diff --git a/README.md b/README.md
index 41b4762..e3d8f1b 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ const work1 = new Worker({
     }); // work1 instance is ready for incoming new tasks
 ```
 
-\*\* file an issue if you think Worker should expose any other functionalities (for example, to have more control) .
+** file an issue if you think Worker should expose any other functionalities (for example, to have more control) .
 
 ```bash
   git clone https://github.com/queue-xec/worker
@@ -67,3 +67,90 @@ These info will saved and loaded (later) in .env file at root workers folder.
 </a>
 
 ### ⚠️ Under development ⚠️
+
+## API Documentation
+
+### `Worker` Class (src/index.js)
+
+The `Worker` class is the core component of the task processor node. It handles connections to the Master, requests and processes tasks, and manages task assets and dependencies.
+
+**Constructor:**
+
+```javascript
+new Worker({ token, name = 'no_name', loglevel, transferEncryptToken = null })
+```
+
+- `token` (String): Required. Token generated from the Master for peer connection. Can be passed in the constructor or as an environment variable `token`.
+- `name` (String): Optional. The name of the worker instance. Defaults to `'no_name'`.
+- `loglevel` (String): Optional. The logging level for the worker. Accepted values: `'off'`, `'info'`, `'warn'`, `'error'`, `'debug'`.
+- `transferEncryptToken` (String): Optional. Token generated from the Master to secure data communications.
+
+**Methods:**
+
+- `init(transferEncryptToken)`: Asynchronously initializes the worker, sets up event listeners, registers RPC calls, and instantiates the `Crypt` class.
+- `registerRPC()`: Registers RPC (Remote Procedure Call) methods with the peer. Currently, it responds to 'ping' calls with 'pong'.
+- `requestWork()`: Requests new tasks from the Master. If the worker is busy or the Master's address is not yet discovered, it will not make a request. It also handles processing of internally queued jobs.
+- `shareResults(results)`: Shares the results of a completed job back to the Master.
+- `onMessage(address, message)`: Callback function executed when a connected peer sends a message.
+- `onRpcCall(pk, call)`: Callback function executed when an RPC call is received from a peer.
+- `onSeen(newPeerAddress)`: Callback function executed when a new peer is discovered. It checks if the new peer is the Master and requests execution assets if so.
+- `saveAssets(files)`: Saves the received task asset files to the local file system.
+- `static installDependencies(deps)`: Asynchronously installs all announced dependencies from the Master.
+- `doJobs(job)`: Processes a given job. It instantiates the task class received from the Master and runs the task with the provided job data. Returns a Promise that resolves with the job results.
+- `checkCurrentAssets()`: Reads all execution asset files, calculates their SHA256 hashes, updates `this.execAssets.files`, and returns a unified hash of all known hashes.
+- `deleteExecAssets()`: Deletes currently known assets and their corresponding directories in case assets have changed.
+
+### `Logger` Class (src/Logger.js)
+
+The `Logger` class provides logging functionalities with different levels.
+
+**Constructor:**
+
+```javascript
+new Logger({ level = 'off', writeStream = false } = {})
+```
+
+- `level` (String): Optional. The logging level. Accepted values: `'off'`, `'info'`, `'warn'`, `'error'`, `'debug'`. Defaults to `'off'`.
+- `writeStream` (WritableStream): Optional. A writable stream to which log messages will be written. Defaults to `false`.
+
+**Methods:**
+
+- `translateToCode(level)`: Converts a human-readable log level string to its corresponding numerical code.
+- `info(msg, extra)`: Prints messages for the 'info' log level.
+- `warn(msg, extra)`: Prints messages for the 'warn' log level.
+- `error(msg, extra)`: Prints messages for the 'error' log level.
+- `fatal(msg, extra)`: Prints messages for the 'fatal' log level and exits the process.
+- `debug(msg, extra)`: Prints messages for the 'debug' log level.
+- `writeToFile(msg, extra = '')`: Writes log messages to the configured `writeStream` if available.
+
+### `Helper` Class (src/Helper.js)
+
+The `Helper` class provides utility functions.
+
+**Static Methods:**
+
+- `static LocalTime(timestamp)`: Formats a given timestamp into 'DD-MM HH:mm:ss' local time.
+- `static sleep(ms)`: Returns a Promise that resolves after a specified number of milliseconds.
+- `static getTimestamp()`: Returns the current timestamp.
+- `static mesurePerf(started)`: Calculates the performance difference from a given start timestamp.
+- `static getSha256(file)`: Calculates the SHA256 hash of a given file.
+- `static populateSha256OnAssets(arr)`: Populates the SHA256 hash for each asset in an array of asset objects.
+
+### `Crypt` Class (src/Crypt.js)
+
+The `Crypt` class provides encryption and decryption functionalities using AES-256-cbc.
+
+**Constructor:**
+
+```javascript
+new Crypt(key)
+```
+
+- `key` (String): Required. The encryption key (must be 32 characters long).
+
+**Methods:**
+
+- `encrypt(text)`: Encrypts the given text using AES-256-cbc. Returns an object containing the initialization vector (iv) and the encrypted data.
+- `decrypt(text)`: Decrypts the given text using AES-256-cbc.
+- `getKey()`: Returns the encryption key.
+- `getIv()`: Returns the initialization vector.