diff --git a/api/main.tsp b/api/main.tsp
index 9bda230..4519a27 100644
--- a/api/main.tsp
+++ b/api/main.tsp
@@ -48,22 +48,6 @@ model HourlyForecastList {
   items: HourlyForecast[];
 }
 
-model CreateForecastRequest {
-  time: offsetDateTime;
-
-  @doc("하루 동안의 예상 최고 기온(℃)")
-  high?: Celsius;
-
-  @doc("하루 동안의 예상 최저 기온(℃)")
-  low?: Celsius;
-
-  @doc("예상 기온(℃)")
-  temperature?: Celsius;
-
-  @doc("예상 날씨 상태")
-  condition: WeatherCondition;
-}
-
 @error
 model Error {
   @doc("에러 코드")
@@ -76,15 +60,6 @@ model Error {
 @route("/forecasts")
 @tag("Forecasts")
 interface Forecasts {
-  @post
-  @doc("internal API to create a forecast")
-  createForecast(@body body: CreateForecastRequest): {
-    @statusCode statusCode: 204;
-  } | {
-    @statusCode statusCode: 500;
-    @body body: Error;
-  };
-
   @get
   @route("/daily")
   listDaily(): {