Free LLM API Studio
Simulate a failover router over free LLM provider keys with
Free LLM API Studio!!! — Simulate a failover router over free LLM provider keys with fallback chains and quota tracking.
How to use Free LLM API Studio
- Add provider keys with a name, label and monthly token cap
- Reorder keys to set your preferred fallback chain priority
- Choose planned outcomes per attempt, such as rate-limited then success
- Send a request and watch which key it routes to and how many hops it takes
- Check the request log to see failover paths and cooldowns
- Copy the client snippet to point any OpenAI-compatible app at the router
Features
- Provider key registry with monthly token caps and labels
- Priority-ordered fallback chain with drag-free move up/down controls
- Request simulator with per-attempt outcome planning
- Per-key cooldown bookkeeping: 60s rate limits up to 24h auth failures
- Model-level benching after 3 failures in 15 minutes
- Per-key and total usage tracking against monthly caps
- OpenAI SDK client snippet for the unified endpoint
- Router config export as JSON
Frequently asked questions
Is it free?
Yes, unlimited.
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