diff --git a/types/node-zendesk/index.d.ts b/types/node-zendesk/index.d.ts
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+// Type definitions for node-zendesk 1.4
+// Project: https://github.com/blakmatrix/node-zendesk
+// Definitions by: jgeth <https://github.com/jgeth>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 3.0
+
+/// <reference types="node"/>
+
+import { PathLike } from 'fs';
+
+export type ZendeskCallback<TResponse, TResult> = (
+    error: Error | undefined,
+    response: TResponse,
+    result: TResult
+) => void;
+
+export interface Client {
+    accountsettings: unknown;
+    activitystream: unknown;
+    attachments: Attachments.Methods;
+    brand: unknown;
+    categories: unknown;
+    customagentroles: unknown;
+    dynamiccontent: unknown;
+    forums: unknown;
+    forumsubscriptions: unknown;
+    groupmemberships: unknown;
+    groups: unknown;
+    helpers: unknown;
+    imports: unknown;
+    installations: unknown;
+    jobstatuses: JobStatuses.Methods;
+    locales: unknown;
+    macros: Macros.Methods;
+    oauthtokens: unknown;
+    organizationfields: unknown;
+    organizationmemberships: unknown;
+    organizations: unknown;
+    policies: unknown;
+    requests: Requests.Methods;
+    satisfactionratings: unknown;
+    search: unknown;
+    sessions: unknown;
+    sharingagreement: unknown;
+    suspendedtickets: unknown;
+    tags: unknown;
+    targets: unknown;
+    ticketaudits: unknown;
+    ticketevents: unknown;
+    ticketexport: unknown;
+    ticketfields: unknown;
+    ticketforms: unknown;
+    ticketimport: unknown;
+    ticketmetrics: unknown;
+    tickets: Tickets.Methods;
+    topiccomments: unknown;
+    topics: unknown;
+    topicsubscriptions: unknown;
+    topicvotes: unknown;
+    triggers: unknown;
+    userfields: Users.Fields.Methods;
+    useridentities: Users.Identities.Methods;
+    users: Users.Methods;
+    views: unknown;
+}
+
+export interface ClientOptions {
+    username: string;
+    token: string;
+    remoteUri: string;
+    oauth?: boolean;
+    debug?: boolean;
+    disableGlobalState?: boolean;
+    asUser?: string;
+}
+
+export function createClient(config: ClientOptions): Client;
+
+export namespace Attachments {
+    interface Methods {
+        request(httpMethod: string, fields: unknown, config: unknown, cb: ZendeskCallback<unknown, unknown>): unknown;
+
+        upload(
+            file: PathLike,
+            fileOptions: {
+                filename: string;
+                token?: string;
+            },
+            cb: ZendeskCallback<unknown, unknown>
+        ): void;
+    }
+
+    interface Photo extends PersistableModel {
+        url: string;
+        file_name: string;
+        content_url: string;
+        content_type: string;
+        size: number;
+        width: number;
+        height: number;
+        inline: boolean;
+    }
+
+    interface Model extends Photo {
+        thumbnails: ReadonlyArray<Photo>;
+    }
+}
+
+/**
+ * @see {@link https://developer.zendesk.com/rest_api/docs/support/job_statuses|Zendesk Job Statuses}
+ */
+export namespace JobStatuses {
+    interface Methods {
+        show(jobStatusId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+        watch(
+            jobStatusId: ZendeskID,
+            interval: number,
+            maxAttempts: number,
+            cb: ZendeskCallback<unknown, unknown>
+        ): unknown;
+    }
+
+    type Status = 'queued' | 'working' | 'failed' | 'completed' | 'killed';
+
+    interface Result extends PersistableModel {
+        readonly action: string;
+        readonly success: boolean;
+        readonly status: string;
+    }
+
+    interface ResponseModel extends PersistableModel {
+        readonly url?: string | null;
+        readonly total?: number;
+        readonly progress?: number;
+        readonly status?: Status;
+        readonly message?: string | null;
+        readonly results?: ReadonlyArray<Result>;
+    }
+
+    interface ResponsePayload {
+        readonly job_status: ResponseModel;
+    }
+}
+
+/**
+ * @see {@link https://developer.zendesk.com/rest_api/docs/support/macros|Zendesk Macros}
+ */
+export namespace Macros {
+    interface Methods {
+        applyTicket(
+            ticketId: ZendeskID,
+            macroId: number,
+            cb: ZendeskCallback<unknown, unknown>
+        ): ApplyTicketResponsePayload;
+    }
+
+    interface ApplyTicketResponsePayload {
+        result: {
+            ticket: Tickets.CreateModel;
+            comment: {
+                body: string;
+                html_body: string;
+                scoped_body?: unknown;
+                public?: boolean;
+            };
+        };
+    }
+}
+
+/**
+ * @see {@link https://developer.zendesk.com/rest_api/docs/support/organizations|Zendesk Organizations}
+ */
