The Grok3 API launched by xAI has become a popular choice for developers and businesses exploring AI capabilities. The Grok3 API is not only powerful but also offers new users a free credit of up to $150, sufficient to support initial development and testing. However, for domestic users, binding international payment methods and recharging may pose a challenge. This article will detail how to easily apply for and recharge the xAI Grok3 API through WildCard, helping you get started quickly.
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Why Choose WildCard?#
For domestic users, the payment process is often the biggest pain point when subscribing to overseas services or recharging APIs. Traditional bank cards (like UnionPay) often cannot directly pay in USD due to currency restrictions or risk control, while virtual cards such as Dupay, VCard, PokePay, WasabiCard, and LocalCard support cryptocurrency recharges but require cumbersome steps like purchasing USDT, and their stability varies.
WildCard is designed specifically for domestic users, supporting recharges via Alipay and WeChat, making it simple to operate without involving cryptocurrency. Its payment channels are optimized, offering stability and security far superior to other virtual cards, making it particularly suitable for binding to xAI's Grok3 API or subscribing to overseas services like ChatGPT Plus and OpenAI API. Registering with the invitation code "LEIXUE" also provides card opening discounts, offering great value.
Steps to Apply for the $150 Free Credit for Grok3 API#
1. Register for an xAI Account#
First, visit the xAI official website (https://x.ai/api), click "Sign Up" to create an account. Fill in basic information such as email and password, and verify your email to log in. xAI currently offers new users a free API credit of $150, with no immediate need to bind a payment method, but binding a card will be required for future recharges or exceeding the limit.
2. Activate WildCard#
- Visit the official website: Open the WildCard official website and click "Register" in the upper right corner.
- Create an account: Enter your phone number (select "+86" for mainland users), obtain a verification code, and submit to register.
- Open a card: After logging in, go to the "My Cards" page, select the card duration (1 year for $11.99 or 2 years for $16.99). Enter the invitation code "LEIXUE" on the payment page to enjoy a $1 discount.
- Recharge: Recharge via Alipay or WeChat scan code, it is recommended to recharge $25 for the first time (to cover a possible $5 pre-authorization fee and subsequent use). After recharging, WildCard will generate a virtual Visa card, including card number, expiration date, and CVV code.
3. Bind WildCard to xAI#
Log in to your xAI account, go to the API management page, and select "Billing" or "Payment Methods." Click "Add Payment Method," and enter the card number, expiration date, and CVV code provided by WildCard. xAI may initiate a small pre-authorization (usually $1-5), and once the card is confirmed as valid, it can be successfully bound.
4. Use Grok3 API#
After binding the card, the free $150 credit will be automatically activated. Access the xAI API documentation, obtain the API Key, and start calling Grok3's features. Whether it's text generation, data analysis, or intelligent Q&A, Grok3 can provide efficient support. Be sure to monitor usage to avoid exceeding the free limit.
Important Notes and Practical Suggestions#
- Network Environment: When binding the card or calling the API, it is recommended to use a stable overseas network environment to avoid payment failures due to IP restrictions. If using a proxy, choose a less crowded node or a home network IP.
- Recharge Strategy: WildCard supports a minimum recharge of $5, with a reasonable fee of 3.5%. Users who have not completed Alipay facial verification are limited to a monthly quota of $100, which can be increased to $3000 after verification.
- Multi-Scenario Applicability: WildCard not only supports xAI but can also be used to subscribe to services like ChatGPT Plus, Claude, Midjourney, and even for purchases in Google Play and Apple Store, offering comprehensive functionality.
- Security: WildCard does not require KYC verification, ensuring account information security. Compared to cryptocurrency-dependent services like Dupay or VCard, its payment channels are more stable, making it suitable for long-term use.
Conclusion#
Through WildCard, domestic users can easily apply for the $150 free credit for the xAI Grok3 API and achieve stable recharges. Compared to other virtual cards, WildCard's Alipay/WeChat recharge method significantly lowers the operational threshold, and the optimized payment channels ensure a high success rate. Whether you are a developer, content creator, or small business, WildCard is an ideal choice for subscribing to overseas AI services. Visit the WildCard official website now, register using the invitation code "LEIXUE," and start your AI exploration journey!