Conclusion
- Coding-agent compatibility is more than chat completion: test streaming, tool calls, long context, patch quality, and error shapes.
- Qwen and DeepSeek are strong low-cost coding routes; GLM and SiliconFlow are practical China-friendly fallbacks.
- Many failures happen because the tool keeps the default OpenAI endpoint or a preset overrides custom base_url.
- Use a gateway when multiple tools, teammates, or autonomous loops need one key, route logs, fallback, and budget caps.
What to do next
- Create a legitimate provider key and copy the exact compatible base_url, auth format, and model name from official docs or your gateway dashboard.
- Configure model, base_url, and API key explicitly in Cline, RooCode, or KiloCode; do not only replace the key.
- Run three smoke tests: small repo-read, one-file edit, and JSON/tool-call task; record accepted patch rate, latency, error body, and token cost.
- Check logs or proxy traces to confirm the request goes to the intended endpoint, not the default OpenAI host.
- Set daily/monthly budgets before enabling autonomous loops or large refactors.
- Keep a stronger fallback for failed edits, invalid JSON/tool calls, context overflow, or repeated retries.
Recommended paths
| Provider | Free / credits | Best for |
|---|---|---|
| Qwen | Signup credits vary | China-friendly coding, long context, and custom compatible setup |
| DeepSeek | Credits/pricing vary | Low-cost coding and reasoning routes |
| Zhipu GLM | Signup tokens vary | Domestic GLM coding fallback and compatible-client tests |
| Groq/OpenRouter | Free routes vary | Fast smoke tests and broad model experiments |
| OpenLLMAPI | Trial varies | One compatible endpoint with coding-agent routing, logs, budgets, 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
One budgeted key for your coding agents
Put Cline, RooCode, KiloCode, and other coding tools behind one OpenAI-compatible endpoint with logs, budget caps, fallback routes, and UTM-tagged coding-agent signup.
FAQ
Can any OpenAI-compatible API work in Cline or RooCode?
Basic chat may work, but coding agents also need streaming, tool-call behavior, long context, stable errors, and patch quality. Always run an edit-task smoke test.
Why does my tool still call OpenAI?
Common causes are blank base_url, a provider preset overriding custom settings, a different environment variable, or setting only the key without changing the endpoint.
Which model should I start with?
Start with a cheap coding route such as Qwen or DeepSeek, then keep GLM, Groq/OpenRouter, or a premium route as fallback for large refactors and repeated failed patches.
Is a gateway required?
No. It becomes useful when you manage several tools, teammates, budgets, or fallback rules and do not want each IDE profile to hold separate provider keys.
Should I paste shared or reseller keys into IDE extensions?
No. Use legitimate provider keys, keep production keys server-side or in a controlled gateway, and rotate test keys regularly.