+export namespace Organizations {
+    interface Model extends AuditableModel {
+        readonly url?: string;
+        external_id?: string | null;
+        name: string;
+        domain_names?: ReadonlyArray<string>;
+        details?: string | null;
+        notes?: string | null;
+        group_id?: number | null;
+        shared_tickets?: boolean;
+        shared_comments?: boolean;
+        tags?: ReadonlyArray<string>;
+        organization_fields?: object | null;
+    }
+}
+
+/**
+ * @see {@link https://developer.zendesk.com/rest_api/docs/support/requests|Zendesk Requests}
+ */
+export namespace Requests {
+    interface Methods {
+        /** Listing Requests */
+        list(cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listOpen(cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listSolved(cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listCCD(organizationId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listByUser(userId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listByOrganization(organizationId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+
+        /** Viewing Requests */
+        getRequest(requestId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+
+        /** Creating Requests */
+        create(request: CreatePayload, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+
+        /** Updating Requests */
+        update(requestId: ZendeskID, request: UpdatePayload, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+
+        /** Listing Comments */
+        listComments(requestId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): Comments.ListPayload;
+
+        /** Get Comment */
+        getComment(
+            requestId: ZendeskID,
+            commentId: ZendeskID,
+            cb: ZendeskCallback<unknown, unknown>
+        ): Comments.ResponsePayload;
+
+        /** Inherited */
+        requestAll(httpMethod: string, fields: unknown, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+    }
+
+    /**
+     * @see {@link https://developer.zendesk.com/rest_api/docs/support/requests#create-request|Zendesk Requests Create}
+     */
+    interface CreateModel {
+        requester?: RequesterAnonymous; // Required for anonymous requests
+        subject: string;
+        comment: Comments.CreateModel;
+        priority?: Tickets.Priority | null; // Anonymous requests can set priority, Authenticated requests cannot
+        type?: Tickets.TicketType | null; // Anonymous requests can set type, Authenticated requests cannot
+        custom_fields?: Tickets.Field[] | null;
+        fields?: Tickets.Field[] | null;
+        due_at?: string | null; // Anonymous requests can set due date as long as type == task. Authenticated requests cannot
+        ticket_form_id?: number | null;
+        recipient?: string | null;
+        collaborators?: ZendeskID[] | string[] | Collaborator[];
+    }
+
+    /**
+     * @see {@link https://developer.zendesk.com/rest_api/docs/support/requests#update-request|Zendesk Requests Update}
+     */
+    interface UpdateModel {
+        comment?: Comments.CreateModel;
+        solved?: boolean;
+        additional_collaborators?: ZendeskID[] | string[] | Collaborator[];
+    }
+
+    /**
+     * @see {@link https://developer.zendesk.com/rest_api/docs/support/requests#json-format|Zendesk Requests JSON Format}
+     */
+    interface ResponseModel extends AuditableModel {
+        readonly url: string;
+        readonly subject: string;
+        readonly description: string;
+        readonly status: Tickets.Status;
+        readonly priority: Tickets.Priority | null;
+        readonly type: Tickets.TicketType | null;
+        readonly custom_fields: Tickets.Field[] | null;
+        readonly fields: Tickets.Field[] | null;
+        readonly organization_id: ZendeskID | null;
+        readonly requester_id: ZendeskID;
+        readonly assignee_id: ZendeskID | null;
+        readonly group_id?: ZendeskID | null;
+        readonly collaborator_ids: ZendeskID[];
+        readonly email_cc_ids: ZendeskID[];
+        readonly via: Tickets.Via;
+        readonly is_public: boolean;
+        readonly due_at: string | null;
+        readonly can_be_solved_by_me?: boolean;
+        readonly solved?: boolean;
+        readonly ticket_form_id?: number | null;
+        readonly recipient: string | null;
+        readonly followup_source_id: string | null;
+    }
+
+    interface RequesterAnonymous {
+        name: string;
+        email?: string;
+        locale_id?: ZendeskID;
+    }
+
+    interface Collaborator {
+        name?: string;
+        email: string;
+    }
+
+    interface CreatePayload {
+        readonly request: CreateModel;
+    }
+
+    interface UpdatePayload {
+        readonly request: UpdateModel;
+    }
+
+    interface ResponsePayload {
