Getting an AI API key for free is possible, but only when the provider offers a real free tier for your account and region. The safe route is to create your own credential in the provider’s official console, then use the models and limits shown there. A free chat subscription is a separate product and does not automatically include API access or credit.
API keys, tokens, and free chat are different
An API key is a credential. Your program sends it with an API request so the provider can identify the project or account, apply access rules, and measure usage. An access token can also be an authentication credential. In model usage and billing, however, tokens are units of text processed by the model. Providers count input and output tokens against quotas or charges. Creating a key does not give you unlimited usage. A free web or mobile chat plan is a separate product and does not automatically grant API access or API credit.
Free access is also not unlimited. Models, regions, age or account eligibility, verification requirements, data-use terms, and capacity can change. Treat any quota shown in an old tutorial as outdated unless it is visible in the provider’s current documentation or your account.
Option 1: Google Gemini API through Google AI Studio
Google’s current Gemini documentation says new accounts begin on the Free Tier, with access to certain models and their free-tier rate limits. The pricing page marks free models and features separately from paid access, so check the exact model before building around it. Some models have no free access, and the list can change.
How to create the key
- Open Google AI Studio and sign in with an eligible Google account.
- Accept the applicable terms, open the API Keys page, and use the automatically created project and key if Google provides them. Otherwise import an existing Google Cloud project or choose Create API key.
- Choose a model listed as available to your Free Tier project. Do not assume that a model shown in an SDK example is free for your account.
- Open AI Studio’s usage or rate-limit view before testing. Google measures limits such as requests per minute, input tokens per minute, and requests per day. Limits are applied per project, not per key, and Google says the active values can change with the project’s tier and account status.
Google’s documentation recommends environment variables such as GEMINI_API_KEY or GOOGLE_API_KEY. For production, use a backend and a secret manager. Google also warns that exposed keys can let someone consume quota, create charges, or access private resources. Apply API and application restrictions where appropriate, and replace and disable a key if it leaks.
Option 2: GroqCloud’s developer API
Groq offers a Free tier with rate limits and an official API-key workflow. Its billing FAQ distinguishes that tier from the paid Developer tier, which requires a valid payment method to upgrade. Stay on the Free tier if your goal is free API access, and do not enable a paid upgrade just to follow a tutorial. Groq hosts multiple models. Its model catalog shows the currently available model IDs, prices, and plan information. Availability is provider-controlled, so select a model from the live catalog instead of copying a retired model name from a blog post.
How to create and use a Groq key
- Sign in to GroqCloud, open the official API Keys page, and create a key for your project.
- Store it locally as an environment variable, for example
GROQ_API_KEY, following Groq’s quickstart. Use a placeholder such as<your-api-key-here>in documentation, never a real secret. - Check the account’s Limits page and the selected model’s live entry before sending requests. Groq measures several dimensions, including requests per minute or day and tokens per minute or day. The exact limits are organization-level and account-specific. Groq also exposes remaining-limit information in response headers.
Free-tier requests can be blocked when you reach a limit, even if the service itself is available. A 429 response means you need to slow down and retry according to the provider’s guidance, not search for a replacement key.
Keep a free key safe
- Keep API calls on your server. Never place a real key in browser JavaScript, a mobile app bundle, a public demo, or a client-side repository.
- Put local secrets in an environment file that is listed in
.gitignore. Check the staged diff before every commit. - Use separate keys or projects where the provider supports that, restrict access, and give collaborators only the permissions they need.
- Rotate keys periodically and revoke or disable them immediately after a leak. Review usage and billing dashboards for unexpected activity.
Do not use token generators, “free key” websites, shared keys, leaked credentials, or bypass schemes. They can expose your data, violate provider terms, exhaust someone else’s quota, and put your account or project at risk. The legitimate free method is simple: use the provider’s own console, read the current eligibility and limits, and keep the credential private.