fixing main licence file, adding README

Author: StefanoMarzo

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2024 Stefano Marzo
+Copyright (c) 2024 CERN
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -4,5 +4,124 @@ SPDX-FileCopyrightText: 2025 CERN
 SPDX-License-Identifier: MIT
 -->
 
-# React OpenApi Hook
-Please find here an example of use: https://github.com/StefanoMarzo/react-openapi-generator-hook-demo
+# `react-openapi-generator-hook`
+
+A lightweight React hook utility for calling API methods generated from OpenAPI specifications. Simplify your frontend API integration by using a consistent, declarative hook-based approach — without manually instantiating and managing API clients.
+
+## 🚀 Features
+
+* ⚛️ React-first API interaction with minimal boilerplate
+* 🔄 Built-in support for async states: `loading`, `data`, and `error`
+* ⚙️ Support for multiple API configurations and endpoints
+* ✅ Compatible with OpenAPI Generator's generated `*ApiFactory` functions
+
+## 🧩 Installation
+
+```bash
+npm install react-openapi-generator-hook
+```
+
+## 🛠️ Basic Usage
+
+```tsx
+import { useApi, OpenApiProvider } from 'react-openapi-generator-hook'
+import { PetApiFactory, Configuration } from './generated'
+import axios from 'axios'
+
+// Setup config
+const axiosInstance = axios.create({ withCredentials: true }) // custom headers here
+const configMap = {
+  PETS: {
+    axiosInstance,
+    configuration: new Configuration({ accessToken: '1234567890' }),
+    baseUrl: 'https://petstore3.swagger.io/api/v3',
+  },
+  USERS: {
+    axiosInstance,
+    configuration: new Configuration({ accessToken: '0123456789' }),
+    baseUrl: 'https://users.cern.ch/api/v3',
+  }
+}
+
+// Wrap your app or your components
+<OpenApiProvider defaultConfigurationId="PETS" openApiConfigurationMap={configMap}>
+  <App />
+</OpenApiProvider>
+```
+Within your component
+```tsx
+// E.g. PetComponent.tsx
+const [{ data, error, loading }, fetchPet] = useApi({
+  apiFactory: PetApiFactory,
+  methodName: 'getPetById',
+  requestParameters: 4,
+})
+
+return (
+  <div>
+    {loading && 'Loading...'}
+    {error && <div>Error: {error.message}</div>}
+    {data && <div>Pet name: {data.name}</div>}
+  </div>
+)
+```
+
+## 📦 API
+
+### `useApi`
+
+A custom hook for invoking a specific API method from an OpenAPI-generated factory.
+
+**Parameters:**
+
+```ts
+{
+  apiFactory: (config: Configuration) => any,     // The API factory to use
+  methodName: string,                             // Name of the method to invoke
+  requestParameters?: any,                        // Parameters to pass to the method
+},
+{
+  manual?: boolean                                // if true, does not send request on component mount
+  configurationId?: string                        // (Optional) Configuration key to use
+}
+```
+
+**Returns:**
+
+```ts
+[
+  { data, error, loading },  // Result state
+  refetch                    // Function to manually re-trigger the call
+]
+```
+
+### `OpenApiProvider`
+
+A context provider that supplies configuration for all `useApi` calls.
+
+**Props:**
+
+* `defaultConfigurationId: string` – (optional) the default API to use
+* `openApiConfigurationMap: Record<string, OpenApiConfigurationType>` – a map of configurations:
+
+    * `axiosInstance`: Axios instance to use
+    * `configuration`: OpenAPI `Configuration` object (with accessToken, etc.)
+    * `baseUrl`: Base URL of the API
+
+
+You can also extend this setup to dynamically refresh tokens or inject headers as needed via `axios`.
+
+## 🧪 Example Project
+
+A guided example project showing how to use the hook is available here:
+👉 [react-openapi-generator-hook-demo](./examples/demo)
+
+## 🧱 Built With
+
+* [React](https://reactjs.org)
+* [Axios](https://axios-http.com)
+* [OpenAPI Generator](https://openapi-generator.tech/)
+
+## 📃 License
+
+MIT © CERN