+        readonly request: ResponseModel;
+    }
+
+    interface ListPayload extends PaginablePayload {
+        readonly requests: ReadonlyArray<ResponseModel>;
+    }
+
+    namespace Comments {
+        interface CreateModel {
+            url?: string;
+            request_id?: number;
+            body?: string;
+            html_body?: string;
+            public?: boolean;
+            author_id?: ZendeskID;
+            uploads?: ReadonlyArray<string>;
+        }
+
+        interface ResponseModel extends TemporalModel {
+            readonly url: string;
+            readonly type: RequestType;
+            readonly request_id: number;
+            readonly body: string;
+            readonly html_body: string;
+            readonly plain_body: string;
+            readonly public: boolean;
+            readonly author_id: ZendeskID;
+            readonly attachments: ReadonlyArray<Attachments.Model>;
+            readonly via?: Tickets.Via;
+            readonly metadata?: Tickets.Comments.Metadata;
+        }
+
+        type RequestType = 'Comment' | 'VoiceComment';
+
+        namespace CommentsUsers {
+            interface ResponseModel extends PersistableModel {
+                readonly name: string;
+                readonly photo: Attachments.Model | null;
+                readonly agent: boolean;
+                readonly organization_id: number | null;
+            }
+        }
+
+        interface ListPayload extends PaginablePayload {
+            comments: ReadonlyArray<ResponseModel>;
+            users: ReadonlyArray<CommentsUsers.ResponseModel>;
+            organizations: ReadonlyArray<Tickets.Comments.Organizations.ResponseModel>;
+        }
+
+        interface ResponsePayload {
+            readonly comment: ResponseModel;
+        }
+    }
+}
+
+/**
+ * @see {@link https://developer.zendesk.com/rest_api/docs/support/tickets|Zendesk Tickets}
+ */
+export namespace Tickets {
+    interface Methods {
+        /** Listing Tickets */
+        list(cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listAssigned(userId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listByOrganization(organizationId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listByUserRequested(userId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listByUserCCD(userId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listWithFilter(type: string, value: unknown, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listRecent(cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listCollaborators(ticketId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): Users.ListPayload;
+        listIncidents(ticketId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listMetrics(ticketId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): Metrics.ResponsePayload;
+
+        /** Viewing Tickets */
+        show(ticketId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+        showMany(ticketIds: ReadonlyArray<ZendeskID>, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+
+        /** Creating Tickets */
+        create(ticket: CreatePayload, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+        createMany(tickets: CreateManyPayload, cb: ZendeskCallback<unknown, unknown>): JobStatuses.ResponsePayload;
+
+        /** Updating Tickets */
+        update(ticketId: ZendeskID, ticket: UpdatePayload, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+        updateMany(tickets: UpdateManyPayload, cb: ZendeskCallback<unknown, unknown>): JobStatuses.ResponsePayload;
+
+        /** Deleting Tickets */
+        delete(ticketId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): unknown;
+        deleteMany(ticketIds: ReadonlyArray<ZendeskID>, cb: ZendeskCallback<unknown, unknown>): unknown;
+
+        /** Merging Tickets */
+        merge(
+            ticketId: ZendeskID,
+            mergingTickets: MergePayload,
+            cb: ZendeskCallback<unknown, unknown>
+        ): JobStatuses.ResponsePayload;
+
+        /** Ticket Exports */
+        export(startTime: number, cb: ZendeskCallback<unknown, unknown>): unknown;
+        exportSample(startTime: number, options: unknown): unknown;
+        incremental(startTime: number, cb: ZendeskCallback<unknown, unknown>): unknown;
+        incrementalInclude(startTime: number, include: unknown, cb: ZendeskCallback<unknown, unknown>): unknown;
+        incrementalSample(startTime: number, cb: ZendeskCallback<unknown, unknown>): unknown;
+
+        /** Listing Comments */
+        getComments(requestId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): Comments.ListPayload;
+
+        /** Listing Audits */
+        exportAudit(ticketId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): AuditsListPayload;
+
+        /** Adding Tags */
+        addTags(ticketId: ZendeskID, tags: ReadonlyArray<string>, cb: ZendeskCallback<unknown, unknown>): TagsPayload;
