diff --git a/src/Nuxed/Contract/Http/Message/IServerRequest.hack b/src/Nuxed/Contract/Http/Message/IServerRequest.hack
index 7cbcd2b..af474bd 100644
--- a/src/Nuxed/Contract/Http/Message/IServerRequest.hack
+++ b/src/Nuxed/Contract/Http/Message/IServerRequest.hack
@@ -1,6 +1,6 @@
 namespace Nuxed\Contract\Http\Message;
 
-use namespace Nuxed\Contract\Http\{Flash, Server, Session};
+use namespace Nuxed\Contract\Http\{Flash, Session};
 
 /**
  * Representation of an incoming, server-side HTTP request.
@@ -209,21 +209,6 @@ interface IServerRequest extends IRequest {
    */
   public function withoutAttribute(string $attribute): this;
 
-  /**
-   * Return the http principal, which represent a user authenticated by HTTP Basic or
-   * Digest authentication. A null value indicates the absence of a user authentication.
-   */
-  public function getPrincipal(): ?Server\IHttpPrincipal;
-
-  /**
-   * Return an instance with the specified http principal implementation.
-   *
-   * This method MUST be implemented in such a way as to retain the
-   * immutability of the message, and MUST return an instance that has the
-   * http principal instance.
-   */
-  public function withPrincipal(Server\IHttpPrincipal $principal): this;
-
   /**
    * Return an instance with the specified session implementation.
    *
diff --git a/src/Nuxed/Contract/Http/Server/Authenticator/IAuthenticator.hack b/src/Nuxed/Contract/Http/Server/Authenticator/IAuthenticator.hack
deleted file mode 100644
index 032596d..0000000
--- a/src/Nuxed/Contract/Http/Server/Authenticator/IAuthenticator.hack
+++ /dev/null
@@ -1,9 +0,0 @@
-namespace Nuxed\Contract\Http\Server\Authenticator;
-
-use namespace Nuxed\Contract\Http\Message;
-
-interface IAuthenticator {
-  public function authenticate(
-    Message\IServerRequest $request,
-  ): Awaitable<Result\IResult>;
-}
diff --git a/src/Nuxed/Contract/Http/Server/Authenticator/Result/Failure.hack b/src/Nuxed/Contract/Http/Server/Authenticator/Result/Failure.hack
deleted file mode 100644
index 651939a..0000000
--- a/src/Nuxed/Contract/Http/Server/Authenticator/Result/Failure.hack
+++ /dev/null
@@ -1,17 +0,0 @@
-namespace Nuxed\Contract\Http\Server\Authenticator\Result;
-
-/**
- * Indicates an authentication failure.
- *
- * The authentication attempt has completed.
- */
-final class Failure implements IResult {
-  public function __construct(private int $responseCode) {}
-
-  /**
-   * returns the response code to send to the client.
-   */
-  public function getResponseCode(): int {
-    return $this->responseCode;
-  }
-}
diff --git a/src/Nuxed/Contract/Http/Server/Authenticator/Result/Result.hack b/src/Nuxed/Contract/Http/Server/Authenticator/Result/Result.hack
deleted file mode 100644
index e9512d8..0000000
--- a/src/Nuxed/Contract/Http/Server/Authenticator/Result/Result.hack
+++ /dev/null
@@ -1,4 +0,0 @@
-namespace Nuxed\Contract\Http\Server\Authenticator\Result;
-
-<<__Sealed(Success::class, Failure::class, Retry::class)>>
-interface IResult {}
diff --git a/src/Nuxed/Contract/Http/Server/Authenticator/Result/Retry.hack b/src/Nuxed/Contract/Http/Server/Authenticator/Result/Retry.hack
deleted file mode 100644
index 56364a7..0000000
--- a/src/Nuxed/Contract/Http/Server/Authenticator/Result/Retry.hack
+++ /dev/null
@@ -1,20 +0,0 @@
-namespace Nuxed\Contract\Http\Server\Authenticator\Result;
-
-/**
- * Indicates an authentication must be retried.
- *
- * The response code to be sent back is as returned from getResponseCode().
- *
- * The Authenticator must also have set any necessary response headers
- * before returning this Retry object.
- */
-final class Retry implements IResult {
-  public function __construct(private int $responseCode) {}
-
-  /**
-   * returns the response code to send to the client.
-   */
-  public function getResponseCode(): int {
-    return $this->responseCode;
-  }
-}
diff --git a/src/Nuxed/Contract/Http/Server/Authenticator/Result/Success.hack b/src/Nuxed/Contract/Http/Server/Authenticator/Result/Success.hack
deleted file mode 100644
index 9c6c695..0000000
--- a/src/Nuxed/Contract/Http/Server/Authenticator/Result/Success.hack
+++ /dev/null
@@ -1,18 +0,0 @@
-namespace Nuxed\Contract\Http\Server\Authenticator\Result;
-
-use namespace Nuxed\Contract\Http\Server;
-
-/**
- * Indicates an authentication has succeeded and the authenticated
- * user principal can be acquired by calling getPrincipal().
- */
-final class Success implements IResult {
-  public function __construct(private Server\IHttpPrincipal $httpPrincipal) {}
-
-  /**
-   * returns the authenticated user Principal
-   */
-  public function getPrincipal(): Server\IHttpPrincipal {
-    return $this->httpPrincipal;
-  }
-}
diff --git a/src/Nuxed/Contract/Http/Server/IHttpPrincipal.hack b/src/Nuxed/Contract/Http/Server/IHttpPrincipal.hack
deleted file mode 100644
index 61cd7fd..0000000
--- a/src/Nuxed/Contract/Http/Server/IHttpPrincipal.hack
+++ /dev/null
@@ -1,26 +0,0 @@
-namespace Nuxed\Contract\Http\Server;
-
-/**
- * Represents a user authenticated by HTTP Basic or Digest authentication.
- */
-interface IHttpPrincipal {
-  /**
-   * returns the contents of this principal in the form realm:username
-   */
-  public function getName(): string;
-
-  /**
-   * returns the realm this object was created with.
-   */
-  public function getRealm(): string;
-
-  /**
-   * returns the username this object was created with.
-   */
-  public function getUsername(): string;
-
-  /**
-   * returns a hashcode for this HttpPrincipal.
-   */
-  public function hashCode(): int;
-}
diff --git a/src/Nuxed/Contract/Http/Server/IServer.hack b/src/Nuxed/Contract/Http/Server/IServer.hack
deleted file mode 100644
index 4129e1a..0000000
--- a/src/Nuxed/Contract/Http/Server/IServer.hack
+++ /dev/null
@@ -1,41 +0,0 @@
-namespace Nuxed\Contract\Http\Server;
-
-interface IServer {
-  /**
-   * Sets the Authenticator for this server.
-   */
-  public function setAuthenticator(
-    ?Authenticator\IAuthenticator $authenticator,
-  ): void;
-
-  /**
-   * Sets the handler for this server.
-   */
-  public function setHandler(IHandler $handler): void;
-
-  /**
-   * Sets the middleware stack for this server.
-   */
-  public function setMiddlewareStack(IMiddlewareStack $middleware): void;
-
-  /**
-   * Binds this server to the given address and port number.
-   */
-  public function bind(string $address, int $port = 8080): void;
-
-  /**
-   * returns the address this server is listening on.
-   */
-  public function getAddress(): string;
-
-  /**
-   * Starts the server in the background.
-   */
-  public function start(): Awaitable<void>;
-
-  /**
-   * Stops this server by closing the listening socket and disallowing any new requests
-   * from being processed.
-   */
-  public function stop(int $deply = 0): Awaitable<void>;
-}