diff --git a/src/crawlers.ts b/src/crawlers.ts
index 9515bd3..dd77495 100644
--- a/src/crawlers.ts
+++ b/src/crawlers.ts
@@ -20,7 +20,7 @@ import { ContentCrawlerTypes, GOOGLE_STANDARD_RESULTS_PER_PAGE } from './const.j
 import { deduplicateResults, scrapeOrganicResults } from './google-search/google-extractors-urls.js';
 import { getMiniActor } from './mini-actors.js';
 import { failedRequestHandler, requestHandlerCheerio, requestHandlerPlaywright } from './request-handler.js';
-import { addEmptyResultToResponse, sendResponseError } from './responses.js';
+import { addEmptyResultToResponse, sendResponseError, sendResponseIfFinished } from './responses.js';
 import type { ContentCrawlerOptions, ContentCrawlerUserData, SearchCrawlerUserData } from './types.js';
 import { addTimeMeasureEvent, createRequest, createSearchRequest, isActorStandby, randomId } from './utils.js';
 
@@ -107,7 +107,7 @@ export async function createAndStartSearchCrawler(
             const organicResults = scrapeOrganicResults($);
 
             // Destructure userData for easier access (pagination fields are initialized in createSearchRequest)
-            const { collectedResults, currentPage, totalPages, maxResults, userAuthorization } = request.userData;
+            const { collectedResults, currentPage, totalPages, maxResults, actorRequestId } = request.userData;
 
             // Merge with previously collected results and deduplicate
             const allResults = [...collectedResults, ...organicResults];
@@ -155,7 +155,7 @@ export async function createAndStartSearchCrawler(
                         responseId,
                         request.userData.contentScraperSettings!,
                         request.userData.timeMeasures!,
-                        userAuthorization,
+                        actorRequestId,
                     );
                     await addContentCrawlRequest(r, responseId, request.userData.contentCrawlerKey!);
                 }
@@ -232,10 +232,12 @@ async function createPlaywrightContentCrawler(
         requestHandler: (async (context) => {
             const typedContext = context as unknown as PlaywrightCrawlingContext<ContentCrawlerUserData>;
             await requestHandlerPlaywright(typedContext, blocker);
-            await maybeCharge(ContentCrawlerTypes.PLAYWRIGHT, typedContext.request.userData.userAuthorization);
+            await maybeCharge(ContentCrawlerTypes.PLAYWRIGHT, typedContext.request.userData.actorRequestId);
+            sendResponseIfFinished(typedContext.request.userData.responseId!);
         }),
         failedRequestHandler: async ({ request }, err) => {
             await failedRequestHandler(request, err, ContentCrawlerTypes.PLAYWRIGHT);
+            sendResponseIfFinished(request.userData.responseId!);
         },
     });
 }
@@ -253,10 +255,12 @@ async function createCheerioContentCrawler(
         requestHandler: (async (context) => {
             const typedContext = context as unknown as CheerioCrawlingContext<ContentCrawlerUserData>;
             await requestHandlerCheerio(typedContext);
-            await maybeCharge(ContentCrawlerTypes.CHEERIO, typedContext.request.userData.userAuthorization);
+            await maybeCharge(ContentCrawlerTypes.CHEERIO, typedContext.request.userData.actorRequestId);
+            sendResponseIfFinished(typedContext.request.userData.responseId!);
         }),
         failedRequestHandler: async ({ request }, err) => {
             await failedRequestHandler(request, err, ContentCrawlerTypes.CHEERIO);
+            sendResponseIfFinished(request.userData.responseId!);
         },
     });
 }
@@ -276,9 +280,9 @@ async function chargeNormal(eventName: string): Promise<void> {
 