+    }
+
+    /**
+     * @see {@link https://developer.zendesk.com/rest_api/docs/support/tickets#create-ticket|Zendesk Tickets Create}
+     */
+    interface CreateModel {
+        comment: Requests.Comments.CreateModel;
+        external_id?: string | null;
+        type?: TicketType | null;
+        subject?: string | null;
+        raw_subject?: string | null;
+        priority?: Priority | null;
+        status?: Status | null;
+        recipient?: string | null;
+        requester_id?: ZendeskID;
+        submitter_id?: ZendeskID | null;
+        assignee_id?: ZendeskID | null;
+        organization_id?: number | null;
+        group_id?: number | null;
+        collaborator_ids?: ReadonlyArray<number> | null;
+        collaborators?: ReadonlyArray<any> | null;
+        follower_ids?: ReadonlyArray<number> | null;
+        email_cc_ids?: ReadonlyArray<number> | null;
+        forum_topic_id?: number | null;
+        problem_id?: number | null;
+        due_at?: string | null;
+        tags?: ReadonlyArray<string> | null;
+        custom_fields?: Field[] | null;
+        fields?: Field[] | null;
+        via_followup_source_id?: number | null;
+        macro_ids?: ReadonlyArray<number> | null;
+        ticket_form_id?: number | null;
+        brand_id?: number | null;
+    }
+
+    /**
+     * @see {@link https://developer.zendesk.com/rest_api/docs/support/tickets#update-ticket|Zendesk Tickets Update}
+     */
+    interface UpdateModel {
+        subject?: string | null;
+        comment?: Requests.Comments.CreateModel;
+        requester_id?: ZendeskID;
+        assignee_id?: ZendeskID | null;
+        assignee_email?: string | null;
+        group_id?: number | null;
+        organization_id?: number | null;
+        collaborator_ids?: ReadonlyArray<number> | null;
+        additional_collaborators?: ReadonlyArray<any> | null;
+        followers?: ReadonlyArray<Follower> | null;
+        email_ccs?: ReadonlyArray<EmailCC> | null;
+        type?: TicketType | null;
+        priority?: Priority | null;
+        status?: Status | null;
+        tags?: ReadonlyArray<string> | null;
+        external_id?: string | null;
+        problem_id?: number | null;
+        due_at?: string | null;
+        custom_fields?: Field[] | null;
+        updated_stamp?: string | null;
+        safe_update?: boolean;
+        sharing_agreement_ids?: ReadonlyArray<number> | null;
+        macro_ids?: ReadonlyArray<number> | null;
+        attribute_value_ids?: ReadonlyArray<number> | null;
+    }
+
+    /**
+     * @see {@link https://developer.zendesk.com/rest_api/docs/support/tickets#json-format|Zendesk Tickets JSON Format}
+     */
+    interface ResponseModel extends AuditableModel {
+        readonly url: string;
+        readonly external_id: string | null;
+        readonly type: TicketType | null;
+        readonly subject: string | null;
+        readonly raw_subject: string | null;
+        readonly description: string;
+        readonly priority: Priority | null;
+        readonly status: Status;
+        readonly recipient: string | null;
+        readonly requester_id: ZendeskID;
+        readonly submitter_id: ZendeskID;
+        readonly assignee_id: ZendeskID | null;
+        readonly organization_id: number;
+        readonly group_id: number | null;
+        readonly collaborator_ids: ReadonlyArray<number>;
+        readonly follower_ids: ReadonlyArray<number>;
+        readonly email_cc_ids: ReadonlyArray<number>;
+        readonly forum_topic_id: number | null;
+        readonly problem_id: number | null;
+        readonly has_incidents: boolean;
+        readonly due_at: string | null;
+        readonly tags: ReadonlyArray<string>;
+        readonly via: Via;
+        readonly custom_fields: Field[];
+        readonly fields: Field[];
+        readonly satisfaction_rating: object | string | null;
+        readonly sharing_agreement_ids: ReadonlyArray<number>;
+        readonly followup_ids: ReadonlyArray<number>;
+        readonly ticket_form_id?: number | null; // Enterprise version only
+        readonly brand_id?: number | null; // Enterprise version only
+        readonly allow_channelback: boolean;
+        readonly allow_attachments: boolean;
+        readonly is_public: boolean;
+        readonly comment_count?: number;
+    }
+
+    interface Audit {
+        readonly id: ZendeskID;
+        readonly ticket_id: ZendeskID;
+        readonly metadata: unknown | null;
+        readonly via: Via | null;
+        readonly created_at: string;
+        readonly author_id: ZendeskID;
+        readonly events: ReadonlyArray<unknown> | null;
+    }
+
+    interface EmailCC {
+        user_id?: ZendeskID;
+        user_email?: string;
+        action: string;
+    }
+
+    interface Field {
