diff --git a/pom.xml b/pom.xml
index 037040c..fcc9862 100644
--- a/pom.xml
+++ b/pom.xml
@@ -61,6 +61,7 @@
     <lombok.version>1.18.38</lombok.version>
     <maven.compiler.plugin.version>3.14.0</maven.compiler.plugin.version>
     <moshi.version>1.15.2</moshi.version>
+    <okhttp.version>4.12.0</okhttp.version>
   </properties>
 
   <dependencies>
@@ -69,6 +70,11 @@
       <artifactId>moshi</artifactId>
       <version>${moshi.version}</version>
     </dependency>
+    <dependency>
+      <groupId>com.squareup.okhttp3</groupId>
+      <artifactId>okhttp</artifactId>
+      <version>${okhttp.version}</version>
+    </dependency>
     <dependency>
       <groupId>org.apache.httpcomponents.core5</groupId>
       <artifactId>httpcore5</artifactId>
diff --git a/src/main/java/dev/resms/core/mapper/IMapper.java b/src/main/java/dev/resms/core/mapper/IMapper.java
new file mode 100644
index 0000000..46fc088
--- /dev/null
+++ b/src/main/java/dev/resms/core/mapper/IMapper.java
@@ -0,0 +1,23 @@
+package dev.resms.core.mapper;
+
+/** An interface for mapping between JSON representation and Java objects using Moshi. */
+public interface IMapper {
+
+  /**
+   * Converts the provided object into its JSON representation.
+   *
+   * @param object The object to be converted to JSON.
+   * @return The JSON representation of the object.
+   */
+  String toJson(Object object);
+
+  /**
+   * Converts the provided JSON value into an instance of the specified class.
+   *
+   * @param value The JSON value to be converted.
+   * @param clazz The class to convert the JSON value to.
+   * @param <T> The type of the resulting object.
+   * @return An instance of the specified class with values from the JSON value.
+   */
+  <T> T fromJson(String value, Class<T> clazz);
+}
diff --git a/src/main/java/dev/resms/core/mapper/ReSMSMapper.java b/src/main/java/dev/resms/core/mapper/ReSMSMapper.java
new file mode 100644
index 0000000..2040e44
--- /dev/null
+++ b/src/main/java/dev/resms/core/mapper/ReSMSMapper.java
@@ -0,0 +1,46 @@
+package dev.resms.core.mapper;
+
+import com.squareup.moshi.Moshi;
+import java.io.IOException;
+
+/**
+ * Implementation of the IMapper interface for mapping between JSON representation and Java objects
+ * using Moshi.
+ */
+public class ReSMSMapper implements IMapper {
+
+  private final Moshi moshi;
+
+  public ReSMSMapper() {
+    this.moshi = new Moshi.Builder().build();
+  }
+
+  /**
+   * Converts the provided object into its JSON representation.
+   *
+   * @param object The object to be converted to JSON.
+   * @return The JSON representation of the object.
+   */
+  @Override
+  public String toJson(Object object) {
+    return moshi.adapter(Object.class).toJson(object);
+  }
+
+  /**
+   * Converts the provided JSON value into an instance of the specified class.
+   *
+   * @param value The JSON value to be converted.
+   * @param clazz The class to convert the JSON value to.
+   * @param <T> The type of the resulting object.
+   * @return An instance of the specified class with values from the JSON value.
+   */
+  @Override
+  public <T> T fromJson(String value, Class<T> clazz) {
+    try {
+      return moshi.adapter(clazz).fromJson(value);
+    } catch (IOException e) {
+      e.printStackTrace();
+      return null;
+    }
+  }
+}
diff --git a/src/main/java/dev/resms/core/net/AbstractHttpResponse.java b/src/main/java/dev/resms/core/net/AbstractHttpResponse.java
new file mode 100644
index 0000000..1b949d5
--- /dev/null
+++ b/src/main/java/dev/resms/core/net/AbstractHttpResponse.java
@@ -0,0 +1,25 @@
+package dev.resms.core.net;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * Represents an HTTP response containing the response code, body, and success status.
+ *
+ * @param <T> The type of the response body.
+ */
+@Getter
+@Setter
+@AllArgsConstructor
+public class AbstractHttpResponse<T> {
+
+  /** The HTTP response code. */
+  private int code;
+
+  /** The response body. */
+  private T body;
+
+  /** Indicates whether the HTTP request was successful. */
+  private boolean isSuccessful;
+}
diff --git a/src/main/java/dev/resms/core/net/HttpMethod.java b/src/main/java/dev/resms/core/net/HttpMethod.java
new file mode 100644
index 0000000..fd75db3
--- /dev/null
+++ b/src/main/java/dev/resms/core/net/HttpMethod.java
@@ -0,0 +1,7 @@
+package dev.resms.core.net;
+
+/** An enumeration representing common HTTP methods. */
+public enum HttpMethod {
+  GET,
+  POST,
+}
diff --git a/src/main/java/dev/resms/core/net/IHttpClient.java b/src/main/java/dev/resms/core/net/IHttpClient.java
new file mode 100644
index 0000000..426bf0b
--- /dev/null
+++ b/src/main/java/dev/resms/core/net/IHttpClient.java
@@ -0,0 +1,21 @@
+package dev.resms.core.net;
+
+/**
+ * An interface representing an HTTP client for performing HTTP requests and receiving responses.
