diff --git a/.github/workflows/rpc_healthcheck.yml b/.github/workflows/rpc_healthcheck.yml
new file mode 100644
index 00000000..cd08d189
--- /dev/null
+++ b/.github/workflows/rpc_healthcheck.yml
@@ -0,0 +1,248 @@
+name: RPC Healthcheck
+
+permissions:
+  contents: read  
+  pull-requests: write
+
+on:
+  schedule:
+    - cron: '41 2 * * *'
+    - cron: '41 10 * * *'
+    - cron: '41 18 * * *'
+  workflow_dispatch:
+
+
+jobs:
+  check-networkinfo:
+    name: Check ${{ matrix.network }} networkInfo
+    if: ${{ github.repository == 'QuarkChain/goquarkchain' }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - network: mainnet
+            rpc_url: https://rpc.indexer.mainnet.quarkchain.io:38391
+            expected_network_id: "0x1"
+          - network: devnet
+            rpc_url: https://rpc.indexer.devnet.quarkchain.io:38392
+            expected_network_id: "0xff"
+          - network: mainnetHost
+            rpc_url: http://65.108.121.223:38391
+            expected_network_id: "0x1"
+          - network: devnetHost
+            rpc_url: http://50.112.62.65:38391
+            expected_network_id: "0xff"
+
+    steps:
+      - name: Check endpoint JSON field
+        shell: bash
+        env:
+          RPC_URL: ${{ matrix.rpc_url }}
+          EXPECTED_NETWORK_ID: ${{ matrix.expected_network_id }}
+          NETWORK_NAME: ${{ matrix.network }}
+        run: |
+          set -euo pipefail
+
+          payload='{"jsonrpc":"2.0","id":"id","method":"networkInfo","params":[]}'
+          resp_file="${RUNNER_TEMP}/networkinfo_${NETWORK_NAME}.json"
+          report_file="${RUNNER_TEMP}/networkinfo_report_${NETWORK_NAME}.json"
+          : > "$resp_file"
+
+          code="$(
+            curl --silent --show-error --location \
+              --retry 3 --retry-delay 5 --retry-all-errors \
+              --connect-timeout 10 --max-time 30 \
+              -X POST \
+              -H 'Content-Type: application/json' \
+              --data "$payload" \
+              --output "$resp_file" --write-out '%{http_code}' \
+              "$RPC_URL" \
+              || echo '000'
+          )"
+
+          result="success"
+          error_msg=""
+
+          if [[ "$code" != "200" ]]; then
+            result="failure"
+            error_msg="HTTP status not 200: $code"
+          elif ! jq -e --arg expected "$EXPECTED_NETWORK_ID" '.result.networkId == $expected' "$resp_file" > /dev/null; then
+            result="failure"
+            error_msg="JSON check failed: .result.networkId == $EXPECTED_NETWORK_ID"
+          fi
+
+          jq -n \
+            --arg network "$NETWORK_NAME" \
+            --arg rpc_url "$RPC_URL" \
+            --arg result "$result" \
+            --arg error "$error_msg" \
+            '{network: $network, rpc_url: $rpc_url, result: $result, error: $error}' > "$report_file"
+
+          if [[ "$result" != "success" ]]; then
+            echo "[$NETWORK_NAME] $error_msg"
+            cat "$resp_file"
+            exit 1
+          fi
+
+          echo "[$NETWORK_NAME] JSON check passed: .result.networkId == $EXPECTED_NETWORK_ID"
+
+      - name: Upload endpoint report
+        if: ${{ always() }}
+        uses: actions/upload-artifact@v4
+        with:
+          name: rpc-healthcheck-${{ matrix.network }}
+          path: ${{ runner.temp }}/networkinfo_report_${{ matrix.network }}.json
+          if-no-files-found: error
+
+  notify:
+    name: Notify (email)
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    needs:
+      - check-networkinfo
+    if: ${{ always() && github.repository == 'QuarkChain/goquarkchain' }}
+
+    steps:
+      - name: Download endpoint reports
+        uses: actions/download-artifact@v4
+        with:
+          pattern: rpc-healthcheck-*
+          merge-multiple: true
+          path: ${{ runner.temp }}/rpc-healthcheck
+
+      - name: Compose email
+        id: compose
+        shell: bash
+        env:
+          EVENT_NAME: ${{ github.event_name }}
+          EVENT_SCHEDULE: ${{ github.event.schedule }}
+          CHECK_RESULT: ${{ needs.check-networkinfo.result }}
+          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
+        run: |
+          set -euo pipefail
+          send=false
+          overall="OK"
+          report_dir="${RUNNER_TEMP}/rpc-healthcheck"
+
+          table_rows_with_error=''
+          table_rows_no_error=''
+          html_rows_with_error=''
+          html_rows_no_error=''
+
+          shopt -s nullglob
+          report_files=("$report_dir"/*.json)
+          if [[ ${#report_files[@]} -eq 0 ]]; then
+            overall="FAILED"
+            send=true
+            table_rows_with_error='| unknown | unknown | failure | missing endpoint report artifact |'
+            html_rows_with_error='<tr><td>unknown</td><td>unknown</td><td>failure</td><td>missing endpoint report artifact</td></tr>'
+          else
+            for f in "${report_files[@]}"; do
+              network="$(jq -r '.network' "$f")"
+              rpc_url="$(jq -r '.rpc_url' "$f")"
+              result="$(jq -r '.result' "$f")"
+              error="$(jq -r '.error' "$f")"
+
+              if [[ "$result" != "success" ]]; then
+                overall="FAILED"
+                send=true
+                if [[ -z "$error" ]]; then
+                  error="unknown error"
+                fi
+              else
+                if [[ -z "$error" ]]; then
+                  error="-"
+                fi
+              fi
+
+              # Escape markdown table special chars
+              rpc_url="${rpc_url//|/\\|}"
+              error="${error//|/\\|}"
+              table_rows_with_error+="| ${network} | ${rpc_url} | ${result} | ${error} |\n"
+              table_rows_no_error+="| ${network} | ${rpc_url} | ${result} |\n"
+
+              network_html="${network//&/&amp;}"
+              network_html="${network_html//</&lt;}"
+              network_html="${network_html//>/&gt;}"
+              rpc_url_html="${rpc_url//&/&amp;}"
+              rpc_url_html="${rpc_url_html//</&lt;}"
+              rpc_url_html="${rpc_url_html//>/&gt;}"
+              result_html="${result//&/&amp;}"
+              result_html="${result_html//</&lt;}"
+              result_html="${result_html//>/&gt;}"
+              error_html="${error//&/&amp;}"
+              error_html="${error_html//</&lt;}"
+              error_html="${error_html//>/&gt;}"
+              html_rows_with_error+="<tr><td>${network_html}</td><td>${rpc_url_html}</td><td>${result_html}</td><td>${error_html}</td></tr>"
+              html_rows_no_error+="<tr><td>${network_html}</td><td>${rpc_url_html}</td><td>${result_html}</td></tr>"
+            done
+          fi
+
+          if [[ "$CHECK_RESULT" != "success" ]]; then
+            overall="FAILED"
+            send=true
+          else
+            # Success: send only on manual trigger, or once per day for scheduled runs.
