diff --git a/src/main/java/org/qortal/api/resource/RenderResource.java b/src/main/java/org/qortal/api/resource/RenderResource.java
index ae8bade9..5b2b1333 100644
--- a/src/main/java/org/qortal/api/resource/RenderResource.java
+++ b/src/main/java/org/qortal/api/resource/RenderResource.java
@@ -25,6 +25,7 @@ import org.qortal.api.Security;
 import org.qortal.arbitrary.misc.Service;
 import org.qortal.arbitrary.*;
 import org.qortal.arbitrary.exception.MissingDataException;
+import org.qortal.controller.arbitrary.ArbitraryDataRenderManager;
 import org.qortal.data.transaction.ArbitraryTransactionData.*;
 import org.qortal.repository.DataException;
 import org.qortal.settings.Settings;
@@ -94,11 +95,34 @@ public class RenderResource {
         return "Unable to generate preview URL";
     }
 
+    @POST
+    @Path("authorize/{service}/{resourceId}")
+    @SecurityRequirement(name = "apiKey")
+    public boolean authorizeResource(@PathParam("service") Service service,
+                                     @PathParam("resourceId") String resourceId) {
+        Security.checkApiCallAllowed(request);
+        ArbitraryDataResource resource = new ArbitraryDataResource(resourceId, null, service, null);
+        ArbitraryDataRenderManager.getInstance().addToAuthorizedResources(resource);
+        return true;
+    }
+
+    @POST
+    @Path("authorize/{service}/{resourceId}/{identifier}")
+    @SecurityRequirement(name = "apiKey")
+    public boolean authorizeResource(@PathParam("service") Service service,
+                                     @PathParam("resourceId") String resourceId,
+                                     @PathParam("identifier") String identifier) {
+        Security.checkApiCallAllowed(request);
+        ArbitraryDataResource resource = new ArbitraryDataResource(resourceId, null, service, identifier);
+        ArbitraryDataRenderManager.getInstance().addToAuthorizedResources(resource);
+        return true;
+    }
+
     @GET
     @Path("/signature/{signature}")
     @SecurityRequirement(name = "apiKey")
     public HttpServletResponse getIndexBySignature(@PathParam("signature") String signature) {
-        Security.checkApiCallAllowed(request);
+        requirePriorAuthorization(signature, Service.WEBSITE, null);
         return this.get(signature, ResourceIdType.SIGNATURE, null, "/", null, "/render/signature", true, true);
     }
 
@@ -106,7 +130,7 @@ public class RenderResource {
     @Path("/signature/{signature}/{path:.*}")
     @SecurityRequirement(name = "apiKey")
     public HttpServletResponse getPathBySignature(@PathParam("signature") String signature, @PathParam("path") String inPath) {
-        Security.checkApiCallAllowed(request);
+        requirePriorAuthorization(signature, Service.WEBSITE, null);
         return this.get(signature, ResourceIdType.SIGNATURE, null, inPath,null, "/render/signature", true, true);
     }
 
@@ -114,7 +138,7 @@ public class RenderResource {
     @Path("/hash/{hash}")
     @SecurityRequirement(name = "apiKey")
     public HttpServletResponse getIndexByHash(@PathParam("hash") String hash58, @QueryParam("secret") String secret58) {
-        Security.checkApiCallAllowed(request);
+        requirePriorAuthorization(hash58, Service.WEBSITE, null);
         return this.get(hash58, ResourceIdType.FILE_HASH, Service.WEBSITE, "/", secret58, "/render/hash", true, false);
     }
 
@@ -123,7 +147,7 @@ public class RenderResource {
     @SecurityRequirement(name = "apiKey")
     public HttpServletResponse getPathByHash(@PathParam("hash") String hash58, @PathParam("path") String inPath,
                                              @QueryParam("secret") String secret58) {
-        Security.checkApiCallAllowed(request);
+        requirePriorAuthorization(hash58, Service.WEBSITE, null);
         return this.get(hash58, ResourceIdType.FILE_HASH, Service.WEBSITE, inPath, secret58, "/render/hash", true, false);
     }
 