+        id: number;
+        value: any;
+    }
+
+    interface Follower {
+        user_id?: ZendeskID;
+        user_email?: string;
+        action: string;
+    }
+
+    type Priority = 'urgent' | 'high' | 'normal' | 'low';
+
+    type Status = 'new' | 'open' | 'pending' | 'hold' | 'solved' | 'closed';
+
+    type TicketType = 'problem' | 'incident' | 'question' | 'task';
+
+    interface Via {
+        channel: ViaChannel;
+        source: ViaSource;
+    }
+
+    type ViaChannel = 'api' | 'web' | 'mobile' | 'rule' | 'system';
+
+    interface ViaSource {
+        to: object;
+        from: object;
+        rel: string | null;
+    }
+
+    interface CreatePayload {
+        readonly ticket: CreateModel;
+    }
+
+    interface CreateManyPayload {
+        readonly tickets: ReadonlyArray<CreateModel>;
+    }
+
+    interface UpdatePayload {
+        readonly ticket: UpdateModel;
+    }
+
+    interface UpdateManyPayload {
+        readonly tickets: ReadonlyArray<UpdateModel>;
+    }
+
+    interface MergePayload {
+        readonly ids: ReadonlyArray<ZendeskID>;
+        readonly target_comment?: string | null;
+        readonly source_comment?: string | null;
+    }
+
+    interface AuditsListPayload extends PaginablePayload {
+        readonly audits: ReadonlyArray<Audit>;
+    }
+
+    interface TagsPayload {
+        readonly tags: ReadonlyArray<string>;
+    }
+
+    interface ResponsePayload {
+        readonly ticket: ResponseModel;
+        readonly audit: Audit;
+    }
+
+    interface ListPayload extends PaginablePayload {
+        readonly tickets: ReadonlyArray<ResponseModel>;
+    }
+
+    namespace Comments {
+        interface ResponseModel extends Requests.Comments.ResponseModel {
+            readonly via?: Via;
+            readonly metadata?: Metadata;
+        }
+
+        interface Metadata {
+            flags?: ReadonlyArray<number>;
+            flag_options: unknown;
+        }
+
+        interface ListPayload extends PaginablePayload {
+            comments: ReadonlyArray<ResponseModel>;
+        }
+
+        namespace CommentsUsers {
+            interface ResponseModel extends Requests.Comments.CommentsUsers.ResponseModel {
+                readonly role: Users.Role;
+            }
+        }
+
+        namespace Organizations {
+            interface ResponseModel extends PersistableModel {
+                readonly name: string;
+            }
+        }
+    }
+
+    namespace Metrics {
+        interface MinutesObject {
+            calendar: number;
+            business: number;
+        }
+
+        interface ResponseModel extends AuditableModel {
+            readonly ticket_id?: ZendeskID;
+            readonly url?: string;
+            readonly group_stations?: number;
+            readonly assignee_stations?: number;
+            readonly reopens?: number;
+            readonly replies?: number;
+            readonly assignee_updated_at?: string | null;
+            readonly requester_updated_at?: string | null;
+            readonly initially_assigned_at?: string | null;
+            readonly assigned_at?: string | null;
+            readonly solved_at?: string | null;
+            readonly latest_comment_added_at?: string | null;
+            readonly first_resolution_time_in_minutes?: MinutesObject;
+            readonly reply_time_in_minutes?: MinutesObject;
+            readonly full_resolution_time_in_minutes?: MinutesObject;
+            readonly agent_wait_time_in_minutes?: MinutesObject;
+            readonly requester_wait_time_in_minutes?: MinutesObject;
+        }
+
+        interface ResponsePayload {
+            readonly ticket_metric: ResponseModel;
+        }
+
+        interface ListPayload {
+            readonly ticket_metrics: ReadonlyArray<ResponseModel>;
+        }
+    }
+}
+
+/**
+ * @see {@link https://developer.zendesk.com/rest_api/docs/support/users|Zendesk Users}
+ */
+export namespace Users {
+    interface Methods {
+        /** User Auth */
+        auth(cb: ZendeskCallback<unknown, unknown>): unknown;
+
+        /** Listing Users */
+        list(cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listByGroup(groupId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        listByOrganization(organizationId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+
+        /** Showing Users */
+        show(userId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+        showMany(userIds: ReadonlyArray<ZendeskID>, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+
+        /** Creating Users */
+        create(user: CreatePayload, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+        createMany(users: CreateManyPayload, cb: ZendeskCallback<unknown, unknown>): JobStatuses.ResponsePayload;
+        createOrUpdate(user: CreatePayload, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+        createOrUpdateMany(