+            if [[ "$EVENT_NAME" == "workflow_dispatch" ]]; then
+              send=true
+            elif [[ "$EVENT_NAME" == "schedule" ]]; then
+              if [[ "${EVENT_SCHEDULE:-}" == "41 18 * * *" ]]; then
+                send=true
+              fi
+            fi
+          fi
+          if [[ "$overall" == "OK" ]]; then
+            subject="✅ QuarkChain RPC Healthcheck OK"
+          else
+            subject="❌ QuarkChain RPC Healthcheck FAILED"
+          fi
+
+          echo "send=$send" >> "$GITHUB_OUTPUT"
+          echo "subject=$subject" >> "$GITHUB_OUTPUT"
+          echo "body<<EOF" >> "$GITHUB_OUTPUT"
+          echo "QuarkChain RPC Healthcheck: $overall" >> "$GITHUB_OUTPUT"
+          echo >> "$GITHUB_OUTPUT"
+          echo "Event: $EVENT_NAME" >> "$GITHUB_OUTPUT"
+          echo "Schedule: ${EVENT_SCHEDULE:-N/A}" >> "$GITHUB_OUTPUT"
+          echo "Run: $RUN_URL" >> "$GITHUB_OUTPUT"
+          echo >> "$GITHUB_OUTPUT"
+          if [[ "$overall" == "OK" ]]; then
+            echo "| network | rpc_url | result |" >> "$GITHUB_OUTPUT"
+            echo "|---|---|---|" >> "$GITHUB_OUTPUT"
+            printf "%b" "$table_rows_no_error" >> "$GITHUB_OUTPUT"
+          else
+            echo "| network | rpc_url | result | error |" >> "$GITHUB_OUTPUT"
+            echo "|---|---|---|---|" >> "$GITHUB_OUTPUT"
+            printf "%b" "$table_rows_with_error" >> "$GITHUB_OUTPUT"
+          fi
+          echo "EOF" >> "$GITHUB_OUTPUT"
+
+          echo "html_body<<EOF" >> "$GITHUB_OUTPUT"
+          echo "<p>QuarkChain RPC Healthcheck: <b>${overall}</b></p>" >> "$GITHUB_OUTPUT"
+          echo "<p>Event: ${EVENT_NAME}<br/>Schedule: ${EVENT_SCHEDULE:-N/A}<br/>Run: <a href=\"${RUN_URL}\">${RUN_URL}</a></p>" >> "$GITHUB_OUTPUT"
+          echo "<table border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse: collapse;\">" >> "$GITHUB_OUTPUT"
+          if [[ "$overall" == "OK" ]]; then
+            echo "<thead><tr><th>network</th><th>rpc_url</th><th>result</th></tr></thead>" >> "$GITHUB_OUTPUT"
+            echo "<tbody>${html_rows_no_error}</tbody>" >> "$GITHUB_OUTPUT"
+          else
+            echo "<thead><tr><th>network</th><th>rpc_url</th><th>result</th><th>error</th></tr></thead>" >> "$GITHUB_OUTPUT"
+            echo "<tbody>${html_rows_with_error}</tbody>" >> "$GITHUB_OUTPUT"
+          fi
+          echo "</table>" >> "$GITHUB_OUTPUT"
+          echo "EOF" >> "$GITHUB_OUTPUT"
+
+      - name: Send email
+        if: ${{ steps.compose.outputs.send == 'true' }}
+        uses: dawidd6/action-send-mail@v6
+        with:
+          server_address: smtp.gmail.com
+          server_port: 465
+          username: ${{ secrets.RPC_HEALTHCHECK_SMTP_USERNAME }}
+          password: ${{ secrets.RPC_HEALTHCHECK_SMTP_PASSWORD }}
+          from: QuarkChainRPC
+          to: ${{ secrets.RPC_HEALTHCHECK_EMAIL_TO }}
+          subject: ${{ steps.compose.outputs.subject }}
+          body: ${{ steps.compose.outputs.body }}
+          html_body: ${{ steps.compose.outputs.html_body }}