Fix/banner

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:25-alpine3.23@sha256:b9b5737eabd423ba73b21fe2e82332c0656d571daf1ebf19b0f89d0dd0d3ca93
+FROM node:25-alpine3.23@sha256:636c5bc8fa6a7a542bc99f25367777b0b3dd0db7d1ca3959d14137a1ac80bde2
 RUN apk add --no-cache bash>5.0.16-r0 git>2.26.0-r0 curl
 COPY entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh

README.md

@@ -1,3 +1,5 @@
+[![StepSecurity Maintained Action](https://raw.githubusercontent.com/step-security/maintained-actions-assets/main/assets/maintained-action-banner.png)](https://docs.stepsecurity.io/actions/stepsecurity-maintained-actions)
+
 ### GitHub Action - Markdown link check 🔗✔️
 
 This GitHub action checks all Markdown files in your repository for broken links.

entrypoint.sh

@@ -3,22 +3,43 @@
 set -eu
 
 # validate subscription status
-API_URL="https://agent.api.stepsecurity.io/v1/github/$GITHUB_REPOSITORY/actions/subscription"
-
-# Set a timeout for the curl command (3 seconds)
-RESPONSE=$(curl --max-time 3 -s -w "%{http_code}" "$API_URL" -o /dev/null) || true
-CURL_EXIT_CODE=$?
-
-# Decide based on curl exit code and HTTP status
-if [ $CURL_EXIT_CODE -ne 0 ]; then
-  echo "Timeout or API not reachable. Continuing to next step."
-elif [ "$RESPONSE" = "200" ]; then
-  :
-elif [ "$RESPONSE" = "403" ]; then
-  echo "Subscription is not valid. Reach out to support@stepsecurity.io"
-  exit 1
-else
-  echo "Timeout or API not reachable. Continuing to next step."
+UPSTREAM="gaurav-nelson/github-action-markdown-link-check"
+ACTION_REPO="${GITHUB_ACTION_REPOSITORY:-}"
+DOCS_URL="https://docs.stepsecurity.io/actions/stepsecurity-maintained-actions"
+
+echo ""
+echo -e "\033[1;36mStepSecurity Maintained Action\033[0m"
+echo "Secure drop-in replacement for $UPSTREAM"
+if [ "$REPO_PRIVATE" = "false" ]; then
+  echo -e "\033[32m✓ Free for public repositories\033[0m"
+fi
+echo -e "\033[36mLearn more:\033[0m $DOCS_URL"
+echo ""
+
+if [ "$REPO_PRIVATE" != "false" ]; then
+  SERVER_URL="${GITHUB_SERVER_URL:-https://github.com}"
+
+  if [ "$SERVER_URL" != "https://github.com" ]; then
+    BODY=$(printf '{"action":"%s","ghes_server":"%s"}' "$ACTION_REPO" "$SERVER_URL")
+  else
+    BODY=$(printf '{"action":"%s"}' "$ACTION_REPO")
+  fi
+
+  API_URL="https://agent.api.stepsecurity.io/v1/github/$GITHUB_REPOSITORY/actions/maintained-actions-subscription"
+
+  RESPONSE=$(curl --max-time 3 -s -w "%{http_code}" \
+    -X POST \
+    -H "Content-Type: application/json" \
+    -d "$BODY" \
+    "$API_URL" -o /dev/null) && CURL_EXIT_CODE=0 || CURL_EXIT_CODE=$?
+
+  if [ $CURL_EXIT_CODE -ne 0 ]; then
+    echo "Timeout or API not reachable. Continuing to next step."
+  elif [ "$RESPONSE" = "403" ]; then
+    echo -e "::error::\033[1;31mThis action requires a StepSecurity subscription for private repositories.\033[0m"
+    echo -e "::error::\033[31mLearn how to enable a subscription: $DOCS_URL\033[0m"
+    exit 1
+  fi
 fi
 
 NC='\033[0m' # No Color