 /**
  * Multi-tenant standby charging: POSTs directly to the platform charge REST endpoint,
- * passing the calling end-user's authorization so that user (not the Actor owner) is billed.
+ * passing the calling request's ID so that the correct caller (not the Actor owner) is billed.
  */
-async function chargeStandby(eventName: string, userAuthorization: string): Promise<void> {
+async function chargeStandby(eventName: string, actorRequestId: string): Promise<void> {
     const { apiBaseUrl, actorRunId, token } = Actor.getEnv();
     if (!apiBaseUrl || !actorRunId || !token) {
         log.warning(`Skipping standby charge for ${eventName} event: missing apiBaseUrl/actorRunId/token from Actor.getEnv().`);
@@ -292,7 +296,7 @@ async function chargeStandby(eventName: string, userAuthorization: string): Prom
             Authorization: `Bearer ${token}`,
             'Idempotency-Key': randomId(),
         },
-        body: JSON.stringify({ eventName, count: 1, userAuthorization }),
+        body: JSON.stringify({ eventName, count: 1, requestId: actorRequestId }),
     });
     if (!response.ok) {
         const resText = await response.text();
@@ -304,21 +308,29 @@ async function chargeStandby(eventName: string, userAuthorization: string): Prom
  * Dispatches to the correct charging path (normal single-run vs. multi-tenant standby)
  * based on isActorStandby().
  */
-async function maybeCharge(crawlerType: ContentCrawlerTypes, userAuthorization?: string) {
+const CHARGE_TIMEOUT_MILLIS = 5_000;
+
+async function maybeCharge(crawlerType: ContentCrawlerTypes, actorRequestId?: string) {
     if (getMiniActor().name !== 'url-to-markdown') {
         return;
     }
     const eventName = getEventName(crawlerType);
     try {
-        if (isActorStandby()) {
-            if (!userAuthorization) {
-                log.warning(`Skipping standby charge for ${eventName} event: missing userAuthorization (x-apify-user-authorization header was not provided).`);
-                return;
-            }
-            await chargeStandby(eventName, userAuthorization);
-        } else {
-            await chargeNormal(eventName);
-        }
+        const chargePromise = isActorStandby()
+            ? (async () => {
+                if (!actorRequestId) {
+                    log.warning(`Skipping standby charge for ${eventName} event: missing actorRequestId (x-actor-request-id header was not provided).`);
+                    return;
+                }
+                await chargeStandby(eventName, actorRequestId);
+            })()
+            : chargeNormal(eventName);
+
+        const timeoutPromise = new Promise<never>((_, reject) => {
+            setTimeout(() => reject(new Error(`Charging timed out after ${CHARGE_TIMEOUT_MILLIS} ms`)), CHARGE_TIMEOUT_MILLIS);
+        });
+
+        await Promise.race([chargePromise, timeoutPromise]);
     } catch (err) {
         log.error(`Failed to charge for ${eventName} event: ${err instanceof Error ? err.message : String(err)}`);
     }
diff --git a/src/mcp/server.ts b/src/mcp/server.ts
index 86ab28a..8404317 100644
--- a/src/mcp/server.ts
+++ b/src/mcp/server.ts
@@ -11,7 +11,7 @@ import type { Input } from '../types.js';
 export class McpServer {
     private server: Server;
     private toolName: string;
-    private userAuthorization?: string;
+    private actorRequestId?: string;
 
     constructor() {
         const miniActor = getMiniActor();
@@ -58,15 +58,15 @@ export class McpServer {
         this.server.setRequestHandler(CallToolRequestSchema, async (request) => {
             const { name, arguments: args } = request.params;
             if (name === this.toolName) {
-                const content = await handleModelContextProtocol(args as unknown as Input, this.userAuthorization);
+                const content = await handleModelContextProtocol(args as unknown as Input, this.actorRequestId);
                 return { content: content.map((message) => ({ type: 'text', text: JSON.stringify(message) })) };
             }
             throw new Error(`Unknown tool: ${name}`);
         });
     }
 
-    async connect(transport: Transport, userAuthorization?: string): Promise<void> {
-        this.userAuthorization = userAuthorization;
+    async connect(transport: Transport, actorRequestId?: string): Promise<void> {
+        this.actorRequestId = actorRequestId;
         await this.server.connect(transport);
     }
 }
diff --git a/src/request-handler.ts b/src/request-handler.ts
index cf42198..1a36b60 100644
--- a/src/request-handler.ts
+++ b/src/request-handler.ts
@@ -7,7 +7,7 @@ import { type CheerioCrawlingContext, htmlToText, log, type PlaywrightCrawlingCo
 
