sgcOpenAPI Basta scrivere a mano i client REST. Specifica in ingresso, Pascal in uscita.

uses
  github;  // the unit you just generated

procedure TForm1.btnReposClick(Sender: TObject);
var
  oResponse: TsgcOpenAPI_reposlistforauthenticateduser_Response;
  oRepo: TsgcOpenAPI_repository_Class;
begin
  GetOpenAPIClient.Authentication.Token.BearerToken := 'ghp_...';

  oResponse := GetOpenAPIClient.reposlistforauthenticateduser(
    'private', 'owner', 'all', 'full_name', '', 100, 1);
  try
    if oResponse.IsSuccessful then
      for oRepo in oResponse.Successful.Items do
        Memo1.Lines.Add(oRepo.Full_name)
    else
      Memo1.Lines.Add(IntToStr(oResponse.ResponseCode) + ' ' +
        oResponse.ResponseError);
  finally
    oResponse.Free;
  end;
end;

uses
  sgcHTTP_Server, sgcHTTP_OpenAPI_Server, sgcWebSocket_Server_API_OpenAPI;

procedure TForm1.btnStartClick(Sender: TObject);
begin
  FServer := TsgcHTTPServer.Create(Self);
  FServer.Port := 8080;

  FOpenAPI := TsgcWSAPIServer_OpenAPI.Create(Self);
  FOpenAPI.OpenAPIOptions.Endpoint.ServeSpec := True;
  FOpenAPI.OpenAPIOptions.Endpoint.ServeSwaggerUI := True;
  FOpenAPI.OpenAPIOptions.Validation.ValidateRequest := True;
  FOpenAPI.LoadFromFile('petstore.json');
  FOpenAPI.OnRequest := OnOpenAPIRequest;
  FOpenAPI.Server := FServer;

  FServer.Active := True;
end;

// one event, dispatched by operation id
procedure TForm1.OnOpenAPIRequest(Sender: TObject;
  const aOperationId: string;
  const aContext: TsgcOpenAPIServerContext;
  var Handled: Boolean);
begin
  Handled := True;
  if aOperationId = 'getPetById' then
    aContext.RespondJSON(200,
      FPets.Values[aContext.PathParamAsString('petId')])
  else
    Handled := False;
end;