Google Maps Platform has become a standard component of web and mobile applications, logistics systems, and e-commerce platforms. Maps, geocoding (converting an address into geographic coordinates) and route planning are now features without which it is difficult to imagine a modern digital product.
In most organizations, however, implementation ends the moment the map appears on the screen. It works, so the topic is considered closed. But this approach creates several problems: no one manages the API keys, no one monitors costs, and no one knows how intensively the service is actually being used.
Let’s be clear: a working API doesn’t automatically mean it’s secure, controlled, or cost-optimized. Google publishes extensive guidelines on key restrictions, monitoring, and access control, including API Security Best Practices and API Keys documentation in Google Cloud. In practice, however, these recommendations are often implemented only partially, or not at all.
In this article, we look at the most common mistakes made when using the Google Maps API, the risks they create, and the specific steps you can take to eliminate them.
The problem isn’t the technology. It’s the organization
Before discussing the mistakes themselves, it’s worth understanding one important point about the architecture of Google’s services.
Google Maps Platform is a set of services available through APIs. Google Cloud Platform is the environment in which these services are managed. API keys are created in the Google Cloud Console. Billing is handled through Google Cloud Billing. Permissions are controlled via Google Cloud IAM (Identity and Access Management).
In practice, this means that configuration mistakes can happen in two places at the same time: at the level of the Google Maps API key itself and at the level of the Cloud project and infrastructure. These two layers are closely connected, and both can create risk.
Incidents involving the Google Maps API rarely result from vulnerabilities in the technology itself. The main cause is usually a lack of proper processes. Organizations often treat an API key as a minor detail hidden somewhere in the code, when in reality it should be treated as a business asset that generates costs and carries real risk.
The most common mistakes in handling Google Maps APIs
The process gaps mentioned above translate directly into technical mistakes. In the next part of this article, we describe the most common issues. For clarity, we’ve marked which ones relate to API key configuration errors (Google Maps Platform) and which relate to the cloud environment (Google Cloud).
Google Maps Platform – the mistake concerns API key configuration and how the key is used
Google Cloud – the mistake concerns project, environment, or billing management
1. No API key restrictions
This is the most common and most dangerous mistake. Developers generate keys without HTTP restrictions for websites. They skip IP restrictions for the backend. They don’t assign keys to specific mobile applications. One universal key is used in testing, production, and on developers’ local machines. Once leaked, it becomes an easy target. The company can’t stop the attack in real time, while the costs caused by uncontrolled API usage grow rapidly.
Google Maps Platform
2. One API key for multiple applications
Teams often use the same key across web applications, mobile apps, and the backend (the server-side layer of the system). It’s convenient, but unsafe. This setup completely hides the source of traffic in the system. Costs cannot be assigned to a specific project. Worse still, a potential leak can paralyze the entire company. Replacing a compromised key stops all services connected to it.
Google Maps Platform
3. No environment separation
Companies very often use a single billing account and one Google Cloud project for the entire software lifecycle. The same key serves both testing and production environments. As a result, automated tests consume the production budget. A simple developer mistake in the test environment can generate thousands of unnecessary requests and enormous costs.
Google Cloud
4. API keys in the frontend and public repositories
JavaScript code and mobile applications often contain exposed API keys. Developers sometimes also place them in public Git repositories — code hosting platforms such as GitHub. This is an ideal scenario for bots. Automated scanners can detect this type of mistake within minutes. Criminals can use the key for their own purposes or resell access to others, while the victim’s API usage bills can suddenly increase by thousands of dollars and put the entire business at financial risk.
Google Maps Platform
5. Excessively broad permissions
Application developers often give keys access to all Google APIs. They do this “just in case”, even when a given application only needs, for example, a simple map. This practice significantly increases the potential attack surface. A stolen key can be used to launch much more expensive cloud services. Attackers may then exploit routing APIs or advanced artificial intelligence models.
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Google Maps Platform + Google Cloud
6. No cost monitoring or alerts
Many companies find out about a breach only at the end of the month, when they receive their monthly invoice. Their systems lack financial alerts. No one analyzes current usage. No one reacts to suspicious spikes in daily statistics. The company notices the problem only after the loss has already become significant. Google Cloud does offer ready-made mechanisms for budgets and request limits. However, the default settings are too permissive to provide real protection against an attack. They need to be deliberately configured and reviewed regularly.
