diff --git a/.github/workflows/get-api-diff.yml b/.github/workflows/get-api-diff.yml
index 8e3437ad86f3..f097541e3590 100644
--- a/.github/workflows/get-api-diff.yml
+++ b/.github/workflows/get-api-diff.yml
@@ -17,21 +17,6 @@ jobs:
       matrix:
         node-version: [20.5.1]
 
-    services:
-      db:
-        image: postgres:13
-        ports:
-          - 5432:5432
-        env:
-          POSTGRES_DB: misskey
-          POSTGRES_HOST_AUTH_METHOD: trust
-          POSTGRES_USER: example-misskey-user
-          POSTGRESS_PASS: example-misskey-pass
-      redis:
-        image: redis:7
-        ports:
-          - 6379:6379
-
     steps:
     - uses: actions/checkout@v4.1.1
       with:
@@ -52,43 +37,17 @@ jobs:
     - run: pnpm i --frozen-lockfile
     - name: Check pnpm-lock.yaml
       run: git diff --exit-code pnpm-lock.yaml
-    - name: Copy Configure
-      run: cp .config/example.yml .config/default.yml
     - name: Build
       run: pnpm build
-    - name : Migrate
-      run: pnpm migrate
-    - name: Launch misskey
-      run: |
-        screen -S misskey -dm pnpm run dev
-        sleep 30s
-    - name: Wait for Misskey to be ready
-      run: |
-        MAX_RETRIES=12
-        RETRY_DELAY=5
-        count=0
-        until $(curl --output /dev/null --silent --head --fail http://localhost:3000) || [[ $count -eq $MAX_RETRIES ]]; do
-          printf '.'
-          sleep $RETRY_DELAY
-          count=$((count + 1))
-        done
-
-        if [[ $count -eq $MAX_RETRIES ]]; then
-          echo "Failed to connect to Misskey after $MAX_RETRIES attempts."
-          exit 1
-        fi
-    - id: fetch
-      name: Get api.json from Misskey
-      run: |
-        RESULT=$(curl --retry 5 --retry-delay 5 --retry-max-time 60 http://localhost:3000/api.json)
-        echo $RESULT > api-base.json
+    - name: Generate API JSON
+      run: pnpm --filter backend generate-api-json
+    - name: Copy API.json
+      run: cp packages/backend/built/api.json api-base.json
     - name: Upload Artifact
       uses: actions/upload-artifact@v3
       with:
         name: api-artifact
         path: api-base.json
-    - name: Kill Misskey Job
-      run: screen -S misskey -X quit
 
   get-head:
     runs-on: ubuntu-latest
@@ -99,21 +58,6 @@ jobs:
       matrix:
         node-version: [20.5.1]
 
-    services:
-      db:
-        image: postgres:13
-        ports:
-          - 5432:5432
-        env:
-          POSTGRES_DB: misskey
-          POSTGRES_HOST_AUTH_METHOD: trust
-          POSTGRES_USER: example-misskey-user
-          POSTGRESS_PASS: example-misskey-pass
-      redis:
-        image: redis:7
-        ports:
-          - 6379:6379
-
     steps:
     - uses: actions/checkout@v4.1.1
       with:
@@ -134,43 +78,17 @@ jobs:
     - run: pnpm i --frozen-lockfile
     - name: Check pnpm-lock.yaml
       run: git diff --exit-code pnpm-lock.yaml
-    - name: Copy Configure
-      run: cp .config/example.yml .config/default.yml
     - name: Build
       run: pnpm build
-    - name : Migrate
-      run: pnpm migrate
-    - name: Launch misskey
-      run: |
-        screen -S misskey -dm pnpm run dev
-        sleep 30s
-    - name: Wait for Misskey to be ready
-      run: |
-        MAX_RETRIES=12
-        RETRY_DELAY=5
-        count=0
-        until $(curl --output /dev/null --silent --head --fail http://localhost:3000) || [[ $count -eq $MAX_RETRIES ]]; do
-          printf '.'
-          sleep $RETRY_DELAY
-          count=$((count + 1))
-        done
-
-        if [[ $count -eq $MAX_RETRIES ]]; then
-          echo "Failed to connect to Misskey after $MAX_RETRIES attempts."
-          exit 1
-        fi
-    - id: fetch
-      name: Get api.json from Misskey
-      run: |
-        RESULT=$(curl --retry 5 --retry-delay 5 --retry-max-time 60 http://localhost:3000/api.json)
-        echo $RESULT > api-head.json
+    - name: Generate API JSON
+      run: pnpm --filter backend generate-api-json
+    - name: Copy API.json
+      run: cp packages/backend/built/api.json api-head.json
     - name: Upload Artifact
       uses: actions/upload-artifact@v3
       with:
         name: api-artifact
         path: api-head.json
-    - name: Kill Misskey Job
-      run: screen -S misskey -X quit
 
   save-pr-number:
     runs-on: ubuntu-latest