+ *
+ * @param <T> The type of response data expected.
+ */
+public interface IHttpClient<T> {
+
+  /**
+   * Perform an HTTP request with the specified path, method, and payload.
+   *
+   * @param path The path or endpoint of the request.
+   * @param apiKey The API Key used to authenticate the request.
+   * @param method The HTTP method (GET, POST, PUT, DELETE, etc.).
+   * @param payload The payload or data to send with the request.
+   * @return An {@link AbstractHttpResponse} representing the response from the server.
+   */
+  AbstractHttpResponse<T> perform(
+      final String path, final String apiKey, final HttpMethod method, final String payload);
+}
diff --git a/src/main/java/dev/resms/core/net/impl/HttpClient.java b/src/main/java/dev/resms/core/net/impl/HttpClient.java
new file mode 100644
index 0000000..0e35438
--- /dev/null
+++ b/src/main/java/dev/resms/core/net/impl/HttpClient.java
@@ -0,0 +1,64 @@
+package dev.resms.core.net.impl;
+
+import dev.resms.core.net.AbstractHttpResponse;
+import dev.resms.core.net.HttpMethod;
+import dev.resms.core.net.IHttpClient;
+import java.io.IOException;
+import okhttp3.MediaType;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.RequestBody;
+import okhttp3.Response;
+
+/**
+ * An implementation of the {@link IHttpClient} interface for performing HTTP requests. This
+ * implementation uses the OkHttp library for handling HTTP communication.
+ */
+public class HttpClient implements IHttpClient<Response> {
+
+  /** The base URL for the API. */
+  public static final String BASE_API = "https://api.resms.dev/";
+
+  /** The OkHttpClient instance for handling HTTP requests. */
+  private final OkHttpClient httpClient;
+
+  /** Constructs an instance of the HttpClient. */
+  public HttpClient() {
+    this.httpClient = new OkHttpClient();
+  }
+
+  /**
+   * Performs an HTTP request with the specified path, HTTP method, and payload.
+   *
+   * @param path The path or endpoint of the request.
+   * @param apiKey The API Key used to authenticate the request.
+   * @param method The HTTP method (GET, POST, PUT, DELETE, etc.).
+   * @param payload The payload or data to send with the request.
+   * @return An {@link AbstractHttpResponse} representing the response from the server.
+   */
+  @Override
+  public AbstractHttpResponse<Response> perform(
+      final String path, final String apiKey, final HttpMethod method, final String payload) {
+
+    RequestBody requestBody = null;
+    if (payload != null) {
+      requestBody = RequestBody.create(payload, MediaType.get("application/json"));
+    }
+
+    Request request =
+        new Request.Builder()
+            .url(BASE_API + path)
+            .addHeader("Accept", "application/json")
+            .addHeader("X-Api-Key", apiKey)
+            .method(method.name(), requestBody)
+            .build();
+
+    try {
+      Response response = httpClient.newCall(request).execute();
+      return new AbstractHttpResponse(
+          response.code(), response.body().string(), response.isSuccessful());
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+  }
+}
diff --git a/src/main/java/dev/resms/core/service/BaseService.java b/src/main/java/dev/resms/core/service/BaseService.java
new file mode 100644
index 0000000..dbd82f2
--- /dev/null
+++ b/src/main/java/dev/resms/core/service/BaseService.java
@@ -0,0 +1,35 @@
+package dev.resms.core.service;
+
+import dev.resms.core.mapper.ReSMSMapper;
+import dev.resms.core.net.IHttpClient;
+import dev.resms.core.net.impl.HttpClient;
+import lombok.Getter;
+
+/**
+ * An abstract base class for service implementations, providing common functionality such as HTTP
+ * client, authentication provider, and mapper initialization.
+ */
+@Getter
+public abstract class BaseService {
+
+  /** Apikey used for authenticating requests. */
+  protected final String apiKey;
+
+  /** HTTP client for making HTTP requests. */
+  protected final IHttpClient httpClient;
+
+  /** Mapper responsible for mapping data between different representations. */
+  protected final ReSMSMapper reSMSMapper;
+
+  /**
+   * Constructs a BaseService instance with the specified authentication provider, default HTTP
+   * client, and mapper.
+   *
+   * @param apiKey The apiKey to use.
+   */
+  protected BaseService(final String apiKey) {
+    this.apiKey = apiKey;
+    this.httpClient = new HttpClient();
+    this.reSMSMapper = new ReSMSMapper();
+  }
+}