diff --git a/sendgrid/sendgrid.d.ts b/sendgrid/sendgrid.d.ts
new file mode 100644
index 000000000..96d52601e
--- /dev/null
+++ b/sendgrid/sendgrid.d.ts
@@ -0,0 +1,122 @@
+// Type definitions for sendgrid 1.1.0
+// Project: https://github.com/sendgrid/sendgrid-nodejs
+// Definitions by: Maxime LUCE <https://github.com/SomaticIT>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+interface SendgridUriParts {
+    protocol: string;
+    host: string;
+    port: string;
+    endpoint: string;
+}
+
+interface SendgridOptions {
+    protocol?: string;
+    host?: string;
+    port?: string;
+    endpoint?: string;
+    uri?: string;
+}
+
+interface SendgridOptionsExport {
+    uriParts: SendgridUriParts;
+    uri: string;
+}
+
+interface SendgridEmailOptions {
+    to?: any;
+    toname?: string;
+    from?: string;
+    fromname?: string;
+    subject?: string;
+    text?: string;
+    html?: string;
+    bcc?: any;
+    replyto?: string;
+    date?: Date;
+    headers?: { [key: string]: string };
+    files?: SendgridEmailFileOptions[];
+    smtpapi?: any;
+}
+
+declare class PrivateSendgridEmail {
+    to: any;
+    toname: string;
+    from: string;
+    fromname: string;
+    subject: string;
+    text: string;
+    html: string;
+    bcc: any;
+    replyto: string;
+    date: Date;
+    headers: { [key: string]: string };
+    files: PrivateSendgridFile[];
+    smtpapi: any;
+
+    constructor();
+    constructor(options: SendgridEmailOptions);
+
+    addTo(address: string): void;
+    addHeader(type: string, value: string): void;
+    addSubstitution(type: string, value: string): void;
+    addSubstitution(type: string, value: string[]): void;
+    addSection(section: { [key: string]: string }): void;
+    addUniqueArg(uarg: { [key: string]: string }): void;
+    addCategory(category: string): void;
+    addFilter(filter: string, command: string, value: number): void;
+    addFilter(filter: string, command: string, value: string): void;
+    addFile(file: SendgridEmailFileOptions): void;
+
+    setFrom(address: string): void;
+    setSubject(subject: string): void;
+    setText(text: string): void;
+    setHtml(html: string): void;
+    setHeaders(headers: { [key: string]: string }): void;
+    setSubstitutions(substitutions: { [key: string]: string[] }): void;
+    setSections(sections: { [key: string]: string }): void;
+    setUniqueArgs(uargs: { [key: string]: string }): void;
+    setCategories(categories: string[]): void;
+    setFilters(filters: any): void;
+}
+
+interface SendgridEmailFileOptions {
+    filename?: string;
+    contentType?: string;
+    cid?: string;
+    path?: string;
+    url?: string;
+    content?: any;
+}
+
+declare class PrivateSendgridFile {
+    filename: string;
+    contentType: string;
+    cid: string;
+
+    type: string;
+    content: string;
+    path: string;
+    url: string;
+
+    loadContent(callback: (hasError: boolean, error: Error) => any): void;
+}
+
+interface Sendgrid {
+    version: string;
+    api_user: string;
+    api_key: string;
+    options: SendgridOptionsExport;
+    Email: typeof PrivateSendgridEmail;
+
+    send(email: PrivateSendgridEmail, callback: (err: Error, json: any) => any): void;
+}
+
+declare module "sendgrid" {
+    interface SendgridConstructor {
+        (api_user: string, api_key: string, options?: SendgridOptions): Sendgrid;
+        new (api_user: string, api_key: string, options?: SendgridOptions): Sendgrid;
+    }
+
+    export = SendgridConstructor;
+}
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