A Record vs CNAME in Manus: Which DNS Record Do You Actually Need?
If you have ever tried to connect a custom domain to your Manus project and found yourself staring at a DNS settings panel wondering whether to choose an A Record or a CNAME, you are not alone. This is one of the most common points of confusion for people setting up projects on the Manus platform, and making the wrong choice can leave your domain pointing nowhere for hours.
This guide is going to cut through the confusion completely. By the time you finish reading, you will know exactly what each record type does, which one Manus requires for your specific situation, how to configure it correctly in your domain registrar, and how to avoid the most common mistakes that cause domains to fail silently after setup.
Whether you are building a client-facing application, launching a personal project, or deploying a business tool on Manus, getting your DNS right is the first step. Let us get into it.
What Is a DNS Record and Why Does It Matter in Manus?
DNS stands for Domain Name System. It is the system that translates human-readable domain names like yourbusiness.com into IP addresses that servers can understand. Without DNS records, no one can reach your Manus project through a custom domain.
When you deploy a project on Manus and want it accessible through your own domain rather than the default Manus subdomain, you need to add a DNS record at your domain registrar or DNS provider. This record tells the internet where to send traffic when someone types your domain into a browser.
Manus supports two primary DNS record types for custom domain connections: the A Record and the CNAME record. Each works differently, has different use cases, and carries different implications for how your domain resolves.
Getting this right is not optional. A misconfigured DNS record means your project will not load, your clients will see error pages, and you will spend time troubleshooting instead of building.
What Is an A Record?
An A Record, short for Address Record, is the most fundamental type of DNS record. It maps a domain name directly to an IPv4 address. When you create an A Record, you are essentially saying: “When someone visits this domain, send them to this specific IP address.”
An A Record looks like this in your DNS settings:
Type: A Host: @ (or your domain) Value: 192.0.2.1 (an IP address) TTL: 3600
The @ symbol typically represents your root domain, meaning the record applies to yourdomain.com without any prefix. Some registrars use the actual domain name instead of @.
A Records are extremely reliable and have been the backbone of internet routing for decades. They give you direct, unambiguous control over where your domain points. However, they do have one significant limitation: if the destination IP address ever changes, you have to manually update the A Record. In cloud platforms like Manus, IP addresses can change when infrastructure is updated or when load balancing configurations are adjusted.
What Is a CNAME Record?
A CNAME record, short for Canonical Name record, works differently. Instead of mapping your domain to an IP address, it maps your domain to another domain name. The DNS resolution then follows that alias to find the final IP address.
A CNAME record looks like this:
Type: CNAME Host: www (or a subdomain) Value: yourproject.manus.app (or the Manus-provided target) TTL: 3600
The key thing to understand about CNAME records is that they cannot be used for root domains on most DNS providers. You cannot set a CNAME record for yourdomain.com itself, only for subdomains like www.yourdomain.com or app.yourdomain.com. This is a limitation defined in the DNS standard itself, not something Manus controls.
The advantage of a CNAME is flexibility. Because it points to a hostname rather than a hard-coded IP address, if Manus updates the IP addresses behind their service, your domain automatically follows without requiring any change on your end. The CNAME chases the destination domain wherever it goes.
A Record vs CNAME in Manus: The Core Difference
Here is the practical difference when working inside Manus specifically.
Manus provides you with configuration instructions when you add a custom domain to your project. These instructions will typically specify either an IP address or a target hostname. Which one they provide determines which record type you should use.
If Manus gives you an IP address, you need an A Record. If Manus gives you a target hostname ending in something like manus.app or a similar platform domain, you need a CNAME.
This is not a stylistic choice. It is a technical requirement based on what information Manus provides and how their infrastructure is designed to accept incoming traffic from custom domains.
The distinction matters even more when you understand what happens under the hood. Manus, like most modern deployment platforms, often sits behind a content delivery network or a load balancer. These systems can distribute your traffic across multiple servers and IP addresses depending on factors like geographic location and server load. A CNAME pointing to a Manus hostname can take advantage of this routing intelligence automatically. A hard-coded A Record pointing to a single IP cannot.
When to Use an A Record in Manus
You should use an A Record in Manus when:
Manus instructs you to use a specific IP address during the custom domain setup process. This happens in some configurations where the platform routes traffic through a fixed entry point.
You are configuring your root domain, also called the apex domain or naked domain, and your DNS provider does not support CNAME flattening or ALIAS records. Root domains cannot use standard CNAME records per DNS specifications. In this case, an A Record pointing to Manus-provided IP addresses is the correct solution.
You are working with a DNS provider that has limited record type support and does not offer CNAME flattening capabilities.
