diff --git a/.changeset/grumpy-llamas-stand.md b/.changeset/grumpy-llamas-stand.md
new file mode 100644
index 0000000..7e2a4c3
--- /dev/null
+++ b/.changeset/grumpy-llamas-stand.md
@@ -0,0 +1,5 @@
+---
+"@musica-sacra/api": major
+---
+
+Fix type of getList method. Add helpers for stringifying params for axios requests.
diff --git a/.changeset/tangy-brooms-eat.md b/.changeset/tangy-brooms-eat.md
new file mode 100644
index 0000000..cf43f2e
--- /dev/null
+++ b/.changeset/tangy-brooms-eat.md
@@ -0,0 +1,5 @@
+---
+"@musica-sacra/api": major
+---
+
+Create new plugin musica-sacra/api
diff --git a/packages/api/README.md b/packages/api/README.md
index f5259c8..b27d8c4 100644
--- a/packages/api/README.md
+++ b/packages/api/README.md
@@ -1 +1,8 @@
-# @musica-sacra/api
\ No newline at end of file
+# @musica-sacra/api
+
+ReactQuery and Axios based complex system that provides classes and hooks for handling API requests.
+With typescript support. 
+
+## Installation
+
+`npm install @musica-sacra/api`
\ No newline at end of file
diff --git a/packages/api/src/helpers/helpers.ts b/packages/api/src/helpers/helpers.ts
new file mode 100644
index 0000000..ef98a0f
--- /dev/null
+++ b/packages/api/src/helpers/helpers.ts
@@ -0,0 +1,7 @@
+export function stringifyArrayParam(
+    paramValues?: (string | number | boolean)[]
+) {
+    if (!paramValues) return '';
+
+    return paramValues.map(String).join(',');
+}
diff --git a/packages/api/src/hooks/useGetList.ts b/packages/api/src/hooks/useGetList.ts
index 39f0313..4ea6a85 100644
--- a/packages/api/src/hooks/useGetList.ts
+++ b/packages/api/src/hooks/useGetList.ts
@@ -9,7 +9,7 @@ import { BaseService } from '../service/BaseService';
 export function useGetList<T = any>(
     url: string,
     key: string,
-    params?: Record<string, any>
+    params?: Record<string, string>
 ) {
     const { addNotification } = useContext(NotificationsContext);
 
diff --git a/packages/api/src/main.ts b/packages/api/src/main.ts
index 4835e2f..5ac4373 100644
--- a/packages/api/src/main.ts
+++ b/packages/api/src/main.ts
@@ -3,3 +3,5 @@ export { useGetById } from './hooks/useGetById';
 
 export { AbstractService } from './service/AbstractService';
 export { BaseService } from './service/BaseService';
+
+export { stringifyArrayParam } from './helpers/helpers';
diff --git a/packages/api/src/service/BaseService.ts b/packages/api/src/service/BaseService.ts
index c91134b..9fd190e 100644
--- a/packages/api/src/service/BaseService.ts
+++ b/packages/api/src/service/BaseService.ts
@@ -7,7 +7,7 @@ export class BaseService<
     T = any,
     R = Record<string, any>,
 > extends AbstractService {
-    async getList(url: string, params?: Record<string, any>) {
+    async getList(url: string, params?: Record<string, string>) {
         return await axios.get<WithItems<T, R>>(url, {
             params,
             ...this.getHeaders(),