+            users: CreateManyPayload,
+            cb: ZendeskCallback<unknown, unknown>
+        ): JobStatuses.ResponsePayload;
+
+        /** Updating Users */
+        update(userId: ZendeskID, user: UpdatePayload, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+        updateMany(
+            userIds: UpdateIdPayload,
+            users: UpdateManyPayload,
+            cb: ZendeskCallback<unknown, unknown>
+        ): JobStatuses.ResponsePayload;
+
+        /** Suspending Users */
+        suspend(userId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+        unsuspend(userId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+
+        /** Deleting Users */
+        delete(userId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): unknown;
+
+        /** Searching Users */
+        search(params: unknown, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+
+        /** Getting own User */
+        me(cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+
+        /** Merging Users */
+        merge(userId: ZendeskID, targetUserId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+
+        /** Changing User Password */
+        password(
+            userId: ZendeskID,
+            oldPassword: string,
+            newPassword: string,
+            cb: ZendeskCallback<unknown, unknown>
+        ): unknown;
+
+        /** Users Export */
+        incrementalInclude(startTime: number, include: unknown, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        incremental(startTime: number, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+        incrementalSample(startTime: number, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+    }
+
+    interface BaseModel {
+        email?: string | null;
+        alias?: string | null;
+        custom_role_id?: number | null;
+        details?: string | null;
+        external_id?: string | null;
+        locale_id?: number | null;
+        moderator?: boolean | null;
+        notes?: string | null;
+        only_private_comments?: boolean | null;
+        organization_id?: number | null;
+        default_group_id?: number | null;
+        phone?: string | null;
+        photo?: Attachments.Model | null;
+        restricted_agent?: boolean | null;
+        role?: Role | null;
+        signature?: string | null;
+        suspended?: boolean | null;
+        tags?: ReadonlyArray<unknown> | null;
+        ticket_restriction?: TicketRestriction | null;
+        time_zone?: string | null;
+        user_fields?: object | null;
+        verified?: boolean | null;
+    }
+
+    /**
+     * @see {@link https://developer.zendesk.com/rest_api/docs/support/users#create-user|Zendesk Users Create}
+     */
+    interface CreateModel extends BaseModel {
+        name: string;
+    }
+
+    /**
+     * @see {@link https://developer.zendesk.com/rest_api/docs/support/users#update-user|Zendesk Users Update}
+     */
+    interface UpdateModel extends BaseModel {
+        name?: string;
+    }
+
+    /**
+     * @see {@link https://developer.zendesk.com/rest_api/docs/support/users#json-format-for-agent-or-admin-requests|Zendesk Users JSON Format}
+     */
+    interface ResponseModel extends AuditableModel {
+        readonly email: string | null;
+        readonly name: string;
+        readonly active: boolean;
+        readonly alias: string | null;
+        readonly chat_only: boolean;
+        readonly custom_role_id: number | null;
+        readonly role_type: RoleType;
+        readonly details: string | null;
+        readonly external_id: string | null;
+        readonly last_login_at: string | null;
+        readonly locale: string | null;
+        readonly locale_id: number | null;
+        readonly moderator: boolean;
+        readonly notes: string | null;
+        readonly only_private_comments: boolean;
+        readonly organization_id: number | null;
+        readonly default_group_id: number | null;
+        readonly phone: string | null;
+        readonly shared_phone_number: boolean | null;
+        readonly photo: Attachments.Model | null;
+        readonly restricted_agent: boolean;
+        readonly role: Role;
+        readonly shared: boolean;
+        readonly shared_agent: boolean;
+        readonly signature: string | null;
+        readonly suspended: boolean;
+        readonly tags?: ReadonlyArray<unknown> | null;
+        readonly ticket_restriction: TicketRestriction | null;
+        readonly time_zone: string | null;
+        readonly two_factor_auth_enabled: boolean;
+        readonly url: string;
+        readonly user_fields?: object | null;
+        readonly verified: boolean;
+        readonly report_csv: boolean;
+    }
+
+    type UpdateIdPayload =
+        | string
+        | ReadonlyArray<ZendeskID>