To configure an A Record for Manus, log in to your domain registrar or DNS management panel. Navigate to the DNS settings for your domain. Add a new record with the type set to A. Set the host to @ if you are pointing the root domain, or enter the specific subdomain prefix if applicable. Enter the IP address provided by Manus in the value field. Set a reasonable TTL, with 3600 being a standard starting point. Save the record and allow time for propagation.
DNS propagation can take anywhere from a few minutes to 48 hours depending on your registrar and the existing TTL values on your domain. In practice, most changes propagate within one to two hours.
When to Use a CNAME Record in Manus
You should use a CNAME record in Manus when:
Manus provides a target hostname rather than an IP address during setup. This is increasingly common on modern cloud platforms because it allows the platform to manage its own infrastructure without breaking your domain configuration.
You are configuring a subdomain such as www.yourdomain.com, app.yourdomain.com, or any other prefix. Subdomains are where CNAME records work without restriction.
You want to benefit from automatic routing updates. When Manus modifies its infrastructure, your CNAME-based domain follows the change without any action on your part.
You are running multiple environments, such as staging.yourdomain.com and app.yourdomain.com, and want each to point to different Manus projects using clean, maintainable DNS configurations.
To configure a CNAME record for Manus, log in to your DNS provider. Navigate to DNS management for your domain. Create a new record with the type set to CNAME. Set the host to the subdomain you want to configure, such as www or app. In the value field, enter the exact target hostname that Manus provided during the custom domain setup, with no modifications. Set your TTL and save.
One important note: do not add a trailing period to the CNAME target unless your DNS provider explicitly requires it. Some providers add this automatically, while others need it specified. Check your registrar’s documentation if you are unsure.
The Root Domain Problem: How to Handle yourdomain.com in Manus
One of the most common problems people encounter when connecting a custom domain to Manus is the root domain issue. You want visitors who type yourdomain.com, without any www prefix, to reach your Manus project. The natural instinct is to create a CNAME pointing the root domain at the Manus target hostname. This will not work with standard DNS.
The DNS specification prohibits CNAME records at the zone apex, meaning the root of your domain. The reason is technical: a CNAME record claims to alias the entire domain name, but the root domain must also have SOA and NS records, which would conflict.
You have several practical options to solve this.
The first option is to use an A Record for the root domain with the IP addresses provided by Manus, and then use a CNAME for the www subdomain pointing to the Manus target. Add a redirect from the root to www, or from www to root, based on your preference for canonical URL structure.
The second option is to use a DNS provider that supports CNAME flattening or ALIAS records. Providers like Cloudflare, DNSimple, Route 53, and others offer a record type, sometimes called ALIAS or ANAME, that behaves like a CNAME but is valid at the root domain. Under the hood, the provider resolves the target hostname and serves the resulting IP addresses as if they were an A Record, giving you the flexibility of a CNAME without the technical violation.
If you are connecting a domain to Manus and want both yourdomain.com and www.yourdomain.com to work, the Cloudflare approach is highly recommended. Move your nameservers to Cloudflare, then create a CNAME record for your root domain pointing to the Manus hostname. Cloudflare automatically flattens this into the appropriate A records.
Step-by-Step: Configuring Your Domain in Manus
Here is a practical walkthrough of the complete domain connection process in Manus.
Start by opening your Manus project dashboard and navigating to the domain or settings section where custom domains are managed. Enter the domain or subdomain you want to connect. Manus will display either an IP address or a target hostname. Take note of exactly which type of value is shown.
Go to your domain registrar or DNS management interface. If you use Cloudflare, Namecheap, GoDaddy, Google Domains, or any other provider, the interface will differ in appearance but the underlying record types are the same.
If Manus gave you an IP address, create an A Record. Set the host to @ for root or the subdomain prefix for a subdomain. Paste the IP address into the value field.
If Manus gave you a target hostname, create a CNAME record. Set the host to the subdomain prefix such as www. Paste the target hostname exactly as provided into the value field.
Save your changes. Return to the Manus custom domain panel and look for a verification or check button. Manus will attempt to verify that the DNS records have been set correctly. If verification fails, give the records more time to propagate and try again.
Once verification passes, Manus will typically issue an SSL certificate for your custom domain automatically. This may take a few additional minutes. After the certificate is issued, your domain will be fully connected and your project will be accessible through your custom domain over HTTPS.
Common Mistakes When Setting Up DNS in Manus
Several mistakes consistently trip people up when configuring DNS for Manus projects.
The most frequent mistake is using a CNAME at the root domain. As discussed, this is not supported by standard DNS. If you attempt this with most registrars, the record either will not save or will cause unexpected behavior.
