...args) => Promise<any>;
+        executeStatement: (...args) => Promise<any>;
+        rollbackTransaction: (...args) => Promise<any>;
+    }
+
+    export interface iDataAPIQueryResult {
+        records: Array<any>;
+    }
+
+    export default function (params: iParams): iDataAPIClient;
+}
diff --git a/package.json b/package.json
index 4e086fa..8feeb6e 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "1.0.1",
   "description": "A lightweight wrapper that simplifies working with the Amazon Aurora Serverless Data API",
   "main": "index.js",
+  "types": "index.d.ts",
   "scripts": {
     "test": "jest",
     "test-ci": "eslint . && jest",