+        | { ids: ReadonlyArray<ZendeskID> }
+        | { external_ids: ReadonlyArray<ZendeskID> };
+
+    interface CreatePayload {
+        user: CreateModel;
+    }
+
+    interface CreateManyPayload {
+        users: ReadonlyArray<CreateModel>;
+    }
+
+    interface UpdatePayload {
+        user: UpdateModel;
+    }
+
+    interface UpdateManyPayload {
+        users: ReadonlyArray<UpdateModel>;
+    }
+
+    interface ResponsePayload {
+        user: ResponseModel;
+    }
+
+    interface ListPayload extends PaginablePayload {
+        users: ReadonlyArray<ResponseModel>;
+    }
+
+    type Role = 'admin' | 'agent' | 'end-user';
+
+    /**
+     * Defines an agent type
+     * 0 - Custom
+     * 1 - Light
+     * 2 - Chat
+     */
+    type RoleType = 0 | 1 | 2;
+
+    type TicketRestriction = 'assigned' | 'groups' | 'organization' | 'requested';
+
+    /**
+     * @see {@link https://developer.zendesk.com/rest_api/docs/support/user_identities|Zendesk User Identities}
+     */
+    namespace Identities {
+        interface Methods {
+            /** Listing Identities */
+            list(userId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+
+            /** Viewing Identities */
+            show(userId: ZendeskID, identityId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+
+            /** Creating Identities */
+            create(userId: ZendeskID, identity: CreatePayload, cb: ZendeskCallback<unknown, unknown>): ResponseModel;
+
+            /** Updating Identities */
+            update(
+                userId: ZendeskID,
+                identityId: ZendeskID,
+                identity: UpdatePayload,
+                cb: ZendeskCallback<unknown, unknown>
+            ): ResponsePayload;
+            makePrimary(userId: ZendeskID, identityId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ListPayload;
+            verify(userId: ZendeskID, identityId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): ResponsePayload;
+            requestVerification(
+                userId: ZendeskID,
+                identityId: ZendeskID,
+                cb: ZendeskCallback<unknown, unknown>
+            ): unknown;
+
+            /** Deleting Identities */
+            delete(userId: ZendeskID, identityId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): unknown;
+        }
+
+        interface CreateModel {
+            type: IdentityType;
+            value: string;
+            verified?: boolean;
+            primary?: boolean;
+        }
+
+        interface UpdateModel {
+            value?: string;
+            verified?: boolean;
+        }
+
+        interface ResponseModel extends AuditableModel {
+            readonly url: string;
+            readonly user_id: ZendeskID;
+            readonly type: IdentityType;
+            readonly value: string;
+            readonly verified: boolean;
+            readonly primary: boolean;
+            readonly undeliverable_count: number;
+            readonly deliverable_state: DeliverableState;
+        }
+
+        interface CreatePayload {
+            readonly identity: CreateModel;
+        }
+
+        interface UpdatePayload {
+            readonly identity: UpdateModel;
+        }
+
+        interface ListPayload extends PaginablePayload {
+            readonly identities: ReadonlyArray<ResponseModel>;
+        }
+
+        interface ResponsePayload {
+            readonly identity: ResponseModel;
+        }
+
+        type IdentityType = 'agent_forwarding' | 'email' | 'facebook' | 'google' | 'phone_number' | 'sdk';
+
+        type DeliverableState = 'deliverable' | 'undeliverable';
+    }
+
+    namespace Fields {
+        interface Methods {
+            list(cb: ZendeskCallback<unknown, unknown>): unknown;
+            show(fieldId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): unknown;
+            create(field: unknown, cb: ZendeskCallback<unknown, unknown>): unknown;
+            update(fieldId: ZendeskID, field: unknown, cb: ZendeskCallback<unknown, unknown>): unknown;
+            delete(fieldId: ZendeskID, cb: ZendeskCallback<unknown, unknown>): unknown;
+        }
+    }
+}
+
+export interface PaginablePayload {
+    next_page: number | null;
+    previous_page: number | null;
+    count: number;
+}
+
+export interface PersistableModel {
+    readonly id: ZendeskID;
+}
+
+export interface TemporalModel extends PersistableModel {
+    readonly created_at: string;
+}
+
+export interface AuditableModel extends TemporalModel {
+    readonly updated_at: string | null;
+}
+
+export type ZendeskID = number;
diff --git a/types/node-zendesk/node-zendesk-tests.ts b/types/node-zendesk/node-zendesk-tests.ts
new file mode 100644
index 0000000000..838d7a36f8
--- /dev/null
+++ b/types/node-zendesk/node-zendesk-tests.ts
@@ -0,0 +1,92 @@
