sgcREST REST APIs, native in Delphi. OpenAPI built in.

uses
  sgcWebSocket_Server_API_OpenAPI, sgcHTTP_Server;
var
  OpenAPIServer: TsgcWSAPIServer_OpenAPI;
begin
  // OpenAPI server: load the contract, dispatch by operation id
  OpenAPIServer := TsgcWSAPIServer_OpenAPI.Create(nil);
  OpenAPIServer.Server := sgcHTTPServer1;
  OpenAPIServer.LoadFromFile('petstore.json');
  OpenAPIServer.OnRequest := OpenAPIServerRequest;

  sgcHTTPServer1.Port := 8080;
  sgcHTTPServer1.Active := True;
end;

procedure TForm1.OpenAPIServerRequest(Sender: TObject;
  const aOperationId: string; const aContext: TsgcOpenAPIServerContext;
  var Handled: Boolean);
begin
  if aOperationId = 'getPetById' then
  begin
    aContext.RespondJSON(200,
      '{"id":"' + aContext.PathParamAsString('petId') + '","name":"Rex"}');
    Handled := True;
  end;
end;

uses
  sgcHTTP_OpenAPI_Client;
var
  APIClient: TsgcOpenAPI_Client;
  Request: TsgcOpenAPIRequest;
  Response: TsgcOpenAPIResponse;
begin
  // OpenAPI client: call any OpenAPI-described API with basic auth
  APIClient := TsgcOpenAPI_Client.Create(nil);
  APIClient.SetBaseURL('https://api.example.com');
  APIClient.Authentication.Basic.Enabled := True;
  APIClient.Authentication.Basic.Username := 'apiuser';
  APIClient.Authentication.Basic.Password := '...';

  Request := TsgcOpenAPIRequest.Create;
  Response := TsgcOpenAPIResponse.Create;
  APIClient.HTTP_REQUEST(Request, Response);
end;