The second most common mistake is entering the wrong host value. The host field in your DNS panel should contain only the prefix, not the full domain. If you want to configure www.yourdomain.com, the host should be www, not www.yourdomain.com. Entering the full domain in the host field creates a double domain that does not resolve correctly.
Another frequent error is copying the Manus-provided target value incorrectly. Missing a character, adding extra spaces, or changing capitalization can all cause DNS resolution to fail silently. Always copy and paste the target value directly from the Manus interface rather than typing it manually.
Some users also set extremely low TTL values thinking this will speed up propagation. In practice, very low TTLs can cause instability. A TTL of 300 to 3600 seconds is appropriate for most situations.
Finally, many people check whether their domain is resolving too soon after making the change. DNS propagation takes time. Use a tool like dnschecker.org to monitor propagation across multiple global servers rather than relying on your local browser, which may be serving cached results.
SSL, HTTPS, and Why Your DNS Choice Affects Security
Manus automatically provisions SSL certificates for custom domains using Let’s Encrypt or a similar certificate authority. This process requires that your DNS records are correctly configured and that the domain resolves to the Manus infrastructure before the certificate can be issued.
If you use a CNAME pointing to a Manus hostname, the platform has full visibility into where your domain points and can complete domain validation efficiently. If you use an A Record, Manus will validate ownership through the IP address.
In either case, once the certificate is issued, your project will be served over HTTPS. Manus handles the certificate renewal automatically, so you do not need to manage this manually.
There is one scenario where your DNS choice can complicate SSL issuance: if you use a DNS provider that applies proxy services, such as Cloudflare’s orange-cloud proxy mode, the actual IP address that Manus sees during validation may be Cloudflare’s proxy IP rather than the destination you configured. In most cases this is handled correctly, but if you encounter SSL issuance delays after configuring a proxied record, temporarily switching the record to DNS-only mode during initial verification can resolve the issue.
Managing Multiple Domains and Environments in Manus
As your projects grow, you may want to connect multiple domains or create separate environments for development, staging, and production. DNS record types play a role in making this manageable.
For a structured multi-environment setup, consider using subdomains with CNAME records pointing to different Manus projects. For example, app.yourdomain.com points to your production project, staging.yourdomain.com points to your staging project, and dev.yourdomain.com points to your development project. Each CNAME entry is independent, easy to read in your DNS panel, and simple to update if a project is replaced.
For client-facing work, using your client’s custom domain with a CNAME pointing to your Manus project is a clean, professional approach that allows you to update the underlying project without touching the client’s DNS again.
Why This Decision Matters for Your Business and Clients
If you are using Manus for client work, whether that is building internal tools, customer portals, or business applications, your DNS configuration is the foundation of how clients access and perceive your work. A properly configured custom domain with HTTPS looks professional. It builds trust. It is the difference between sending a client to app.yourdomain.com and sending them to a generic platform URL.
Getting the A Record versus CNAME decision right the first time saves hours of troubleshooting. It means clients see a working product at launch rather than a DNS error. For agencies and freelancers billing by the project, every hour spent on DNS issues is an hour not spent on billable work.
For those building SaaS products or subscription services on Manus, clean custom domain configuration is also essential for branding. White-labeled tools that live on your domain rather than a Manus subdomain maintain brand consistency across every touchpoint.
Quick Reference: A Record vs CNAME in Manus
Use an A Record when Manus provides an IP address, when you are configuring a root domain without CNAME flattening support, or when your DNS provider does not support ALIAS or ANAME records.
Use a CNAME when Manus provides a target hostname, when you are configuring a subdomain such as www or app, or when you want your domain to automatically follow Manus infrastructure changes.
Use CNAME flattening or an ALIAS record when you want the simplicity and flexibility of a CNAME but need to apply it at the root domain level, and your DNS provider supports this feature.
Final Thoughts: Choosing the Right DNS Record for Manus
DNS does not have to be intimidating. Once you understand what A Records and CNAME records actually do, the decision for Manus becomes straightforward. Look at what Manus tells you to use during the custom domain setup process, follow those instructions precisely, and use a provider that supports CNAME flattening if you want clean root domain routing.
If you are building projects on Manus for yourself or for clients and want a domain setup that works reliably from day one, the guidance in this post gives you everything you need. The technical details are manageable. The setup takes minutes when done correctly. And the result is a professional, branded, HTTPS-enabled project that reflects the quality of the work behind it.
If you need help setting up DNS for a Manus project, migrating an existing site to Manus, or configuring custom domains for client deployments, reach out. This is exactly the kind of technical detail that separates a smooth launch from a stressful one, and it is worth getting right.