 import { ContentCrawlerStatus, ContentCrawlerTypes } from './const.js';
 import { blockMediaRequests, SKIPPED_MEDIA_FILE_MESSAGE } from './media.js';
-import { addResultToResponse, responseData, sendResponseIfFinished } from './responses.js';
+import { addResultToResponse, responseData } from './responses.js';
 import type { ContentCrawlerUserData, Output } from './types.js';
 import { addTimeMeasureEvent, isActorStandby, transformTimeMeasuresToRelative } from './utils.js';
 import {
@@ -153,7 +153,6 @@ async function pushSkippedResult(
     await context.pushData(resultSkipped);
     if (responseId) {
         addResultToResponse(responseId, request.uniqueKey, resultSkipped);
-        sendResponseIfFinished(responseId);
     }
 }
 
@@ -230,7 +229,6 @@ async function handleContent(
     // Get responseId from the request.userData, which corresponds to the original search request
     if (responseId) {
         addResultToResponse(responseId, request.uniqueKey, result);
-        sendResponseIfFinished(responseId);
     }
 }
 
@@ -348,6 +346,5 @@ export async function failedRequestHandler(request: Request, err: Error, crawler
         log.info(`Adding result to the Apify dataset, url: ${request.url}`);
         await Actor.pushData(resultErr);
         addResultToResponse(responseId, request.uniqueKey, resultErr);
-        sendResponseIfFinished(responseId);
     }
 }
diff --git a/src/search.ts b/src/search.ts
index 620c460..3236626 100644
--- a/src/search.ts
+++ b/src/search.ts
@@ -13,7 +13,7 @@ import {
     addTimeMeasureEvent,
     createRequest,
     createSearchRequest,
-    extractUserAuthorization,
+    extractActorRequestId,
     interpretAsUrl,
     parseParameters,
     randomId,
@@ -29,7 +29,7 @@ function prepareRequest(
     searchCrawlerOptions: CheerioCrawlerOptions,
     contentCrawlerKey: string,
     contentScraperSettings: ContentScraperSettings,
-    userAuthorization?: string,
+    actorRequestId?: string,
 ) {
     if (!getMiniActor().runsSearch) {
         const { url } = (input as Input & UrlToMarkdownInput);
@@ -48,7 +48,7 @@ function prepareRequest(
             responseId,
             contentScraperSettings,
             null,
-            userAuthorization,
+            actorRequestId,
         );
         addTimeMeasureEvent(req.userData!, 'request-received', Date.now());
         return { req, isUrl: true, responseId };
@@ -69,7 +69,7 @@ function prepareRequest(
             responseId,
             contentScraperSettings,
             null,
-            userAuthorization,
+            actorRequestId,
         )
         : createSearchRequest(
             {
@@ -78,7 +78,7 @@ function prepareRequest(
                 maxResults,
                 contentCrawlerKey,
                 contentScraperSettings,
-                userAuthorization,
+                actorRequestId,
             },
             searchCrawlerOptions.proxyConfiguration,
         );
@@ -91,7 +91,7 @@ function prepareRequest(
  * Internal function that handles the common logic for search.
  * Returns a promise that resolves to the final results array of Output objects.
  */
-async function runSearchProcess(params: Partial<Input>, userAuthorization?: string): Promise<Output[]> {
+async function runSearchProcess(params: Partial<Input>, actorRequestId?: string): Promise<Output[]> {
     // Process the query parameters the same way as normal inputs
     const {
         input,
@@ -111,7 +111,7 @@ async function runSearchProcess(params: Partial<Input>, userAuthorization?: stri
         searchCrawlerOptions,
         contentCrawlerKey,
         contentScraperSettings,
-        userAuthorization,
+        actorRequestId,
     );
 
     // Create a promise that resolves when all requests are processed
@@ -143,9 +143,9 @@ export async function handleSearchRequest(request: IncomingMessage, response: Se
         const params = parseParameters(request.url?.slice(getMiniActor().route.length) ?? '');
         log.info(`Received query parameters: ${JSON.stringify(params)}`);
 
-        const userAuthorization = extractUserAuthorization(request.headers);
+        const actorRequestId = extractActorRequestId(request.headers);
 
