Your Gemini API Tools Will Break After June 19 Unless You Do This

LinkBlogs

Gemini API Is Blocking Unrestricted Keys From June 19, 2026 — Here Is What You Need to Do Right Now

Google is blocking unrestricted Gemini API keys from June 19 2026. Here is how to fix yours in two minutes before your tools stop working.

Hey everyone 👋

Important heads up for anyone using the Gemini API in their blog tools, automations, or any AI-powered workflow. This one is time-sensitive so please read it properly before scrolling past.

Google just announced that starting June 19, 2026, the Gemini API will stop accepting requests from unrestricted API keys.

If you have an unrestricted API key sitting in your project right now and you do nothing about it, your Gemini-powered tools will simply stop working after that date. No warning, no grace period. Just broken integrations.

Here is everything you need to know and exactly what to do right now.

Why Is Google Doing This?

Two main reasons: unauthorized usage and billing risks.

Unrestricted API keys are basically open doors. If someone gets access to your key, they can use it to make requests on your behalf. You get the bill. They get the free AI usage. This has been a growing problem as Gemini API adoption has exploded in 2026.

An unrestricted key can also be accidentally exposed in public GitHub repositories, front-end code, or shared scripts. It happens more than people admit. Google restricting these keys is honestly overdue and the right move, even if the deadline is stressful for people who did not know about it until now.

How Do You Know If You Are Affected?

You are affected if ALL of these are true:

You have a Google Cloud project with the Gemini API enabled
That project contains one or more API keys that are set to "unrestricted"
You are actively using that key in any tool, script, plugin, or workflow

To check your keys right now:

Go to Google Cloud Console > APIs and Services > Credentials

Look at your existing keys. If any of them show "None" under the restrictions column, those are unrestricted and need to be fixed before June 19.

What Exactly Do You Need to Do?

Google has given two clear options. Pick whichever one fits your situation:

Option 1: Restrict Your Existing Keys (Quickest Fix)

If you want to keep using the same API key without updating your code, just add a restriction to it:

Go to Google Cloud Console > APIs and Services > Credentials
Click on the API key you want to restrict
Under the "API restrictions" section, select "Restrict key"
From the dropdown, select Generative Language API (this is the Gemini API, listed as generativelanguage.googleapis.com)
Click Save

That is it. Your existing key is now restricted to Gemini only and will continue working after June 19.

The whole process takes about two minutes. No code changes needed.

Option 2: Generate New Restricted Keys in AI Studio (Cleaner Long-Term)

If you want to start fresh with properly configured keys, generate new ones directly through Google AI Studio:

Go to aistudio.google.com/app/apikey
Create a new API key
Keys generated directly in AI Studio are restricted to the Gemini API by default, so no extra configuration needed
Copy the new key and update it in your code, tool, or workflow wherever you currently have the old key stored

This option is slightly more work upfront because you need to update your code, but it is the cleaner approach if you are building something properly from scratch or reorganizing your projects.

Important note on AI Studio keys: Keys created through AI Studio are tied to your Google account rather than a specific Google Cloud project. This matters if you are sharing API access across a team or have billing set up at the project level. In that case, Option 1 on the Cloud Console is probably the better fit.

For Bloggers Using AI-Powered Tools: What This Means Practically

Not everyone here is a developer, so let me translate this into plain terms for people using AI tools built on top of the Gemini API:

If you use a third-party tool (a plugin, a content automation platform, a writing assistant) that connects to Gemini API in the background, the tool developer needs to handle this update on their end. Check with the tool's support team or changelog to confirm they are on top of it before June 19.

If you built or customized your own tool with a Gemini API key (even something simple like a Google Apps Script that uses Gemini), you need to handle this yourself using one of the two options above.

If you use Google AI Studio directly in your browser without an API key, this change does not affect you at all. You are fine.

What Happens If You Miss the June 19 Deadline?

Google has been clear: after June 19, the Gemini API will simply reject requests coming from unrestricted keys. Your tool will throw an error. Depending on how your code handles errors, it will either crash silently or give you an error message.

There is no indication Google will extend the deadline. Given how clearly they have communicated the two fix options and given that the fix takes literally two minutes, they are probably not going to be lenient on this one.

Security Best Practices Worth Doing While You Are at It

Since you are already in your Google Cloud credentials page fixing your keys, here are a few extra things worth doing at the same time:

Check for exposed keys in your code. Search your codebase, any GitHub repositories, and any shared scripts for your API key string. If you find it hardcoded anywhere that is even slightly public, rotate the key immediately (generate a new one and delete the old one).

Set up application restrictions too. Beyond API restrictions, you can also restrict which applications or IP addresses can use your key. If your Gemini API calls only come from one server or one application, lock the key to that source only.

Store keys in environment variables, not in code. If your key is hardcoded directly in a script or config file, move it to an environment variable or a secrets manager. This is the most common way API keys get accidentally exposed.

Review who has access to your Google Cloud project. While you are in the console, check your project's IAM settings. If former team members or old integrations still have access, now is a good time to clean that up.

Quick Action Checklist Before June 19

Here is a simple checklist to run through right now:

Log in to Google Cloud Console
Go to APIs and Services > Credentials
Identify any unrestricted API keys in your project
Choose Option 1 (restrict existing key) or Option 2 (generate new AI Studio key)
Update your code if you generated a new key
Search your codebase for any hardcoded key strings
Confirm your third-party Gemini-powered tools are updated by their developers

The whole thing should take 15 to 30 minutes depending on how many integrations you are running. Much better than waking up on June 20 with broken tools.

Has Anyone Already Done This Fix?

Would love to hear from people who have already gone through the process. Was it straightforward? Did you run into any issues switching from unrestricted to restricted keys? Any gotchas worth flagging for others in the community before the deadline hits?

Drop your experience below so everyone here can get ahead of this before June 19. 👇

**Tags:** Gemini API Key Restriction, Gemini API Update June 2026, Restrict API Key Google, Google Cloud Credentials, AI Studio API Key, Gemini API Security, Unauthorized API Usage, Google AI API Update, Generative Language API, API Key Best Practices, Gemini API Bloggers, Google Cloud API Fix, API Security 2026, Gemini API Changes, AI Forum, AI Webloggers

AlgoAuthor

Thanks for the timely reminder, @LinkBlogs . Many developers don't regularly check API announcements, so posts like this are really valuable. If someone misses an important update like this, their application could suddenly stop working without any warning. I think it's a good habit to review API documentation and release notes regularly. A few minutes of checking updates can save hours of debugging later. Really appreciate you sharing this before it catches more developers by surprise!