Conclusion
- Fastest testing path: no-card providers with OpenAI-compatible endpoints.
- Best China testing path: SiliconFlow, Zhipu, Qwen, or DeepSeek depending on account access.
- Free tokens are useful for smoke tests, but scattered credits are fragile for production.
- Never put test keys in frontend code or public repos.
What to do next
- Choose a provider that issues an API key before card verification or offers free models.
- Store the key in an environment variable and use an OpenAI-compatible SDK when possible.
- Send a tiny prompt and verify latency, error shape, streaming support, and real quota usage.
- Document model name, base_url, rate limit, expiration date, and paid upgrade price.
- Add a fallback provider before sharing the app with users.
Recommended paths
| Provider | Free / credits | Best for |
|---|---|---|
| OpenRouter | Free models, rate limited | Fast no-card API-key tests |
| SiliconFlow | Free models + ¥14 credit | China-direct free testing |
| Zhipu GLM | 5M signup tokens | GLM tests and China apps |
| Qwen | 70M signup tokens | Chinese, coding, and long-context tests |
| Groq | Free developer limits vary | Fast Llama-family smoke tests |
Global developer checklist
- Confirm whether signup, billing, and API keys work from your country before writing production code.
- Prefer OpenAI-compatible endpoints when you may need to switch models, regions, or providers later.
- Test free credits with a real smoke prompt and record latency, error shape, streaming behavior, and quota burn.
- Keep at least one fallback route for provider outages, model deprecations, and regional access changes.
Production handoff
When the free test works, move to one stable key
Keep the no-card provider for validation, then route real traffic through one compatible key with GPT, Claude, Gemini, DeepSeek, Qwen, and fallback controls.
FAQ
Can I get a free AI API key without a credit card?
Yes, but availability changes. Look for providers with free models, signup credits, or developer limits that do not require card verification before key creation.
Can I use a free key in production?
Usually no. Free keys are rate-limited, can expire, and may change terms. Use them to validate, then add paid fallback.
What should I test first?
Test one short chat completion, streaming if needed, JSON/tool behavior if your app uses it, and dashboard quota consumption.
What is the safest way to store the key?
Use server-side environment variables or a secrets manager. Do not expose API keys in browser JavaScript, mobile apps, or Git commits.