-        const results = await runSearchProcess(params, userAuthorization);
+        const results = await runSearchProcess(params, actorRequestId);
 
         response.writeHead(200, { 'Content-Type': 'application/json' });
         response.end(JSON.stringify(results));
@@ -162,10 +162,10 @@ export async function handleSearchRequest(request: IncomingMessage, response: Se
  * Handles the model context protocol scenario (non-HTTP scenario).
  * Uses the same runSearchProcess function but just returns the results as a promise.
  */
-export async function handleModelContextProtocol(params: Partial<Input>, userAuthorization?: string): Promise<Output[]> {
+export async function handleModelContextProtocol(params: Partial<Input>, actorRequestId?: string): Promise<Output[]> {
     try {
         log.info(`Received parameters: ${JSON.stringify(params)}`);
-        return await runSearchProcess(params, userAuthorization);
+        return await runSearchProcess(params, actorRequestId);
     } catch (e) {
         const error = e as Error;
         log.error(`UserInputError occurred: ${error.message}`);
diff --git a/src/server.ts b/src/server.ts
index d866740..e014a12 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -6,7 +6,7 @@ import { Routes } from './const.js';
 import { McpServer } from './mcp/server.js';
 import { getMiniActor } from './mini-actors.js';
 import { handleSearchRequest } from './search.js';
-import { extractUserAuthorization } from './utils.js';
+import { extractActorRequestId } from './utils.js';
 
 export function createServer(): express.Express {
     const app = express();
@@ -36,8 +36,8 @@ export function createServer(): express.Express {
     app.get(Routes.SSE, async (req: Request, res: Response) => {
         log.info(`Received GET message at: ${req.url}`);
         transport = new SSEServerTransport(Routes.MESSAGE, res);
-        const userAuthorization = extractUserAuthorization(req.headers);
-        await mcpServer.connect(transport, userAuthorization);
+        const actorRequestId = extractActorRequestId(req.headers);
+        await mcpServer.connect(transport, actorRequestId);
     });
 
     app.post(Routes.MESSAGE, async (req: Request, res: Response) => {
diff --git a/src/types.ts b/src/types.ts
index d50e63f..dd6b408 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -111,7 +111,7 @@ export type SearchCrawlerUserData = {
     currentPage: number;
     /** Max pages: ceil(maxResults/10) + 1 to handle pages with <10 results */
     totalPages: number;
-    userAuthorization?: string;
+    actorRequestId?: string;
 };
 
 /**
@@ -127,7 +127,7 @@ export type ContentCrawlerUserData = {
     searchResult?: OrganicResult;
     contentCrawlerKey?: string;
     contentScraperSettings: ContentScraperSettings;
-    userAuthorization?: string;
+    actorRequestId?: string;
 };
 
 export type Output = {
diff --git a/src/utils.ts b/src/utils.ts
index 77f7107..63eb813 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -64,11 +64,11 @@ export async function abortRun(statusMessage: string): Promise<never> {
 }
 
 /**
- * Extracts the calling end-user's authorization from the x-apify-user-authorization header.
+ * Extracts the actor request ID from the x-actor-request-id header.
  * Node lower-cases header names, and the header could theoretically arrive as a string array.
  */
-export function extractUserAuthorization(headers: IncomingHttpHeaders): string | undefined {
-    const header = headers['x-apify-user-authorization'];
+export function extractActorRequestId(headers: IncomingHttpHeaders): string | undefined {
+    const header = headers['x-actor-request-id'];
     return Array.isArray(header) ? header[0] : header;
 }
 
@@ -172,7 +172,7 @@ export function createSearchRequest(
             collectedResults,
             currentPage,
             totalPages,
-            userAuthorization: userData.userAuthorization,
+            actorRequestId: userData.actorRequestId,
         },
     };
 }
@@ -186,7 +186,7 @@ export function createRequest(
     responseId: string,
     contentScraperSettings: ContentScraperSettings,
     timeMeasures: TimeMeasure[] | null = null,
-    userAuthorization?: string,
+    actorRequestId?: string,
 ): RequestOptions<ContentCrawlerUserData> {
     return {
         url: result.url!,
@@ -199,7 +199,7 @@ export function createRequest(
             searchResult: result.url && result.title ? result : undefined,
             timeMeasures: timeMeasures ? [...timeMeasures] : [],
             contentScraperSettings,
-            userAuthorization,
+            actorRequestId,
         },
     };
 }