Google Cloud
7. No centralized management
API keys are often created ad hoc, with no consistent access rules. This is a recipe for disaster. Every project should have an assigned owner, and the organization should clearly know who is responsible for each part of the infrastructure.
Google Cloud
8. Unused keys and unnecessarily enabled services
Over time, unused API keys accumulate in Google Cloud projects — remnants of old applications, tests, or former employees. Each such key is a potential attack point that no one remembers anymore. The same issue applies to services enabled in a project “just in case”, even though no application actually uses them. The more active services and keys there are, the larger the attack surface. The simplest rule is: delete keys that no longer serve any traffic, and disable services you don’t use. Disabling a service at the project level is more effective than key-level restrictions, as no key will work with a disabled service.
Google Cloud
Real-world cases
Case 1: A $15,000 bill after a single leak
A developer accidentally exposed their API key. Attackers quickly took it over and used it to send mass requests to AI models. The bill reached USD 15,000 and nearly bankrupted the entire startup. This case proves that stolen keys are immediately monetized by automated systems.
Source: TechRadar
Case 2: An $18,000 loss in one night
A Google Cloud customer set an internal budget of USD 7. They also applied a spending cap of USD 1,400. The next morning, they saw an invoice for USD 18,000. Bots generated more than 60,000 requests through a forgotten key. As this example shows, a cloud “budget” alone won’t stop an attack. Hard API-level request limits are absolutely essential.
Source: Tom’s Hardware
Case 3: Public repositories full of API keys
Academic research confirms that API key leaks are a systemic problem. Researchers analyzed the contents of platforms such as GitHub. Thousands of active access keys are constantly visible in public code. Criminals routinely scan these resources.
Source: arXiv 2306.08151
Each of these incidents could’ve been predicted and prevented. Below, we explain how to do it.
How to fix API key management mistakes, protect yourself from attacks, and avoid major financial losses
Start with immediate action. The first step is a thorough audit. Check who uses each key and where it’s being used. Then apply strict restrictions. Limit every key to a specific source: for websites, define the allowed domains; for servers, specify their network addresses (IP addresses).
The next step is physical project separation. Consistently separate the development environment from production. Set up cost notifications and enable hard request limits. Finally, assign owners to all resources. Every key and every project must have one responsible person.
Short-term “rescue actions” are one thing, but it’s also necessary to introduce permanent procedures that ensure the secure use of Google services:
- Rotate keys on a regular schedule.
- Limit the permissions of every key to the absolute minimum — one API, one application.
- Manage access centrally using IAM.
- Regularly review API key configuration, and monitor usage and costs.
- Install access key scanners in your repositories. The system will block code from being pushed if it detects unsecured credentials, such as an API key.
- Remove unused keys and disable unnecessary services in Google Cloud projects. The fewer active resources you have, the smaller the potential attack surface.
- Use official Google SDKs (Maps SDK for Android, iOS, and JavaScript) instead of direct REST API calls. They provide access to additional security mechanisms that cannot be enabled for manual HTTP requests.
- For mobile and web applications, consider using Firebase App Check. This mechanism verifies that API requests really come from your application, not from a bot pretending to be it.
- In server-to-server communication, consider OAuth 2.0 wherever a given Google service supports it. Temporary access tokens are harder to exploit after a leak than static API keys.
- If a mobile or browser-based application needs to call Google Maps services that aren’t supported by client-side SDKs, build an intermediary layer between the application and Google, a so-called proxy server. This server signs and sends requests on behalf of the client, so the API key never ends up on the user’s device.
Summary
The Google Maps API is a secure and predictable tool, but only when configured correctly. The greatest risks don’t come from the technology itself, but from the processes around it. A lack of basic safeguards leads to security breaches, loss of cost control, and real financial damage.
The good news is that most of the risk can be eliminated within a few days. A key audit, proper restrictions, environment separation, and cost alerts solve most of the problems. The rest comes down to improving processes and assigning responsible owners. It’s an investment that pays for itself the first time an incident is avoided.
Don’t wait for a massive Google Cloud services invoice before you take action. Order a professional review of your Google Maps API environment.
We’ll verify your key configuration and optimize your costs. Contact us and use Google services without worrying about security or your budget.