+import { Client, createClient, ZendeskID } from 'node-zendesk';
+
+const client: Client = createClient({
+    username: 'foo',
+    token: 'secret',
+    remoteUri: '/example',
+});
+
+const zendeskCallback = () => {};
+
+/** Job Statuses Methods */
+client.jobstatuses.show(123, zendeskCallback);
+client.jobstatuses.watch(123, 2, 3, zendeskCallback);
+
+/** Macros Methods */
+client.macros.applyTicket(123, 123, zendeskCallback);
+
+/** Requests Methods */
+client.requests.list(zendeskCallback);
+client.requests.listOpen(zendeskCallback);
+client.requests.listSolved(zendeskCallback);
+client.requests.listCCD(123, zendeskCallback);
+client.requests.listByUser(123, zendeskCallback);
+client.requests.listByOrganization(123, zendeskCallback);
+client.requests.getRequest(123, zendeskCallback);
+client.requests.create({ request: { subject: 'foo', comment: {} } }, zendeskCallback);
+client.requests.update(123, { request: {} }, zendeskCallback);
+client.requests.listComments(123, zendeskCallback);
+client.requests.getComment(123, 123, zendeskCallback);
+
+/** Tickets Methods */
+client.tickets.list(zendeskCallback);
+client.tickets.listByOrganization(123, zendeskCallback);
+client.tickets.listByUserRequested(123, zendeskCallback);
+client.tickets.listByUserCCD(123, zendeskCallback);
+client.tickets.listAssigned(123, zendeskCallback);
+client.tickets.listWithFilter('foo', 'bar', zendeskCallback);
+client.tickets.listRecent(zendeskCallback);
+client.tickets.listCollaborators(123, zendeskCallback);
+client.tickets.listIncidents(123, zendeskCallback);
+client.tickets.listMetrics(123, zendeskCallback);
+client.tickets.show(123, zendeskCallback);
+client.tickets.showMany([123, 234], zendeskCallback);
+client.tickets.create({ ticket: { comment: {} } }, zendeskCallback);
+client.tickets.createMany({ tickets: [{ comment: {} }] }, zendeskCallback);
+client.tickets.update(123, { ticket: {} }, zendeskCallback);
+client.tickets.updateMany({ tickets: [{}] }, zendeskCallback);
+client.tickets.delete(123, zendeskCallback);
+client.tickets.deleteMany([123, 234], zendeskCallback);
+client.tickets.merge(123, { ids: [234, 345] }, zendeskCallback);
+client.tickets.export(1332034771, zendeskCallback);
+client.tickets.exportSample(1332034771, {});
+client.tickets.incremental(1332034771, zendeskCallback);
+client.tickets.incrementalInclude(1332034771, {}, zendeskCallback);
+client.tickets.incrementalSample(1332034771, zendeskCallback);
+client.tickets.getComments(123, zendeskCallback);
+client.tickets.exportAudit(123, zendeskCallback);
+client.tickets.addTags(123, ['foo', 'bar'], zendeskCallback);
+
+/** Users Methods */
+client.users.auth(zendeskCallback);
+client.users.list(zendeskCallback);
+client.users.listByGroup(123, zendeskCallback);
+client.users.listByOrganization(123, zendeskCallback);
+client.users.show(123, zendeskCallback);
+client.users.showMany([123, 234], zendeskCallback);
+client.users.create({ user: { name: 'foo' } }, zendeskCallback);
+client.users.createMany({ users: [{ name: 'foo' }] }, zendeskCallback);
+client.users.createOrUpdate({ user: { name: 'foo' } }, zendeskCallback);
+client.users.createOrUpdateMany({ users: [{ name: 'foo' }] }, zendeskCallback);
+client.users.update(123, { user: {} }, zendeskCallback);
+client.users.updateMany([123, 234], { users: [{}, {}] }, zendeskCallback);
+client.users.suspend(123, zendeskCallback);
+client.users.unsuspend(123, zendeskCallback);
+client.users.delete(123, zendeskCallback);
+client.users.search({}, zendeskCallback);
+client.users.me(zendeskCallback);
+client.users.merge(123, 234, zendeskCallback);
+client.users.password(123, 'foo', 'bar', zendeskCallback);
+client.users.incrementalInclude(1332034771, {}, zendeskCallback);
+client.users.incremental(1332034771, zendeskCallback);
+client.users.incrementalSample(1332034771, zendeskCallback);
+
+/** User Identities Methods */
+client.useridentities.list(123, zendeskCallback);
+client.useridentities.show(123, 234, zendeskCallback);
+client.useridentities.create(123, { identity: { type: 'email', value: 'foo@example.com' } }, zendeskCallback);
+client.useridentities.update(123, 234, { identity: {} }, zendeskCallback);
+client.useridentities.makePrimary(123, 234, zendeskCallback);
+client.useridentities.verify(123, 234, zendeskCallback);
+client.useridentities.requestVerification(123, 234, zendeskCallback);
+client.useridentities.delete(123, 234, zendeskCallback);
diff --git a/types/node-zendesk/tsconfig.json b/types/node-zendesk/tsconfig.json
new file mode 100644
index 0000000000..9e4ac66f6e
--- /dev/null
+++ b/types/node-zendesk/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "node-zendesk-tests.ts"
+    ]
+}
diff --git a/types/node-zendesk/tslint.json b/types/node-zendesk/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/node-zendesk/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }