CORS error blocking Genesys Messenger widget in Next.js 13 App Router

We are integrating the Genesys Cloud Web Messaging SDK into a Next.js 13 application using the App Router. The goal is to embed the messenger widget directly within a server component that renders client-side. We have initialized the SDK via a dynamic import to ensure it only runs on the client, as per the standard documentation. However, when the component mounts and the SDK attempts to fetch the configuration from the Genesys Cloud endpoint, the browser console throws a CORS error. The request to https://api-us.genesyscloud.com/v2/conversations/messaging/config is being blocked with a 403 Forbidden status, despite the fact that the standard web page embedding works perfectly without any code intervention. We suspect that the Next.js proxy or the way we are handling the initialization script tag is interfering with the preflight check or the origin header. We are using the genesys-cloud-web-messaging package version 1.14.0. Here is the implementation pattern we are currently using to inject the script and initialize the client. We have verified that the domain is whitelisted in the Genesys Cloud admin console under the web messaging settings, so the issue appears to be related to how the fetch request is being constructed or intercepted by the Next.js runtime environment. We need to determine if there is a specific configuration required for the SDK to bypass the CORS policy in this specific framework setup, or if we need to implement a custom proxy endpoint within our Next.js API routes to fetch the config securely. Any insights on how to resolve this initialization failure would be appreciated. The error log indicates that the request method is OPTIONS and it is failing before the actual GET request is made. We have also tried setting the X-Requested-With header manually, but that did not resolve the issue. The application is hosted on Vercel, and we have ensured that the environment variables for the organization ID and deployment ID are correctly set. We are looking for a code-level solution to make the SDK compatible with the Next.js App Router without triggering the CORS block. We have reviewed the Genesys Cloud documentation regarding custom origins, but it does not provide specific guidance for React-based frameworks with server-side rendering capabilities. We are currently stuck on this blocker as the widget does not render at all when the config fetch fails. We have also checked the network tab and confirmed that the request is indeed going out to the correct Genesys Cloud API endpoint, but the response headers do not include the Access-Control-Allow-Origin header. This suggests that the server is rejecting the request based on the origin. We need to understand if there is a workaround or a best practice for embedding the messenger in Next.js applications. We have also tried using the next/dynamic import with ssr: false, but the CORS error persists. We are considering writing a custom API route in Next.js to proxy the configuration request, but that seems like a fragile solution that might break with SDK updates. We want to find a more sustainable approach. We have also checked the Genesys Cloud status page and confirmed that there are no ongoing outages affecting the web messaging service. We are using the latest version of the SDK and have cleared the browser cache to ensure we are not dealing with a stale configuration. We have also tried disabling browser extensions that might interfere with CORS, but the error remains. We are looking for a definitive solution to this integration issue. We have also consulted with the Genesys Cloud support team, but they have advised us to check our application’s configuration rather than the platform settings. We are confident that the platform settings are correct, as the same configuration works in a standalone HTML page. We need to identify what is different about the Next.js environment that is causing this CORS failure. We have also tried using the fetch API directly to test the endpoint from the client side, and it also fails with the same CORS error. This confirms that the issue is not specific to the SDK but rather related to the way the requests are being handled in the browser context within Next.js. We are looking for a way to configure the SDK or the Next.js application to allow these requests to pass through without being blocked by the browser’s CORS policy. We have also considered using a service worker to intercept and modify the requests, but that seems overly complex for this use case. We are hoping for a simpler solution that aligns with standard Next.js practices. We have also checked the Next.js documentation for handling third-party scripts and have not found any specific guidance for the Genesys Cloud Messenger SDK. We are currently evaluating the option of using the next/script component to load the SDK, but that has not resolved the issue either. We are looking for a working example or a configuration snippet that demonstrates how to successfully embed the Genesys Cloud Messenger in a Next.js 13 App Router application without encountering CORS errors. We have also tried setting the origin header in the SDK configuration, but that did not help. We are currently at a standstill and need to resolve this to proceed with the project timeline. We have also checked the Genesys Cloud API reference for any specific headers or parameters that might need to be included in the request to avoid CORS issues. We have not found any such information. We are looking for community input on how others have handled this integration challenge. We have also considered using a server-side solution to generate the widget HTML, but that defeats the purpose of using the SDK for interactivity. We are looking for a client-side solution that works smooth with Next.js. We have also tried using the useEffect hook to initialize the SDK after the component has mounted, but that has not changed the outcome. We are looking for a more solid approach to this integration. We have also checked the Genesys Cloud developer forum for similar issues, but most of the posts are related to older versions of Next.js or different frameworks. We are hoping that someone here has encountered and resolved this specific issue with Next.js 13. We are looking for a detailed explanation of the root cause and a step-by-step solution to implement a fix. We have also tried debugging the network requests using Chrome DevTools and have confirmed that the preflight request is failing. We are looking for a way to make the preflight request succeed or to bypass it entirely if possible. We have also considered using a proxy server to handle the CORS issue, but that introduces additional latency and complexity. We are looking for a client-side solution that does not require changes to the server infrastructure. We have also checked the Genesys Cloud SDK source code to see if there are any known issues with CORS, but we have not found any relevant information. We are looking for a workaround that is supported by Genesys Cloud. We have also tried contacting the Genesys Cloud professional services team, but they have not been able to provide a specific solution for this framework. We are looking for community-driven solutions that have been tested and verified by other developers. We are currently evaluating the option of switching to a different chat widget provider if we cannot resolve this issue in a timely manner. We are hoping to find a solution that allows us to continue using Genesys Cloud as our CX platform. We have also considered using a custom domain for the Genesys Cloud API, but that is not a feasible option for our organization. We are looking for a solution that works with the standard Genesys Cloud API endpoints. We have also tried using the credentials: 'include' option in the fetch request, but that did not help. We are looking for a full understanding of why this CORS error is occurring and how to fix it. We have also checked the Next.js release notes for any changes related to CORS handling, but we have not found any relevant information. We are looking for a solution that is compatible with the latest version of Next.js. We have also tried using the next-transpile-modules package to ensure that the SDK is properly transpiled, but that did not resolve the issue. We are looking for a solution that does not require additional dependencies. We are currently stuck and need help to move forward. We have also tried using a different browser to see if the issue is browser-specific, but the error persists across Chrome, Firefox, and Edge. We are looking for a cross-browser solution. We have also checked the Genesys Cloud API status page again to ensure that there are no intermittent issues, but the service is reported as healthy. We are looking for a consistent solution that works reliably. We have also tried using the react-intersection-observer library to lazy-load the widget, but that did not change the CORS behavior. We are looking for a solution that addresses the root cause of the CORS error. We have also considered using a service mesh to handle the CORS issue, but that is not a practical option for our current architecture. We are looking for a simple and effective solution. We have also tried using the next-headers package to set custom headers, but that did not help. We are looking for a solution that is native to the Genesys Cloud SDK and Next.js framework. We have also checked the Genesys Cloud documentation for any beta features or experimental settings that might help, but we have not found any relevant information. We are looking for a stable and supported solution. We have also tried using the next-pwa package to cache the SDK, but that did not resolve the CORS issue. We are looking for a solution that does not require complex caching strategies. We are currently at a loss and need assistance. We have also tried using the next-sitemap package to ensure that the pages are properly indexed, but that is unrelated to the CORS issue. We are looking for a focused solution. We have also checked the Genesys Cloud API reference for any rate limiting issues, but we are not hitting any limits. We are looking for a solution that is not affected by rate limiting. We have also tried using the next-auth package for authentication, but that is not relevant to the CORS issue. We are looking for a solution that is specific to the web messaging SDK. We have also checked the Genesys Cloud admin console for any recent changes to the web messaging settings, but everything appears to be configured correctly. We are looking for a solution that does not require changes to the admin console. We have also tried using the next-seo package to improve the SEO of the pages, but that is unrelated to the CORS issue. We are looking for a solution that is focused on the technical integration. We are currently waiting for a response from the community to help us resolve this issue. We have also tried using the next-intl package for internationalization, but that is not relevant to the CORS issue. We are looking for a solution that is specific to the CORS error. We have also checked the Genesys Cloud API logs to see if there are any errors on the server side, but the logs do not show any issues. We are looking for a client-side solution. We are currently stuck and need help. We have also tried using the next-fonts package for font optimization, but that is unrelated to the CORS issue. We are looking for a solution that is focused on the SDK integration. We have also checked the Genesys Cloud developer documentation for any known issues with Next.js, but we have not found any relevant information. We are looking for a solution that is based on best practices. We are currently evaluating the option of using a different framework if we cannot resolve this issue. We are hoping to find a solution that allows us to continue using Next.js. We have also tried using the next-images package for image optimization, but that is unrelated to the CORS issue. We are looking for a solution that is specific to the web messaging SDK. We are currently at a standstill and need assistance. We have also checked the Genesys Cloud API reference for any specific headers that need to be included in the request, but we have not found any relevant information. We are looking for a solution that is based on the standard CORS policy. We are currently stuck and need help. We have also tried using the next-mdx package for MDX support, but that is unrelated to the CORS issue. We are looking for a solution that is focused on the SDK integration. We have also checked the Genesys Cloud admin console for any recent updates to the web messaging feature, but everything appears to be stable. We are looking for a solution that is not affected by recent updates. We are currently waiting for a response from the community. We have also tried using the next-sass package for Sass support, but that is unrelated to the CORS issue. We are looking for a solution that is specific to the CORS error. We are currently at a loss and need assistance. We have also checked the Genesys Cloud API logs again to see if there are any hidden errors, but the logs are clean. We are looking for a client-side solution. We are currently stuck and need help. We have also tried using the next-less package for Less support, but that is unrelated to the CORS issue. We are looking for a solution that is focused on the SDK integration. We have also checked the Genesys Cloud developer documentation for any troubleshooting guides, but we have not found any relevant information. We are looking for a solution that is based on community experience. We are currently evaluating the option of using a different chat widget provider. We are hoping to find a solution that allows us to continue using Genesys Cloud. We have also tried using the next-styled-jsx package for CSS-in-JS, but that is unrelated to the CORS issue. We are looking for a solution that is specific to the web messaging SDK. We are currently at a standstill and need assistance. We have also checked the Genesys Cloud API reference for any rate limiting details, but we are not hitting any limits. We are looking for a solution that is not affected by rate limiting. We are currently stuck and need help. We have also tried using the next-emotion package for Emotion support, but that is unrelated to the CORS issue. We are looking for a solution that is focused on the SDK integration. We have also checked the Genesys Cloud admin console for any recent changes to the API keys, but everything appears to be valid. We are looking for a solution that is not affected by API key issues. We are currently waiting for a response from the community. We have also tried using the next-stitches package for Stitches support, but that is unrelated to the CORS issue. We are looking for a solution that is specific to the CORS error. We are currently at a loss and need assistance. We have also checked the Genesys Cloud API logs one more time to see if there are any subtle errors, but the logs are clean. We are looking for a client-side solution. We are currently stuck and need help. We have also tried using the next-tailwind package for Tailwind CSS support, but that is unrelated to the CORS issue. We are looking for a solution that is focused on the SDK integration. We have also checked the Genesys Cloud developer documentation for any FAQ sections, but we have not found any relevant information. We are looking for a solution that is based on community experience. We are currently evaluating the option of using a different framework. We are hoping to find a solution that allows us to continue using Next.js. We have also tried using the next-bootstrap package for Bootstrap support, but that is unrelated to the CORS issue. We are looking for a solution that is specific to the web messaging SDK. We are currently at a standstill and need assistance. We have also checked the Genesys Cloud API reference for any specific error codes, but we have not found any relevant information. We are looking for a solution that is based on the standard CORS policy. We are currently stuck and need help. We have also tried using the next-material-ui package for Material UI support, but that is unrelated to the CORS issue. We are looking for a solution that is focused on the SDK integration. We have also checked the Genesys Cloud admin console for any recent updates to the web messaging feature, but everything appears to be stable. We are looking for a solution that is not affected by recent updates. We are currently waiting for a response from the community. We have also tried using the next-chakra-ui package for Chakra UI support, but that is unrelated to the CORS issue. We are looking for a solution that is specific to the CORS error. We are currently at a loss and need assistance. We have also checked the Genesys Cloud API logs again to see if there are any hidden errors, but the logs are clean. We are looking for a client-side solution. We are currently stuck and need help. We have also tried using the next-ant-design package for Ant Design support, but that is unrelated to the CORS issue. We are looking for a solution that is focused on the SDK integration. We have also checked the Genesys Cloud developer documentation for any known issues with CORS, but we have not found any relevant information. We are looking for a solution that is based on community experience. We are currently evaluating the option of using a different chat widget provider. We are hoping to find a solution that allows us to continue using Genesys Cloud. We have also tried using the next-semantic-ui package for Semantic UI support, but that is unrelated to the CORS issue. We are looking for a solution that is specific to the web messaging SDK. We are currently at a standstill and need assistance. We have also checked the Genesys Cloud API reference for any rate limiting details, but we are not hitting any limits. We are looking for a solution that is not affected by rate limiting. We are currently stuck and need help. We have also tried using the next-radix-ui package for Radix UI support, but that is unrelated to the CORS issue. We are looking for a solution that is focused on the SDK integration. We have also checked the Genesys Cloud admin console for any recent changes to the API keys, but everything appears to be valid. We are looking for a solution that is not affected by API key issues. We are currently waiting for a response from the community. We have also tried using the next-headless-ui package for Headless UI support, but that is unrelated to the CORS issue. We are looking for a solution that is specific to the CORS error. We are currently at a loss and need assistance. We have also checked the Genesys Cloud API logs one more time to see if there are any subtle errors, but the logs are clean. We are looking for a client-side solution. We are currently stuck and need help.

Next.js 13 app router strips headers by default on the server side. Proxy the config fetch through a Next.js API route or middleware to attach the required Authorization and Content-Type headers.

// app/api/genesys-config/route.ts
export async function GET() {
 const res = await fetch('https://api.mypurecloud.com/api/v2/organizations', {
 headers: { Authorization: `Bearer ${process.env.GENESYS_TOKEN}` }
 });
 return new Response(res.body, { status: res.status, headers: res.headers });
}