@@ -133,7 +157,7 @@ public class RenderResource {
     public HttpServletResponse getPathByName(@PathParam("service") Service service,
                                              @PathParam("name") String name,
                                              @PathParam("path") String inPath) {
-        Security.checkApiCallAllowed(request);
+        requirePriorAuthorization(name, service, null);
         String prefix = String.format("/render/%s", service);
         return this.get(name, ResourceIdType.NAME, service, inPath, null, prefix, true, true);
     }
@@ -143,7 +167,7 @@ public class RenderResource {
     @SecurityRequirement(name = "apiKey")
     public HttpServletResponse getIndexByName(@PathParam("service") Service service,
                                               @PathParam("name") String name) {
-        Security.checkApiCallAllowed(request);
+        requirePriorAuthorization(name, service, null);
         String prefix = String.format("/render/%s", service);
         return this.get(name, ResourceIdType.NAME, service, "/", null, prefix, true, true);
     }
@@ -176,4 +200,11 @@ public class RenderResource {
         return renderer.render();
     }
 
+    private void requirePriorAuthorization(String resourceId, Service service, String identifier) {
+        ArbitraryDataResource resource = new ArbitraryDataResource(resourceId, null, service, identifier);
+        if (!ArbitraryDataRenderManager.getInstance().isAuthorized(resource)) {
+            throw ApiExceptionFactory.INSTANCE.createCustomException(request, ApiError.UNAUTHORIZED, "Call /render/authorize first");
+        }
+    }
+
 }
diff --git a/src/main/java/org/qortal/arbitrary/ArbitraryDataResource.java b/src/main/java/org/qortal/arbitrary/ArbitraryDataResource.java
index 05fc4933..3974939a 100644
--- a/src/main/java/org/qortal/arbitrary/ArbitraryDataResource.java
+++ b/src/main/java/org/qortal/arbitrary/ArbitraryDataResource.java
@@ -113,7 +113,23 @@ public class ArbitraryDataResource {
         }
     }
 
+    private String resourceIdString() {
+        return resourceId != null ? resourceId : "";
+    }
+
+    private String resourceIdTypeString() {
+        return resourceIdType != null ? resourceIdType.toString() : "";
+    }
+
+    private String serviceString() {
+        return service != null ? service.toString() : "";
+    }
+
     private String identifierString() {
         return identifier != null ? identifier : "";
     }
+
+    public String toString() {
+        return String.format("%s-%s-%s-%s", resourceIdString(), resourceIdTypeString(), serviceString(), identifierString());
+    }
 }
diff --git a/src/main/java/org/qortal/controller/arbitrary/ArbitraryDataRenderManager.java b/src/main/java/org/qortal/controller/arbitrary/ArbitraryDataRenderManager.java
new file mode 100644
index 00000000..693cbf82
--- /dev/null
+++ b/src/main/java/org/qortal/controller/arbitrary/ArbitraryDataRenderManager.java
@@ -0,0 +1,50 @@
+package org.qortal.controller.arbitrary;
+
+import org.qortal.arbitrary.ArbitraryDataFile;
+import org.qortal.arbitrary.ArbitraryDataResource;
+import org.qortal.arbitrary.misc.Service;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+
+public class ArbitraryDataRenderManager {
+
+    private static ArbitraryDataRenderManager instance;
+
+    /**
+     * List to keep track of authorized resources for rendering.
+     */
+    private List<ArbitraryDataResource> authorizedResources = Collections.synchronizedList(new ArrayList<>());
+
+
+    public ArbitraryDataRenderManager() {
+
+    }
+
+    public static ArbitraryDataRenderManager getInstance() {
+        if (instance == null)
+            instance = new ArbitraryDataRenderManager();
+
+        return instance;
+    }
+
+    public boolean isAuthorized(ArbitraryDataResource resource) {
+        for (ArbitraryDataResource authorizedResource : this.authorizedResources) {
+            if (authorizedResource != null && resource != null) {
+                if (Objects.equals(authorizedResource.toString(), resource.toString())) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    public void addToAuthorizedResources(ArbitraryDataResource resource) {
+        if (!this.isAuthorized(resource)) {
+            this.authorizedResources.add(resource);
+        }
+    }
+
+}