diff --git a/package.json b/package.json
index 70132a1a..e6baa8b5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bsv/spv-wallet-js-client",
-  "version": "1.0.0-beta.23",
+  "version": "1.0.0-beta.24",
   "description": "TypeScript library for connecting to a SPV Wallet server",
   "repository": {
     "type": "git",
diff --git a/src/client.ts b/src/client.ts
index 044011cb..f7b58ab9 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -31,6 +31,7 @@ import {
   PageModel,
   Utxo,
   MerkleRootsRepository,
+  QueryPageParams,
 } from './types';
 import { defaultLogger, Logger, LoggerConfig, makeLogger } from './logger';
 import { HttpClient } from './httpclient';
@@ -537,19 +538,14 @@ export class SpvWalletClient {
    * Get a list of all access keys for the current user, filtered by conditions, metadata and queryParams
    *
    * @param {AccessKeyFilter} conditions   Key value object to use to filter the documents
-   * @param {Metadata} metadata       Key value object to use to filter the documents by the metadata
    * @param {QueryParams} queryParams Database query parameters for page, page size and sorting
    * @return {PageModel<AccessKey>}
    */
-  async GetAccessKeys(
-    conditions: AccessKeyFilter,
-    metadata: Metadata,
-    queryParams: QueryParams,
-  ): Promise<PageModel<AccessKey>> {
+  async GetAccessKeys(conditions: AccessKeyFilter, queryParams: QueryPageParams): Promise<PageModel<AccessKey>> {
     const basePath = `users/current/keys`;
     const queryString = buildQueryPath({
       filter: conditions,
-      metadata: metadata,
+      metadata: {},
       page: queryParams,
     });
 
diff --git a/src/query/query-builder.ts b/src/query/query-builder.ts
index d777aee4..93f96190 100644
--- a/src/query/query-builder.ts
+++ b/src/query/query-builder.ts
@@ -1,5 +1,5 @@
-import { AccessKeyFilter, ContactFilter, ModelFilter, TransactionFilter, UtxoFilter, XpubFilter } from "../filters";
-import { Metadata, QueryParams as Page } from "../types";
+import { AccessKeyFilter, ContactFilter, ModelFilter, TransactionFilter, UtxoFilter, XpubFilter } from '../filters';
+import { Metadata, QueryParams as Page } from '../types';
 
 export interface BuildPathOptions {
   filter: ModelFilter | TransactionFilter | UtxoFilter | XpubFilter | AccessKeyFilter | ContactFilter;
@@ -11,6 +11,10 @@ function flattenParams(params: Record<string, any>, parentKey?: string): Record<
   const flattened: Record<string, string> = {};
 
   Object.entries(params).forEach(([key, value]) => {
+    if (!value) {
+      return;
+    }
+
     const newKey = parentKey ? `${parentKey}[${key}]` : key;
 
     if (typeof value === 'object' && value !== null && !Array.isArray(value)) {
diff --git a/src/types.ts b/src/types.ts
index 76492e20..fdcf02bf 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -64,50 +64,50 @@ export interface MerkleRootsRepository {
     "next_external_num": 229
   }
  */
-  export interface XPub {
-    /**
-     * metadata object
-     */
-    metadata?: Metadata;
-    /**
-     * xpub id
-     */
-    id: string;
-    /**
-     * Current balance in sats of the xpub
-     */
-    current_balance: number;
-    /**
-     * Next internal (change address) number to use for a new destination
-     *
-     * NOTE: Do not use this to create new destinations, always let SPV Wallet create the destination
-     */
-    next_internal_num: number;
-    /**
-     * Next external number to use for a new destination
-     *
-     * NOTE: Do not use this to create new destinations, always let SPV Wallet create the destination
-     */
-    next_external_num: number;
-    /**
-     * Date when this object was created
-     */
-    created_at?: Date;
-    /**
-     * Date when this object was last updated
-     */
-    updated_at?: Date;
-    /**
-     * If this object has been deleted, this date will be set
-     */
-    deleted_at?: Date;
-  }
-  
+export interface XPub {
+  /**
+   * metadata object
+   */
+  metadata?: Metadata;
+  /**
+   * xpub id
+   */
+  id: string;
+  /**
+   * Current balance in sats of the xpub
+   */
+  current_balance: number;
+  /**
+   * Next internal (change address) number to use for a new destination
+   *
+   * NOTE: Do not use this to create new destinations, always let SPV Wallet create the destination
+   */
+  next_internal_num: number;
+  /**
+   * Next external number to use for a new destination
+   *
+   * NOTE: Do not use this to create new destinations, always let SPV Wallet create the destination
+   */
+  next_external_num: number;
+  /**
+   * Date when this object was created
+   */
+  created_at?: Date;
   /**
-   * Array of xpubs
-   * @see {@link XPub}
+   * Date when this object was last updated
    */
-  export interface XPubs extends Array<XPub> {}
+  updated_at?: Date;
+  /**
+   * If this object has been deleted, this date will be set
+   */
+  deleted_at?: Date;
+}
+
+/**
+ * Array of xpubs
+ * @see {@link XPub}
+ */
+export interface XPubs extends Array<XPub> {}
 
 /**
  * Page interface
@@ -444,7 +444,6 @@ export interface OldUtxo {
  */
 export interface OldUtxos extends Array<OldUtxo> {}
 
-
 /**
  * Old paymail address interface for Admin endpoints (Deprecated)
  */
@@ -719,6 +718,16 @@ export interface QueryParams {
   sortDirection?: string;
 }
 
+/**
+ * Query page params to limit and order database list results.
+ */
+export interface QueryPageParams {
+  page?: number;
+  size?: number;
+  sort?: string;
+  sortBy?: string;
+}
+
 /**
  * SharedConfig defines the configuration shared by different parts of the application.
  */