Conclusion
- No-card APIs are useful for Vercel AI SDK smoke tests, not unattended production.
- The key, baseURL, model, timeout, and max tokens belong in server-side env vars.
- Compatible endpoints still need testing for streaming, JSON, tool calls, and error shapes.
- Before launch, add spend logs, fallback, rate limits, and per-user quotas.
What to do next
- Create a private Next.js route handler that reads baseURL, apiKey, and model from env vars.
- Run one minimal streaming and one JSON response test before connecting your UI.
- Compare at least one no-card route, one low-cost paid route, and one fallback model.
- Log provider, model, tokens, latency, errors, user id, and final accepted result.
- Use OpenLLMAPI when you want one Vercel AI SDK-compatible endpoint with budgets and fallback.
Recommended paths
| Provider | Free / credits | Best for |
|---|---|---|
| OpenRouter/Groq | Free routes vary | Fast JavaScript prototypes and demos |
| Qwen DashScope | Signup credits vary | China-friendly compatible baseURL tests |
| DeepSeek | Verify current pricing | Low-cost reasoning route after prototype |
| Zhipu GLM | Signup tokens vary | Domestic fallback for Next.js chatbots |
| OpenLLMAPI | Trial varies | One endpoint with logs, budgets, routing, and fallback |
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
Ship your Vercel prototype with a production route ready
Use one OpenAI-compatible endpoint for Vercel AI SDK with server-side keys, fallback, spend logs, and UTM-tagged signup tracking.
FAQ
Can Vercel AI SDK use OpenAI-compatible APIs?
Yes for many chat workflows if you set the compatible baseURL, key, and model explicitly. Still test streaming, structured output, and error behavior.
Can I expose a free API key in client code?
No. Put the key in a server-side route handler or backend. The browser should only call your own endpoint.
Which no-card provider should I start with?
Start with whichever legitimate provider passes signup fastest and supports your SDK, then benchmark it against a low-cost paid route.
When should I stop relying on free routes?
Before real users, paid features, support chatbots, scheduled jobs, or workflows where failure creates business cost.